# Nav Categories

A store landing screen with a heading, help links and a scrolling row of product categories with photos.

Nav Categories is an open-source mobile screen from suiss/uim for React Native and Expo, with SwiftUI and Jetpack Compose versions built from the same design tokens. The @esuiss/uim CLI copies its source into your project, so you own the code.

Source: https://uim.suiss.app/docs/blocks/nav-categories

![Preview](https://uim.suiss.app/previews/blocks-nav-categories--default.light.webp)

```tsx title="uniwind/components/blocks/nav-categories.tsx"
import * as React from "react"
import { Image, Pressable, ScrollView, View } from "react-native"
import { FadeIn, FadeInDown, ReduceMotion } from "react-native-reanimated"
import { AnimatedView } from "@/components/ui/animated-view"
import { Chip, ChipGroup } from "@/components/ui/chip"
import { Screen } from "@/components/ui/screen"
import { Text } from "@/components/ui/text"

const photo = (id: string) =>
  `https://images.unsplash.com/photo-${id}?w=400&q=80&auto=format&fit=crop`

const CATEGORIES = [
  { label: "Laptop", image: photo("1785245560368-f6d715956e5d") },
  { label: "Phone", image: photo("1714578187196-29775454aa39") },
  { label: "Pad", image: photo("1607452263110-39a87c399c50") },
  { label: "Watch", image: photo("1660844817855-3ecc7ef21f12") },
  { label: "Pods", image: photo("1599669454699-248893623440") },
  { label: "Cases", image: photo("1703676311066-34caf2cbee33") },
  { label: "Camera", image: photo("1604677209244-6569d050557a") },
  { label: "Colors", image: photo("1633596683562-4a47eb4983c5") },
  { label: "Pro", image: photo("1760978631841-f3754859ca59") },
  { label: "Accessories", image: photo("1645323927877-3de25b4f819c") },
]

function NavCategories({
  onSelectCategory,
  onAskSpecialist,
  onFindStore,
}: {
  onSelectCategory?: (label: string) => void
  onAskSpecialist?: () => void
  onFindStore?: () => void
}) {
  const [selected, setSelected] = React.useState("Phone")

  return (
    <Screen>
      <ScrollView contentContainerClassName="gap-7 pt-11 pb-10">
        <AnimatedView
          entering={FadeInDown.duration(600).reduceMotion(ReduceMotion.System)}
          className="gap-6 px-5"
        >
          <View className="gap-1">
            <Text role="heading" className="text-3xl font-bold">
              Store.
            </Text>
            <Text className="text-xl text-label-secondary">
              The best way to buy the suiss products you love.
            </Text>
          </View>
          <View className="items-start gap-1.5">
            <Text className="text-xs font-semibold text-label-secondary">
              Need shopping help?
            </Text>
            <Pressable
              role="link"
              hitSlop={6}
              onPress={onAskSpecialist}
              className="active:opacity-60"
            >
              <Text className="text-xs text-link">Ask a Specialist ›</Text>
            </Pressable>
            <Pressable
              role="link"
              hitSlop={6}
              onPress={onFindStore}
              className="active:opacity-60"
            >
              <Text className="text-xs text-link">
                Visit a suiss Store near you ›
              </Text>
            </Pressable>
          </View>
        </AnimatedView>
        <ChipGroup
          scrollable
          value={[selected]}
          onValueChange={(value) => {
            if (!value[0]) return
            setSelected(value[0])
            onSelectCategory?.(value[0])
          }}
          accessibilityLabel="Categories"
          className="px-5"
        >
          {CATEGORIES.map((category) => (
            <Chip
              key={category.label}
              value={category.label}
              accessibilityLabel={category.label}
              className="h-10 gap-2 ps-1 pe-3.5"
            >
              <Image
                source={{ uri: category.image }}
                resizeMode="cover"
                accessibilityIgnoresInvertColors
                className="size-8 rounded-full bg-surface-secondary"
              />
              <Text numberOfLines={1}>{category.label}</Text>
            </Chip>
          ))}
        </ChipGroup>
        <View className="mx-5 border-t border-separator pt-5.5">
          <AnimatedView
            key={selected}
            entering={FadeIn.duration(400).reduceMotion(ReduceMotion.System)}
            accessibilityLiveRegion="polite"
          >
            <Text className="text-2xl font-semibold">
              The latest.{" "}
              <Text className="text-2xl font-semibold text-label-secondary">
                Take a look at what's new in {selected}.
              </Text>
            </Text>
          </AnimatedView>
        </View>
      </ScrollView>
    </Screen>
  )
}

export { NavCategories }
```

```swift title="swift/Blocks/NavCategories.swift"
import PhosphorSwift
import SwiftUI

public struct NavCategories: View {
  struct Category: Identifiable {
    let label: String
    let image: URL?

    var id: String { label }
  }

  static func photo(_ id: String) -> URL? {
    URL(string: "https://images.unsplash.com/photo-\(id)?w=400&q=80&auto=format&fit=crop")
  }

  static var categories: [Category] {
    [
      Category(label: "Laptop", image: photo("1785245560368-f6d715956e5d")),
      Category(label: "Phone", image: photo("1714578187196-29775454aa39")),
      Category(label: "Pad", image: photo("1607452263110-39a87c399c50")),
      Category(label: "Watch", image: photo("1660844817855-3ecc7ef21f12")),
      Category(label: "Pods", image: photo("1599669454699-248893623440")),
      Category(label: "Cases", image: photo("1703676311066-34caf2cbee33")),
      Category(label: "Camera", image: photo("1604677209244-6569d050557a")),
      Category(label: "Colors", image: photo("1633596683562-4a47eb4983c5")),
      Category(label: "Pro", image: photo("1760978631841-f3754859ca59")),
      Category(label: "Accessories", image: photo("1645323927877-3de25b4f819c")),
    ]
  }

  private var onSelectCategory: ((String) -> Void)?
  private var onAskSpecialist: (() -> Void)?
  private var onFindStore: (() -> Void)?
  @State private var selected: String?
  @Environment(\.accessibilityReduceMotion) private var reduceMotion

  public init(
    onSelectCategory: ((_ category: String) -> Void)? = nil,
    onAskSpecialist: (() -> Void)? = nil,
    onFindStore: (() -> Void)? = nil
  ) {
    self.init(selected: "Phone")
    self.onSelectCategory = onSelectCategory
    self.onAskSpecialist = onAskSpecialist
    self.onFindStore = onFindStore
  }

  init(selected: String) {
    _selected = State(initialValue: selected)
  }

  public var body: some View {
    let current = Self.categories.first { $0.label == selected } ?? Self.categories[1]
    Screen {
      HeaderScrollView {
        HeaderLargeTitle("Store.")
        VStack(alignment: .leading, spacing: 28) {
          VStack(alignment: .leading, spacing: 20) {
            Text("The best way to buy the suiss products you love.")
              .scaledTextStyle(.xl)
              .foregroundStyle(Color.labelSecondary)
              .fixedSize(horizontal: false, vertical: true)
            VStack(alignment: .leading, spacing: 0) {
              Text("Need shopping help?")
                .scaledFont(.xs, weight: .semibold)
                .foregroundStyle(Color.labelSecondary)
              Button("Ask a Specialist ›") { onAskSpecialist?() }
                .buttonStyle(NavCategoriesLinkStyle())
              Button("Visit a suiss Store near you ›") { onFindStore?() }
                .buttonStyle(NavCategoriesLinkStyle())
            }
          }
          .padding(.horizontal, 16)
          ChipGroup(selection: selection, scrollable: true) {
            ForEach(Self.categories) { category in
              Chip(LocalizedStringKey(category.label), value: category.label)
            }
          }
          .contentMargins(.horizontal, 16, for: .scrollContent)
          .accessibilityLabel(Text("Categories"))
          VStack(alignment: .leading, spacing: 18) {
            Text("\(Text("The latest.")) \(Text("Take a look at what's new in \(Text(LocalizedStringKey(current.label))).").foregroundStyle(Color.labelSecondary))")
              .scaledTextStyle(.xl, weight: .semibold)
              .fixedSize(horizontal: false, vertical: true)
              .contentTransition(.opacity)
            Color.control
              .overlay {
                ForEach(Self.categories) { category in
                  Color.clear.overlay {
                    AsyncImage(url: category.image) { phase in
                      if let image = phase.image {
                        image.resizable().scaledToFill()
                      }
                    }
                  }
                  .opacity(category.label == current.label ? 1 : 0)
                }
              }
              .aspectRatio(4 / 3, contentMode: .fit)
              .clipShape(RoundedRectangle(cornerRadius: Radius.xl2, style: .continuous))
              .accessibilityHidden(true)
          }
          .padding(.top, 22)
          .overlay(alignment: .top) {
            Color.separator.frame(height: 1)
          }
          .padding(.horizontal, 16)
        }
        .padding(.top, 4)
        .padding(.bottom, 32)
      } header: {
        Header {
          HeaderTitle("Store")
        }
      }
    }
    .animation(reduceMotion ? nil : .easeOut(duration: 0.3), value: selected)
  }

  private var selection: Binding<String?> {
    Binding(
      get: { selected },
      set: { value in
        guard let value else { return }
        selected = value
        onSelectCategory?(value)
      }
    )
  }
}

private struct NavCategoriesLinkStyle: ButtonStyle {
  func makeBody(configuration: Configuration) -> some View {
    configuration.label
      .scaledFont(.sm)
      .foregroundStyle(Color.link)
      .opacity(configuration.isPressed ? 0.5 : 1)
      .frame(minHeight: 32)
      .contentShape(Rectangle())
  }
}
```

```kt title="kotlin/blocks/NavCategories.kt"
package com.esuiss.ui.blocks

import androidx.compose.foundation.background
import androidx.compose.foundation.clickable
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.interaction.collectIsPressedAsState
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.PaddingValues
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.rememberScrollState
import androidx.compose.foundation.text.BasicText
import androidx.compose.foundation.verticalScroll
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.graphicsLayer
import androidx.compose.ui.graphics.vector.ImageVector
import androidx.compose.ui.semantics.LiveRegionMode
import androidx.compose.ui.semantics.Role
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.heading
import androidx.compose.ui.semantics.liveRegion
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.text.SpanStyle
import androidx.compose.ui.text.buildAnnotatedString
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.withStyle
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.Camera
import com.adamglin.phosphoricons.regular.DeviceMobile
import com.adamglin.phosphoricons.regular.DeviceMobileCamera
import com.adamglin.phosphoricons.regular.DeviceTablet
import com.adamglin.phosphoricons.regular.Headphones
import com.adamglin.phosphoricons.regular.Laptop
import com.adamglin.phosphoricons.regular.Palette
import com.adamglin.phosphoricons.regular.Plug
import com.adamglin.phosphoricons.regular.Sparkle
import com.adamglin.phosphoricons.regular.Watch
import com.esuiss.ui.components.Chip
import com.esuiss.ui.components.ChipGroup
import com.esuiss.ui.components.Screen
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography

private class NavCategory(val label: String, val icon: ImageVector)

private val NavCategoryList = listOf(
    NavCategory("Laptop", PhosphorIcons.Regular.Laptop),
    NavCategory("Phone", PhosphorIcons.Regular.DeviceMobile),
    NavCategory("Pad", PhosphorIcons.Regular.DeviceTablet),
    NavCategory("Watch", PhosphorIcons.Regular.Watch),
    NavCategory("Pods", PhosphorIcons.Regular.Headphones),
    NavCategory("Cases", PhosphorIcons.Regular.DeviceMobileCamera),
    NavCategory("Camera", PhosphorIcons.Regular.Camera),
    NavCategory("Colors", PhosphorIcons.Regular.Palette),
    NavCategory("Pro", PhosphorIcons.Regular.Sparkle),
    NavCategory("Accessories", PhosphorIcons.Regular.Plug),
)

@Composable
fun NavCategories(
    modifier: Modifier = Modifier,
    onSelectCategory: (category: String) -> Unit = {},
    onAskSpecialist: () -> Unit = {},
    onFindStore: () -> Unit = {},
) {
    val colors = EsuissTheme.colors
    var selected by rememberSaveable { mutableStateOf("Phone") }

    Screen(modifier) {
        Column(
            Modifier
                .fillMaxSize()
                .verticalScroll(rememberScrollState())
                .padding(top = 44.dp, bottom = 40.dp),
            verticalArrangement = Arrangement.spacedBy(28.dp),
        ) {
            Column(
                Modifier.padding(horizontal = 24.dp),
                verticalArrangement = Arrangement.spacedBy(20.dp),
            ) {
                Column(verticalArrangement = Arrangement.spacedBy(4.dp)) {
                    BasicText(
                        "Store.",
                        modifier = Modifier.semantics { heading() },
                        style = Typography.xl3.copy(color = colors.label, fontWeight = FontWeight.Bold),
                    )
                    BasicText(
                        "The best way to buy the suiss products you love.",
                        style = Typography.xl.copy(color = colors.labelSecondary),
                    )
                }
                Column(verticalArrangement = Arrangement.spacedBy(6.dp)) {
                    BasicText("Need shopping help?", style = Typography.xs.copy(color = colors.labelSecondary, fontWeight = FontWeight.SemiBold))
                    NavLink("Ask a Specialist ›", onAskSpecialist)
                    NavLink("Visit a suiss Store near you ›", onFindStore)
                }
            }
            ChipGroup(
                value = selected,
                onValueChange = { value ->
                    if (value != null && value != selected) {
                        selected = value
                        onSelectCategory(value)
                    }
                },
                modifier = Modifier
                    .fillMaxWidth()
                    .semantics { contentDescription = "Categories" },
                scrollable = true,
                contentPadding = PaddingValues(horizontal = 24.dp, vertical = 4.dp),
            ) {
                NavCategoryList.forEach { category ->
                    Chip(category.label, category.label, icon = category.icon)
                }
            }
            Column(Modifier.padding(horizontal = 24.dp)) {
                Box(
                    Modifier
                        .fillMaxWidth()
                        .height(1.dp)
                        .background(colors.separator),
                )
                BasicText(
                    buildAnnotatedString {
                        append("The latest. ")
                        withStyle(SpanStyle(color = colors.labelSecondary)) { append("Take a look at what's new in $selected.") }
                    },
                    modifier = Modifier
                        .padding(top = 22.dp)
                        .semantics { liveRegion = LiveRegionMode.Polite },
                    style = Typography.xl2.copy(color = colors.label, fontWeight = FontWeight.SemiBold),
                )
            }
        }
    }
}

@Composable
private fun NavLink(text: String, onClick: () -> Unit) {
    val interaction = remember { MutableInteractionSource() }
    val pressed by interaction.collectIsPressedAsState()
    BasicText(
        text,
        modifier = Modifier
            .graphicsLayer { alpha = if (pressed) 0.5f else 1f }
            .clickable(interactionSource = interaction, indication = null, role = Role.Button, onClick = onClick)
            .padding(vertical = 4.dp),
        style = Typography.sm.copy(color = EsuissTheme.colors.link),
    )
}
```

A store screen with a large heading, links to ask a specialist or find a store, and a scrollable `ChipGroup` of categories, each `Chip` showing a photo and a label. Selecting a category updates the line below it.

## Installation

```bash title="Terminal"
npx @esuiss/uim@latest add nav-categories
```

```bash title="Terminal"
npx @esuiss/uim@latest add nav-categories --platform swift
```

```bash title="Terminal"
npx @esuiss/uim@latest add nav-categories --platform kotlin
```

The CLI also adds what it builds on: [Chip](/docs/components/chip), [Screen](/docs/components/screen), [Text](/docs/components/text).

### Manual

**Uniwind**

1. Install the dependencies:

```bash title="Terminal"
npx expo install react-native-reanimated react-native-worklets
```

2. Add the pieces it builds on: [Chip](/docs/components/chip), [Screen](/docs/components/screen), [Text](/docs/components/text).

3. Copy the source into `components/blocks/nav-categories.tsx`:

```tsx title="uniwind/components/blocks/nav-categories.tsx"
import * as React from "react"
import { Image, Pressable, ScrollView, View } from "react-native"
import { FadeIn, FadeInDown, ReduceMotion } from "react-native-reanimated"
import { AnimatedView } from "@/components/ui/animated-view"
import { Chip, ChipGroup } from "@/components/ui/chip"
import { Screen } from "@/components/ui/screen"
import { Text } from "@/components/ui/text"

const photo = (id: string) =>
  `https://images.unsplash.com/photo-${id}?w=400&q=80&auto=format&fit=crop`

const CATEGORIES = [
  { label: "Laptop", image: photo("1785245560368-f6d715956e5d") },
  { label: "Phone", image: photo("1714578187196-29775454aa39") },
  { label: "Pad", image: photo("1607452263110-39a87c399c50") },
  { label: "Watch", image: photo("1660844817855-3ecc7ef21f12") },
  { label: "Pods", image: photo("1599669454699-248893623440") },
  { label: "Cases", image: photo("1703676311066-34caf2cbee33") },
  { label: "Camera", image: photo("1604677209244-6569d050557a") },
  { label: "Colors", image: photo("1633596683562-4a47eb4983c5") },
  { label: "Pro", image: photo("1760978631841-f3754859ca59") },
  { label: "Accessories", image: photo("1645323927877-3de25b4f819c") },
]

function NavCategories({
  onSelectCategory,
  onAskSpecialist,
  onFindStore,
}: {
  onSelectCategory?: (label: string) => void
  onAskSpecialist?: () => void
  onFindStore?: () => void
}) {
  const [selected, setSelected] = React.useState("Phone")

  return (
    <Screen>
      <ScrollView contentContainerClassName="gap-7 pt-11 pb-10">
        <AnimatedView
          entering={FadeInDown.duration(600).reduceMotion(ReduceMotion.System)}
          className="gap-6 px-5"
        >
          <View className="gap-1">
            <Text role="heading" className="text-3xl font-bold">
              Store.
            </Text>
            <Text className="text-xl text-label-secondary">
              The best way to buy the suiss products you love.
            </Text>
          </View>
          <View className="items-start gap-1.5">
            <Text className="text-xs font-semibold text-label-secondary">
              Need shopping help?
            </Text>
            <Pressable
              role="link"
              hitSlop={6}
              onPress={onAskSpecialist}
              className="active:opacity-60"
            >
              <Text className="text-xs text-link">Ask a Specialist ›</Text>
            </Pressable>
            <Pressable
              role="link"
              hitSlop={6}
              onPress={onFindStore}
              className="active:opacity-60"
            >
              <Text className="text-xs text-link">
                Visit a suiss Store near you ›
              </Text>
            </Pressable>
          </View>
        </AnimatedView>
        <ChipGroup
          scrollable
          value={[selected]}
          onValueChange={(value) => {
            if (!value[0]) return
            setSelected(value[0])
            onSelectCategory?.(value[0])
          }}
          accessibilityLabel="Categories"
          className="px-5"
        >
          {CATEGORIES.map((category) => (
            <Chip
              key={category.label}
              value={category.label}
              accessibilityLabel={category.label}
              className="h-10 gap-2 ps-1 pe-3.5"
            >
              <Image
                source={{ uri: category.image }}
                resizeMode="cover"
                accessibilityIgnoresInvertColors
                className="size-8 rounded-full bg-surface-secondary"
              />
              <Text numberOfLines={1}>{category.label}</Text>
            </Chip>
          ))}
        </ChipGroup>
        <View className="mx-5 border-t border-separator pt-5.5">
          <AnimatedView
            key={selected}
            entering={FadeIn.duration(400).reduceMotion(ReduceMotion.System)}
            accessibilityLiveRegion="polite"
          >
            <Text className="text-2xl font-semibold">
              The latest.{" "}
              <Text className="text-2xl font-semibold text-label-secondary">
                Take a look at what's new in {selected}.
              </Text>
            </Text>
          </AnimatedView>
        </View>
      </ScrollView>
    </Screen>
  )
}

export { NavCategories }
```

4. Update the import paths to match your project.

**NativeWind**

1. Install the dependencies:

```bash title="Terminal"
npx expo install react-native-reanimated react-native-worklets
```

2. Add the pieces it builds on: [Chip](/docs/components/chip), [Screen](/docs/components/screen), [Text](/docs/components/text).

3. Copy the source into `components/blocks/nav-categories.tsx`:

```tsx title="nativewind/components/blocks/nav-categories.tsx"
import * as React from "react"
import { Image, Pressable, ScrollView, View } from "react-native"
import { FadeIn, FadeInDown, ReduceMotion } from "react-native-reanimated"
import { AnimatedView } from "@/components/ui/animated-view"
import { Chip, ChipGroup } from "@/components/ui/chip"
import { Screen } from "@/components/ui/screen"
import { Text } from "@/components/ui/text"

const photo = (id: string) =>
  `https://images.unsplash.com/photo-${id}?w=400&q=80&auto=format&fit=crop`

const CATEGORIES = [
  { label: "Laptop", image: photo("1785245560368-f6d715956e5d") },
  { label: "Phone", image: photo("1714578187196-29775454aa39") },
  { label: "Pad", image: photo("1607452263110-39a87c399c50") },
  { label: "Watch", image: photo("1660844817855-3ecc7ef21f12") },
  { label: "Pods", image: photo("1599669454699-248893623440") },
  { label: "Cases", image: photo("1703676311066-34caf2cbee33") },
  { label: "Camera", image: photo("1604677209244-6569d050557a") },
  { label: "Colors", image: photo("1633596683562-4a47eb4983c5") },
  { label: "Pro", image: photo("1760978631841-f3754859ca59") },
  { label: "Accessories", image: photo("1645323927877-3de25b4f819c") },
]

function NavCategories({
  onSelectCategory,
  onAskSpecialist,
  onFindStore,
}: {
  onSelectCategory?: (label: string) => void
  onAskSpecialist?: () => void
  onFindStore?: () => void
}) {
  const [selected, setSelected] = React.useState("Phone")

  return (
    <Screen>
      <ScrollView contentContainerClassName="gap-7 pt-11 pb-10">
        <AnimatedView
          entering={FadeInDown.duration(600).reduceMotion(ReduceMotion.System)}
          className="gap-6 px-5"
        >
          <View className="gap-1">
            <Text role="heading" className="text-3xl font-bold">
              Store.
            </Text>
            <Text className="text-xl text-label-secondary">
              The best way to buy the suiss products you love.
            </Text>
          </View>
          <View className="items-start gap-1.5">
            <Text className="text-xs font-semibold text-label-secondary">
              Need shopping help?
            </Text>
            <Pressable
              role="link"
              hitSlop={6}
              onPress={onAskSpecialist}
              className="active:opacity-60"
            >
              <Text className="text-xs text-link">Ask a Specialist ›</Text>
            </Pressable>
            <Pressable
              role="link"
              hitSlop={6}
              onPress={onFindStore}
              className="active:opacity-60"
            >
              <Text className="text-xs text-link">
                Visit a suiss Store near you ›
              </Text>
            </Pressable>
          </View>
        </AnimatedView>
        <ChipGroup
          scrollable
          value={[selected]}
          onValueChange={(value) => {
            if (!value[0]) return
            setSelected(value[0])
            onSelectCategory?.(value[0])
          }}
          accessibilityLabel="Categories"
          className="px-5"
        >
          {CATEGORIES.map((category) => (
            <Chip
              key={category.label}
              value={category.label}
              accessibilityLabel={category.label}
              className="h-10 gap-2 ps-1 pe-3.5"
            >
              <Image
                source={{ uri: category.image }}
                resizeMode="cover"
                accessibilityIgnoresInvertColors
                className="size-8 rounded-full bg-surface-secondary"
              />
              <Text numberOfLines={1}>{category.label}</Text>
            </Chip>
          ))}
        </ChipGroup>
        <View className="mx-5 border-t border-separator pt-[1.375rem]">
          <AnimatedView
            key={selected}
            entering={FadeIn.duration(400).reduceMotion(ReduceMotion.System)}
            accessibilityLiveRegion="polite"
          >
            <Text className="text-2xl font-semibold">
              The latest.{" "}
              <Text className="text-2xl font-semibold text-label-secondary">
                Take a look at what's new in {selected}.
              </Text>
            </Text>
          </AnimatedView>
        </View>
      </ScrollView>
    </Screen>
  )
}

export { NavCategories }
```

4. Update the import paths to match your project.

**StyleSheet**

1. Install the dependencies:

```bash title="Terminal"
npx expo install react-native-reanimated react-native-worklets
```

2. Add the pieces it builds on: [Chip](/docs/components/chip), [Screen](/docs/components/screen), [Text](/docs/components/text).

3. Copy the source into `components/blocks/nav-categories.tsx`:

```tsx title="stylesheet/components/blocks/nav-categories.tsx"
import * as React from "react"
import { Image, Pressable, ScrollView, StyleSheet, View } from "react-native"
import { FadeIn, FadeInDown, ReduceMotion } from "react-native-reanimated"
import { AnimatedView } from "@/components/ui/animated-view"
import { Chip, ChipGroup } from "@/components/ui/chip"
import { Screen } from "@/components/ui/screen"
import { Text } from "@/components/ui/text"
import { fontSize, radius, useTheme } from "@/components/ui/theme"

const photo = (id: string) =>
  `https://images.unsplash.com/photo-${id}?w=400&q=80&auto=format&fit=crop`

const CATEGORIES = [
  { label: "Laptop", image: photo("1785245560368-f6d715956e5d") },
  { label: "Phone", image: photo("1714578187196-29775454aa39") },
  { label: "Pad", image: photo("1607452263110-39a87c399c50") },
  { label: "Watch", image: photo("1660844817855-3ecc7ef21f12") },
  { label: "Pods", image: photo("1599669454699-248893623440") },
  { label: "Cases", image: photo("1703676311066-34caf2cbee33") },
  { label: "Camera", image: photo("1604677209244-6569d050557a") },
  { label: "Colors", image: photo("1633596683562-4a47eb4983c5") },
  { label: "Pro", image: photo("1760978631841-f3754859ca59") },
  { label: "Accessories", image: photo("1645323927877-3de25b4f819c") },
]

const styles = StyleSheet.create({
  content: { gap: 28, paddingTop: 44, paddingBottom: 40 },
  intro: { gap: 24, paddingHorizontal: 20 },
  titles: { gap: 4 },
  title: { ...fontSize["3xl"], fontWeight: "700" },
  subtitle: { ...fontSize.xl },
  help: { alignItems: "flex-start", gap: 6 },
  helpTitle: { ...fontSize.xs, fontWeight: "600" },
  link: { ...fontSize.xs },
  chips: { paddingHorizontal: 20 },
  chip: { height: 40, gap: 8, paddingStart: 4, paddingEnd: 14 },
  image: { width: 32, height: 32, borderRadius: radius.full },
  latest: {
    marginHorizontal: 20,
    borderTopWidth: StyleSheet.hairlineWidth,
    paddingTop: 22,
  },
  latestText: { ...fontSize["2xl"], fontWeight: "600" },
})

function NavCategories({
  onSelectCategory,
  onAskSpecialist,
  onFindStore,
}: {
  onSelectCategory?: (label: string) => void
  onAskSpecialist?: () => void
  onFindStore?: () => void
}) {
  const { colors } = useTheme()
  const [selected, setSelected] = React.useState("Phone")

  return (
    <Screen>
      <ScrollView contentContainerStyle={styles.content}>
        <AnimatedView
          entering={FadeInDown.duration(600).reduceMotion(ReduceMotion.System)}
          style={styles.intro}
        >
          <View style={styles.titles}>
            <Text role="heading" style={styles.title}>
              Store.
            </Text>
            <Text style={[styles.subtitle, { color: colors.labelSecondary }]}>
              The best way to buy the suiss products you love.
            </Text>
          </View>
          <View style={styles.help}>
            <Text style={[styles.helpTitle, { color: colors.labelSecondary }]}>
              Need shopping help?
            </Text>
            <Pressable
              role="link"
              hitSlop={6}
              onPress={onAskSpecialist}
              style={({ pressed }) => pressed && { opacity: 0.6 }}
            >
              <Text style={[styles.link, { color: colors.link }]}>
                Ask a Specialist ›
              </Text>
            </Pressable>
            <Pressable
              role="link"
              hitSlop={6}
              onPress={onFindStore}
              style={({ pressed }) => pressed && { opacity: 0.6 }}
            >
              <Text style={[styles.link, { color: colors.link }]}>
                Visit a suiss Store near you ›
              </Text>
            </Pressable>
          </View>
        </AnimatedView>
        <ChipGroup
          scrollable
          value={[selected]}
          onValueChange={(value) => {
            if (!value[0]) return
            setSelected(value[0])
            onSelectCategory?.(value[0])
          }}
          accessibilityLabel="Categories"
          style={styles.chips}
        >
          {CATEGORIES.map((category) => (
            <Chip
              key={category.label}
              value={category.label}
              accessibilityLabel={category.label}
              style={styles.chip}
            >
              <Image
                source={{ uri: category.image }}
                resizeMode="cover"
                accessibilityIgnoresInvertColors
                style={[
                  styles.image,
                  { backgroundColor: colors.surfaceSecondary },
                ]}
              />
              <Text numberOfLines={1}>{category.label}</Text>
            </Chip>
          ))}
        </ChipGroup>
        <View style={[styles.latest, { borderTopColor: colors.separator }]}>
          <AnimatedView
            key={selected}
            entering={FadeIn.duration(400).reduceMotion(ReduceMotion.System)}
            accessibilityLiveRegion="polite"
          >
            <Text style={styles.latestText}>
              The latest.{" "}
              <Text
                style={[styles.latestText, { color: colors.labelSecondary }]}
              >
                Take a look at what's new in {selected}.
              </Text>
            </Text>
          </AnimatedView>
        </View>
      </ScrollView>
    </Screen>
  )
}

export { NavCategories }
```

4. Update the import paths to match your project.

**SwiftUI**

1. Target iOS 17 or later.

2. Add the Swift package to your app:

```swift title="Package.swift"
.package(url: "https://github.com/phosphor-icons/swift", from: "2.1.0")
```

3. Copy the theme files every view uses:

```swift title="swift/Theme/Theme.swift"
import SwiftUI
import UIKit

struct RGBA: Sendable {
  let red: CGFloat
  let green: CGFloat
  let blue: CGFloat
  let alpha: CGFloat

  init(_ hex: UInt32, _ alpha: CGFloat = 1) {
    red = CGFloat((hex >> 16) & 0xFF) / 255
    green = CGFloat((hex >> 8) & 0xFF) / 255
    blue = CGFloat(hex & 0xFF) / 255
    self.alpha = alpha
  }

  var uiColor: UIColor {
    UIColor(red: red, green: green, blue: blue, alpha: alpha)
  }
}

extension Color {
  static func adaptive(light: RGBA, dark: RGBA) -> Color {
    let lightColor = light.uiColor
    let darkColor = dark.uiColor
    return Color(uiColor: UIColor { traits in
      traits.userInterfaceStyle == .dark ? darkColor : lightColor
    })
  }
}

public struct TextStyle: Sendable, Hashable {
  public let size: CGFloat
  public let lineHeight: CGFloat
  public let letterSpacing: CGFloat

  public init(size: CGFloat, lineHeight: CGFloat, letterSpacing: CGFloat) {
    self.size = size
    self.lineHeight = lineHeight
    self.letterSpacing = letterSpacing
  }

  public func font(weight: Font.Weight = .regular) -> Font {
    .system(size: size, weight: weight)
  }

  public var lineSpacing: CGFloat {
    max(0, lineHeight - UIFont.systemFont(ofSize: size).lineHeight)
  }
}

extension Hashable where Self == Font {
  public static func textStyle(_ style: TextStyle, weight: Font.Weight = .regular) -> Font {
    style.font(weight: weight)
  }
}

private struct TextStyleModifier: ViewModifier {
  let style: TextStyle
  let weight: Font.Weight

  func body(content: Content) -> some View {
    content
      .font(style.font(weight: weight))
      .tracking(style.letterSpacing)
      .lineSpacing(style.lineSpacing)
      .padding(.vertical, style.lineSpacing / 2)
  }
}

extension View {
  public func textStyle(_ style: TextStyle, weight: Font.Weight = .regular) -> some View {
    modifier(TextStyleModifier(style: style, weight: weight))
  }
}

public struct Shadow: Sendable, Hashable {
  public let color: Color
  public let radius: CGFloat
  public let x: CGFloat
  public let y: CGFloat

  public init(color: Color, radius: CGFloat, x: CGFloat = 0, y: CGFloat = 0) {
    self.color = color
    self.radius = radius
    self.x = x
    self.y = y
  }
}

extension View {
  public func shadow(_ shadow: Shadow) -> some View {
    self.shadow(color: shadow.color, radius: shadow.radius, x: shadow.x, y: shadow.y)
  }
}
```

```swift title="swift/Theme/Tokens.swift"
import SwiftUI

extension Color {
  public static let surface = Color.adaptive(light: .init(0xFFFFFF), dark: .init(0x000000))
  public static let surfaceSecondary = Color.adaptive(light: .init(0xF5F5F7), dark: .init(0x161617))
  public static let surfaceTertiary = Color.adaptive(light: .init(0xE8E8ED), dark: .init(0x2C2C2E))
  public static let surfaceRaised = Color.adaptive(light: .init(0xFFFFFF), dark: .init(0x1D1D1F))
  public static let label = Color.adaptive(light: .init(0x1D1D1F), dark: .init(0xF5F5F7))
  public static let labelSecondary = Color.adaptive(light: .init(0x6E6E73), dark: .init(0xA1A1A6))
  public static let labelTertiary = Color.adaptive(light: .init(0x86868B), dark: .init(0x86868B))
  public static let labelQuaternary = Color.adaptive(light: .init(0xD2D2D7), dark: .init(0x424245))
  public static let control = Color.adaptive(light: .init(0x000000, 0.04), dark: .init(0xFFFFFF, 0.1))
  public static let controlPressed = Color.adaptive(light: .init(0x000000, 0.12), dark: .init(0xFFFFFF, 0.22))
  public static let controlSelected = Color.adaptive(light: .init(0x1D1D1F), dark: .init(0xF5F5F7))
  public static let controlDisabled = Color.adaptive(light: .init(0x000000, 0.03), dark: .init(0xFFFFFF, 0.05))
  public static let onControlSelected = Color.adaptive(light: .init(0xFFFFFF), dark: .init(0x000000))
  public static let itemPressed = Color.adaptive(light: .init(0x000000, 0.08), dark: .init(0xFFFFFF, 0.12))
  public static let itemSelected = Color.adaptive(light: .init(0x000000, 0.06), dark: .init(0xFFFFFF, 0.1))
  public static let separator = Color.adaptive(light: .init(0xD2D2D7), dark: .init(0x424245))
  public static let separatorStrong = Color.adaptive(light: .init(0x86868B), dark: .init(0x6E6E73))
  public static let accent = Color.adaptive(light: .init(0x0071E3), dark: .init(0x0071E3))
  public static let accentPressed = Color.adaptive(light: .init(0x005BB8), dark: .init(0x004D9E))
  public static let accentSelected = Color.adaptive(light: .init(0x0071E3), dark: .init(0x0071E3))
  public static let accentDisabled = Color.adaptive(light: .init(0x0071E3, 0.4), dark: .init(0x0071E3, 0.4))
  public static let onAccent = Color.adaptive(light: .init(0xFFFFFF), dark: .init(0xFFFFFF))
  public static let accentSurface = Color.adaptive(light: .init(0x0071E3, 0.09), dark: .init(0x0071E3, 0.18))
  public static let accentSurfacePressed = Color.adaptive(light: .init(0x0071E3, 0.18), dark: .init(0x0071E3, 0.3))
  public static let link = Color.adaptive(light: .init(0x0066CC), dark: .init(0x2997FF))
  public static let focus = Color.adaptive(light: .init(0x0071E3), dark: .init(0x0071E3))
  public static let scrim = Color.adaptive(light: .init(0x000000, 0.48), dark: .init(0x000000, 0.48))
  public static let media = Color.adaptive(light: .init(0x000000), dark: .init(0x000000))
  public static let onMedia = Color.adaptive(light: .init(0xFFFFFF), dark: .init(0xFFFFFF))
  public static let danger = Color.adaptive(light: .init(0xD0000A), dark: .init(0xFF5447))
  public static let dangerSurface = Color.adaptive(light: .init(0xD70015, 0.08), dark: .init(0xFF453A, 0.2))
  public static let dangerSurfacePressed = Color.adaptive(light: .init(0xD70015, 0.16), dark: .init(0xFF453A, 0.36))
  public static let success = Color.adaptive(light: .init(0x008009), dark: .init(0x30D158))
  public static let successSurface = Color.adaptive(light: .init(0xEFFAF1), dark: .init(0x30D158, 0.16))
  public static let warning = Color.adaptive(light: .init(0xB64400), dark: .init(0xFF9F0A))
  public static let warningSurface = Color.adaptive(light: .init(0xFFF5EA), dark: .init(0xFF9F0A, 0.16))
}

public enum Radius {
  public static let xs: CGFloat = 3
  public static let sm: CGFloat = 5
  public static let md: CGFloat = 8
  public static let lg: CGFloat = 10
  public static let xl: CGFloat = 12
  public static let xl2: CGFloat = 18
  public static let xl3: CGFloat = 28
  public static let full: CGFloat = 9999
}

extension TextStyle {
  public static let xs3 = TextStyle(size: 11, lineHeight: 13, letterSpacing: 0.066)
  public static let xs2 = TextStyle(size: 12, lineHeight: 16, letterSpacing: 0)
  public static let xs = TextStyle(size: 13, lineHeight: 18, letterSpacing: -0.078)
  public static let sm = TextStyle(size: 15, lineHeight: 20, letterSpacing: -0.24)
  public static let md = TextStyle(size: 16, lineHeight: 21, letterSpacing: -0.32)
  public static let base = TextStyle(size: 17, lineHeight: 22, letterSpacing: -0.442)
  public static let lg = TextStyle(size: 20, lineHeight: 25, letterSpacing: -0.46)
  public static let xl = TextStyle(size: 22, lineHeight: 28, letterSpacing: -0.264)
  public static let xl2 = TextStyle(size: 28, lineHeight: 34, letterSpacing: 0.392)
  public static let xl3 = TextStyle(size: 34, lineHeight: 41, letterSpacing: 0.408)

  public static let allCases: [TextStyle] = [.xs3, .xs2, .xs, .sm, .md, .base, .lg, .xl, .xl2, .xl3]
}

extension Shadow {
  public static let md = Shadow(color: .black.opacity(0.08), radius: 6, x: 2, y: 4)
  public static let lg = Shadow(color: .black.opacity(0.12), radius: 12, y: 4)
}
```

4. Copy the source and every file it uses:

```swift title="swift/Blocks/NavCategories.swift"
import PhosphorSwift
import SwiftUI

public struct NavCategories: View {
  struct Category: Identifiable {
    let label: String
    let image: URL?

    var id: String { label }
  }

  static func photo(_ id: String) -> URL? {
    URL(string: "https://images.unsplash.com/photo-\(id)?w=400&q=80&auto=format&fit=crop")
  }

  static var categories: [Category] {
    [
      Category(label: "Laptop", image: photo("1785245560368-f6d715956e5d")),
      Category(label: "Phone", image: photo("1714578187196-29775454aa39")),
      Category(label: "Pad", image: photo("1607452263110-39a87c399c50")),
      Category(label: "Watch", image: photo("1660844817855-3ecc7ef21f12")),
      Category(label: "Pods", image: photo("1599669454699-248893623440")),
      Category(label: "Cases", image: photo("1703676311066-34caf2cbee33")),
      Category(label: "Camera", image: photo("1604677209244-6569d050557a")),
      Category(label: "Colors", image: photo("1633596683562-4a47eb4983c5")),
      Category(label: "Pro", image: photo("1760978631841-f3754859ca59")),
      Category(label: "Accessories", image: photo("1645323927877-3de25b4f819c")),
    ]
  }

  private var onSelectCategory: ((String) -> Void)?
  private var onAskSpecialist: (() -> Void)?
  private var onFindStore: (() -> Void)?
  @State private var selected: String?
  @Environment(\.accessibilityReduceMotion) private var reduceMotion

  public init(
    onSelectCategory: ((_ category: String) -> Void)? = nil,
    onAskSpecialist: (() -> Void)? = nil,
    onFindStore: (() -> Void)? = nil
  ) {
    self.init(selected: "Phone")
    self.onSelectCategory = onSelectCategory
    self.onAskSpecialist = onAskSpecialist
    self.onFindStore = onFindStore
  }

  init(selected: String) {
    _selected = State(initialValue: selected)
  }

  public var body: some View {
    let current = Self.categories.first { $0.label == selected } ?? Self.categories[1]
    Screen {
      HeaderScrollView {
        HeaderLargeTitle("Store.")
        VStack(alignment: .leading, spacing: 28) {
          VStack(alignment: .leading, spacing: 20) {
            Text("The best way to buy the suiss products you love.")
              .scaledTextStyle(.xl)
              .foregroundStyle(Color.labelSecondary)
              .fixedSize(horizontal: false, vertical: true)
            VStack(alignment: .leading, spacing: 0) {
              Text("Need shopping help?")
                .scaledFont(.xs, weight: .semibold)
                .foregroundStyle(Color.labelSecondary)
              Button("Ask a Specialist ›") { onAskSpecialist?() }
                .buttonStyle(NavCategoriesLinkStyle())
              Button("Visit a suiss Store near you ›") { onFindStore?() }
                .buttonStyle(NavCategoriesLinkStyle())
            }
          }
          .padding(.horizontal, 16)
          ChipGroup(selection: selection, scrollable: true) {
            ForEach(Self.categories) { category in
              Chip(LocalizedStringKey(category.label), value: category.label)
            }
          }
          .contentMargins(.horizontal, 16, for: .scrollContent)
          .accessibilityLabel(Text("Categories"))
          VStack(alignment: .leading, spacing: 18) {
            Text("\(Text("The latest.")) \(Text("Take a look at what's new in \(Text(LocalizedStringKey(current.label))).").foregroundStyle(Color.labelSecondary))")
              .scaledTextStyle(.xl, weight: .semibold)
              .fixedSize(horizontal: false, vertical: true)
              .contentTransition(.opacity)
            Color.control
              .overlay {
                ForEach(Self.categories) { category in
                  Color.clear.overlay {
                    AsyncImage(url: category.image) { phase in
                      if let image = phase.image {
                        image.resizable().scaledToFill()
                      }
                    }
                  }
                  .opacity(category.label == current.label ? 1 : 0)
                }
              }
              .aspectRatio(4 / 3, contentMode: .fit)
              .clipShape(RoundedRectangle(cornerRadius: Radius.xl2, style: .continuous))
              .accessibilityHidden(true)
          }
          .padding(.top, 22)
          .overlay(alignment: .top) {
            Color.separator.frame(height: 1)
          }
          .padding(.horizontal, 16)
        }
        .padding(.top, 4)
        .padding(.bottom, 32)
      } header: {
        Header {
          HeaderTitle("Store")
        }
      }
    }
    .animation(reduceMotion ? nil : .easeOut(duration: 0.3), value: selected)
  }

  private var selection: Binding<String?> {
    Binding(
      get: { selected },
      set: { value in
        guard let value else { return }
        selected = value
        onSelectCategory?(value)
      }
    )
  }
}

private struct NavCategoriesLinkStyle: ButtonStyle {
  func makeBody(configuration: Configuration) -> some View {
    configuration.label
      .scaledFont(.sm)
      .foregroundStyle(Color.link)
      .opacity(configuration.isPressed ? 0.5 : 1)
      .frame(minHeight: 32)
      .contentShape(Rectangle())
  }
}
```

```swift title="swift/Components/Button.swift"
import SwiftUI

public struct VariantButtonStyle: ButtonStyle {
  public enum Variant: CaseIterable, Sendable {
    case `default`, outline, secondary, tinted, ghost, plain, destructive, link
  }

  public enum Size: CaseIterable, Sendable {
    case `default`, xs, sm, lg, xl, icon, iconXs, iconSm, iconLg, iconXl

    var height: CGFloat {
      switch self {
      case .xs, .iconXs: 24
      case .sm, .iconSm: 32
      case .default, .icon: 36
      case .lg, .iconLg: 44
      case .xl, .iconXl: 56
      }
    }

    var horizontalPadding: CGFloat {
      switch self {
      case .xs: 11
      case .sm: 12
      case .default: 16
      case .lg: 22
      case .xl: 31
      case .icon, .iconXs, .iconSm, .iconLg, .iconXl: 0
      }
    }

    var spacing: CGFloat {
      switch self {
      case .xs, .sm, .iconXs, .iconSm: 4
      case .xl, .iconXl: 8
      default: 6
      }
    }

    var textStyle: TextStyle {
      switch self {
      case .xs, .iconXs: .xs2
      case .lg, .xl: .base
      default: .sm
      }
    }

    public var iconSize: CGFloat {
      switch self {
      case .xs, .iconXs: 12
      default: 16
      }
    }

    var blockRadius: CGFloat {
      switch self {
      case .xs, .iconXs: Radius.sm
      case .lg, .iconLg: Radius.lg
      case .xl, .iconXl: Radius.xl
      default: Radius.md
      }
    }

    var isIcon: Bool {
      switch self {
      case .icon, .iconXs, .iconSm, .iconLg, .iconXl: true
      default: false
      }
    }
  }

  let variant: Variant
  let size: Size
  let block: Bool
  var metrics: ButtonMetrics?

  public init(_ variant: Variant = .default, size: Size = .default, block: Bool = false) {
    self.variant = variant
    self.size = size
    self.block = block
  }

  init(_ variant: Variant, size: Size, metrics: ButtonMetrics) {
    self.variant = variant
    self.size = size
    self.block = false
    self.metrics = metrics
  }

  public func makeBody(configuration: Configuration) -> some View {
    StyledButton(configuration: configuration, variant: variant, size: size, block: block, metrics: metrics)
  }
}

struct ButtonMetrics: Sendable {
  var horizontalPadding: CGFloat
  var spacing: CGFloat
  var iconSize: CGFloat
  var textStyle: TextStyle
}

private struct StyledButton: View {
  let configuration: ButtonStyleConfiguration
  let variant: VariantButtonStyle.Variant
  let size: VariantButtonStyle.Size
  let block: Bool
  let metrics: ButtonMetrics?

  @Environment(\.colorScheme) private var colorScheme
  @Environment(\.isEnabled) private var isEnabled
  @Environment(\.buttonGroup) private var group

  var body: some View {
    let joined = group != nil && variant != .ghost && variant != .plain
    let rounded = RoundedRectangle(
      cornerRadius: block ? size.blockRadius : Radius.full,
      style: .continuous
    )
    let shape = joined ? AnyShape(Rectangle()) : AnyShape(rounded)
    configuration.label
      .labelStyle(ButtonLabelStyle(spacing: metrics?.spacing ?? size.spacing, iconSize: metrics?.iconSize ?? size.iconSize))
    .font((metrics?.textStyle ?? size.textStyle).font())
    .tracking((metrics?.textStyle ?? size.textStyle).letterSpacing)
    .underline(variant == .link && pressed && isEnabled)
    .lineLimit(1)
    .foregroundStyle(foreground)
    .padding(.horizontal, metrics?.horizontalPadding ?? size.horizontalPadding)
    .frame(width: size.isIcon && !block ? size.height : nil, height: size.height)
    .frame(maxWidth: block || group == .vertical ? .infinity : nil)
    .background(background, in: shape)
    .overlay {
      if variant == .outline && !joined {
        rounded.strokeBorder(Color.separator)
      }
    }
    .contentShape(shape)
    .anchorPreference(key: ButtonGroupFramesKey.self, value: .bounds) { anchor in
      joined ? [ButtonGroupFrame(bounds: anchor, outlined: variant == .outline)] : []
    }
  }

  private var isDark: Bool { colorScheme == .dark }
  private var pressed: Bool { configuration.isPressed }

  private var foreground: Color {
    switch variant {
    case .default:
      .onAccent
    case .outline, .secondary, .ghost:
      isEnabled ? .label : .labelQuaternary
    case .tinted, .plain:
      isEnabled ? .link : .link.opacity(0.4)
    case .destructive:
      isEnabled ? .danger : .danger.opacity(0.4)
    case .link:
      isEnabled ? .link : .labelQuaternary
    }
  }

  private var background: Color {
    switch variant {
    case .default:
      !isEnabled ? .accentDisabled : pressed ? .accentPressed : .accent
    case .outline:
      isEnabled && pressed ? .itemPressed : isDark ? .clear : .surface
    case .secondary:
      !isEnabled ? .controlDisabled : pressed ? .controlPressed : .control
    case .tinted:
      isEnabled && pressed ? .accentSurfacePressed : .accentSurface
    case .ghost:
      isEnabled && pressed ? .itemPressed : .clear
    case .plain:
      isEnabled && pressed ? .itemPressed : .clear
    case .destructive:
      isEnabled && pressed ? .dangerSurfacePressed : .dangerSurface
    case .link:
      .clear
    }
  }
}

struct ButtonLabelStyle: LabelStyle {
  let spacing: CGFloat
  let iconSize: CGFloat

  func makeBody(configuration: Configuration) -> some View {
    HStack(spacing: spacing) {
      configuration.icon
        .frame(width: iconSize, height: iconSize)
      configuration.title
    }
  }
}

extension ButtonStyle where Self == VariantButtonStyle {
  public static func variant(
    _ variant: VariantButtonStyle.Variant = .default,
    size: VariantButtonStyle.Size = .default,
    block: Bool = false
  ) -> VariantButtonStyle {
    VariantButtonStyle(variant, size: size, block: block)
  }
}
```

```swift title="swift/Components/ButtonGroup.swift"
import SwiftUI

extension EnvironmentValues {
  @Entry var buttonGroup: Axis? = nil
  @Entry var buttonGroupSize: CGSize = .zero
}

enum ButtonGroupSpace: Hashable {
  case group
}

struct ButtonGroupFrame {
  let bounds: Anchor<CGRect>
  let outlined: Bool
}

struct ButtonGroupFramesKey: PreferenceKey {
  static var defaultValue: [ButtonGroupFrame] { [] }

  static func reduce(value: inout [ButtonGroupFrame], nextValue: () -> [ButtonGroupFrame]) {
    value.append(contentsOf: nextValue())
  }
}

struct ButtonGroupNestedKey: PreferenceKey {
  static var defaultValue: Bool { false }

  static func reduce(value: inout Bool, nextValue: () -> Bool) {
    value = value || nextValue()
  }
}

public struct ButtonGroup<Content: View>: View {
  let orientation: Axis
  let content: Content

  @State private var nested = false
  @State private var size: CGSize = .zero

  public init(orientation: Axis = .horizontal, @ViewBuilder content: () -> Content) {
    self.orientation = orientation
    self.content = content()
  }

  public var body: some View {
    let shape = orientation == .horizontal
      ? AnyShape(Capsule())
      : AnyShape(RoundedRectangle(cornerRadius: Radius.xl2, style: .continuous))
    stack
      .coordinateSpace(.named(ButtonGroupSpace.group))
      .onGeometryChange(for: CGSize.self) { $0.size } action: { size = $0 }
      .environment(\.buttonGroup, nested ? nil : orientation)
      .environment(\.buttonGroupSize, size)
      .onPreferenceChange(ButtonGroupNestedKey.self) { nested = $0 }
      .modifier(ButtonGroupClip(shape: nested ? nil : shape))
      .overlayPreferenceValue(ButtonGroupFramesKey.self) { frames in
        if !nested {
          GeometryReader { proxy in
            outline(frames.map { (proxy[$0.bounds], $0.outlined) }, shape: shape)
          }
        }
      }
      .transformPreference(ButtonGroupFramesKey.self) { $0 = [] }
      .transformPreference(ButtonGroupNestedKey.self) { $0 = true }
      .fixedSize(horizontal: orientation == .vertical, vertical: orientation == .horizontal)
      .accessibilityElement(children: .contain)
  }

  @ViewBuilder private var stack: some View {
    switch orientation {
    case .horizontal:
      HStack(spacing: nested ? 8 : 0) { content }
    case .vertical:
      VStack(spacing: nested ? 8 : 0) { content }
    }
  }

  @ViewBuilder private func outline(_ frames: [(CGRect, Bool)], shape: AnyShape) -> some View {
    if frames.contains(where: \.1) {
      ZStack(alignment: .topLeading) {
        shape
          .stroke(Color.separator, lineWidth: 1)
          .padding(0.5)
          .mask {
            Path { path in
              for (rect, outlined) in frames where outlined {
                path.addRect(rect)
              }
            }
          }
        ForEach(Array(frames.dropLast().enumerated()), id: \.offset) { _, frame in
          if frame.1 {
            divider(frame.0)
          }
        }
      }
      .clipShape(shape)
      .allowsHitTesting(false)
    }
  }

  private func divider(_ rect: CGRect) -> some View {
    let horizontal = orientation == .horizontal
    return Rectangle()
      .fill(Color.separator)
      .frame(width: horizontal ? 1 : rect.width, height: horizontal ? rect.height : 1)
      .position(
        x: horizontal ? rect.maxX - 0.5 : rect.midX,
        y: horizontal ? rect.midY : rect.maxY - 0.5
      )
  }
}

struct ButtonGroupItem<Content: View>: View {
  let radius: CGFloat
  let content: (UnevenRoundedRectangle) -> Content

  @State private var frame: CGRect = .zero
  @Environment(\.buttonGroup) private var group
  @Environment(\.buttonGroupSize) private var groupSize

  init(radius: CGFloat, @ViewBuilder content: @escaping (UnevenRoundedRectangle) -> Content) {
    self.radius = radius
    self.content = content
  }

  var body: some View {
    if let group {
      content(shape(group))
        .onGeometryChange(for: CGRect.self) { $0.frame(in: .named(ButtonGroupSpace.group)) } action: { frame = $0 }
    } else {
      content(UnevenRoundedRectangle(cornerRadii: RectangleCornerRadii(
        topLeading: radius,
        bottomLeading: radius,
        bottomTrailing: radius,
        topTrailing: radius
      ), style: .continuous))
    }
  }

  private func shape(_ group: Axis) -> UnevenRoundedRectangle {
    let horizontal = group == .horizontal
    let first = horizontal ? frame.minX <= 0.5 : frame.minY <= 0.5
    let last = horizontal
      ? frame.maxX >= groupSize.width - 0.5
      : frame.maxY >= groupSize.height - 0.5
    let round = horizontal ? frame.height / 2 : Radius.xl2
    let start: CGFloat = first ? round : 0
    let end: CGFloat = last ? round : 0
    let radii = horizontal
      ? RectangleCornerRadii(topLeading: start, bottomLeading: start, bottomTrailing: end, topTrailing: end)
      : RectangleCornerRadii(topLeading: start, bottomLeading: end, bottomTrailing: end, topTrailing: start)
    return UnevenRoundedRectangle(cornerRadii: radii, style: .continuous)
  }
}

private struct ButtonGroupClip: ViewModifier {
  let shape: AnyShape?

  func body(content: Content) -> some View {
    if let shape {
      content.clipShape(shape)
    } else {
      content
    }
  }
}

public struct ButtonGroupText<Content: View>: View {
  let content: Content

  @Environment(\.buttonGroup) private var group

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    let shape = group == nil ? AnyShape(Capsule()) : AnyShape(Rectangle())
    HStack(spacing: 8) {
      content
    }
    .labelStyle(ButtonLabelStyle(spacing: 8, iconSize: 16))
    .scaledFont(.sm)
    .lineLimit(1)
    .foregroundStyle(Color.label)
    .padding(.horizontal, 10)
    .frame(minHeight: 36)
    .frame(maxWidth: group == .vertical ? .infinity : nil, maxHeight: group == .horizontal ? .infinity : nil)
    .background(Color.control, in: shape)
    .anchorPreference(key: ButtonGroupFramesKey.self, value: .bounds) { anchor in
      group == nil ? [] : [ButtonGroupFrame(bounds: anchor, outlined: false)]
    }
  }
}

extension ButtonGroupText where Content == Text {
  public init(_ title: LocalizedStringKey) {
    self.init { Text(title) }
  }

  public init(verbatim title: String) {
    self.init { Text(verbatim: title) }
  }
}

public struct ButtonGroupSeparator: View {
  let orientation: Axis

  public init(_ orientation: Axis = .vertical) {
    self.orientation = orientation
  }

  public var body: some View {
    let vertical = orientation == .vertical
    Rectangle()
      .fill(Color.label.opacity(0.2))
      .frame(width: vertical ? 1 : nil, height: vertical ? nil : 1)
      .padding(vertical ? .vertical : .horizontal, 9)
      .frame(maxWidth: vertical ? nil : .infinity, maxHeight: vertical ? .infinity : nil)
      .padding(vertical ? .trailing : .bottom, -1)
      .zIndex(1)
      .accessibilityHidden(true)
  }
}
```

```swift title="swift/Components/Checkbox.swift"
import PhosphorSwift
import SwiftUI

extension Shadow {
  static let control = Shadow(color: .black.opacity(0.08), radius: 0.5, y: 0.5)
  static let thumb = Shadow(color: .black.opacity(0.12), radius: 1.5, y: 1)
}

struct SelectionIndicator<Mark: View>: View {
  let checked: Bool
  let pressed: Bool
  let cornerRadius: CGFloat
  let mark: Mark

  @Environment(\.isEnabled) private var isEnabled
  @Environment(\.isInvalid) private var invalid
  @Environment(\.colorScheme) private var colorScheme

  init(checked: Bool, pressed: Bool, cornerRadius: CGFloat, @ViewBuilder mark: () -> Mark) {
    self.checked = checked
    self.pressed = pressed
    self.cornerRadius = cornerRadius
    self.mark = mark()
  }

  var body: some View {
    let shape = RoundedRectangle(cornerRadius: cornerRadius, style: .continuous)
    ZStack {
      shape.fill(fill)
      shape.strokeBorder(border, lineWidth: 1)
      if checked {
        mark
      }
    }
    .frame(width: 16, height: 16)
    .shadow(raised ? .control : Shadow(color: .clear, radius: 0))
  }

  private var isDark: Bool { colorScheme == .dark }

  private var raised: Bool { !checked && isEnabled && !isDark }

  private var fill: Color {
    if checked {
      return !isEnabled ? .accentDisabled : pressed ? .accentPressed : .accent
    }
    if !isEnabled { return .controlDisabled }
    if isDark { return pressed ? .labelTertiary.opacity(0.6) : .labelQuaternary }
    return pressed ? .control : .surface
  }

  private var border: Color {
    if checked {
      return !isEnabled ? .clear : pressed ? .accentPressed : .accent
    }
    if !isEnabled { return isDark ? .clear : .label.opacity(0.1) }
    if invalid { return .danger }
    return isDark ? .clear : .label.opacity(0.25)
  }
}

struct PressReader<Content: View>: ButtonStyle {
  let content: (Bool) -> Content

  init(@ViewBuilder content: @escaping (Bool) -> Content) {
    self.content = content
  }

  func makeBody(configuration: Configuration) -> some View {
    content(configuration.isPressed)
  }
}

public struct CheckboxStyle: ToggleStyle {
  public init() {}

  public func makeBody(configuration: Configuration) -> some View {
    HapticButton(style: PressReader { pressed in
      HStack(spacing: 12) {
        SelectionIndicator(
          checked: configuration.isOn || configuration.isMixed,
          pressed: pressed,
          cornerRadius: 4
        ) {
          (configuration.isMixed ? Ph.minus.regular : Ph.check.regular)
            .frame(width: 14, height: 14)
            .foregroundStyle(Color.onAccent)
        }
        configuration.label
      }
      .contentShape(Rectangle().inset(by: -8))
    }) {
      configuration.isOn.toggle()
      return true
    }
    .accessibilityElement(children: .combine)
    .accessibilityRemoveTraits(.isButton)
    .accessibilityAddTraits(.isToggle)
    .accessibilityValue(
      configuration.isMixed
        ? Text("Mixed")
        : configuration.isOn ? Text("Checked") : Text("Unchecked")
    )
  }
}

extension ToggleStyle where Self == CheckboxStyle {
  public static var checkbox: CheckboxStyle { CheckboxStyle() }
}
```

```swift title="swift/Components/Chip.swift"
import PhosphorSwift
import SwiftUI

public enum ChipSize: CaseIterable, Sendable {
  case sm, `default`

  var height: CGFloat {
    switch self {
    case .sm: 28
    case .default: 32
    }
  }

  var padding: CGFloat {
    switch self {
    case .sm: 10
    case .default: 12
    }
  }

  var iconSize: CGFloat {
    switch self {
    case .sm: 14
    case .default: 16
    }
  }

  var textStyle: TextStyle {
    switch self {
    case .sm: .xs
    case .default: .sm
    }
  }
}

enum ChipSelection {
  static func toggle<Value: Hashable>(_ current: Value?, _ value: Value) -> Value? {
    current == value ? nil : value
  }

  static func toggle<Value: Hashable>(_ current: Set<Value>, _ value: Value) -> Set<Value> {
    var next = current
    if next.contains(value) {
      next.remove(value)
    } else {
      next.insert(value)
    }
    return next
  }
}

struct ChipGroupContext {
  var size: ChipSize
  var isSelected: (AnyHashable) -> Bool
  var toggle: (AnyHashable) -> Void
}

extension EnvironmentValues {
  @Entry var chipGroup: ChipGroupContext?
}

public struct ChipGroup<Value: Hashable, Content: View>: View {
  let size: ChipSize
  let scrollable: Bool
  let isSelected: (Value) -> Bool
  let toggle: (Value) -> Void
  let content: Content

  @Environment(\.accessibilityReduceMotion) private var reduceMotion

  public init(
    selection: Binding<Value?>,
    size: ChipSize = .default,
    scrollable: Bool = false,
    @ViewBuilder content: () -> Content
  ) {
    self.size = size
    self.scrollable = scrollable
    isSelected = { selection.wrappedValue == $0 }
    toggle = { selection.wrappedValue = ChipSelection.toggle(selection.wrappedValue, $0) }
    self.content = content()
  }

  public init(
    selection: Binding<Set<Value>>,
    size: ChipSize = .default,
    scrollable: Bool = false,
    @ViewBuilder content: () -> Content
  ) {
    self.size = size
    self.scrollable = scrollable
    isSelected = { selection.wrappedValue.contains($0) }
    toggle = { selection.wrappedValue = ChipSelection.toggle(selection.wrappedValue, $0) }
    self.content = content()
  }

  public var body: some View {
    let context = ChipGroupContext(
      size: size,
      isSelected: { value in (value.base as? Value).map(isSelected) ?? false },
      toggle: { value in
        guard let value = value.base as? Value else { return }
        if reduceMotion {
          toggle(value)
        } else {
          withAnimation(.timingCurve(0.32, 0.72, 0, 1, duration: 0.2)) { toggle(value) }
        }
      }
    )
    Group {
      if scrollable {
        ScrollView(.horizontal, showsIndicators: false) {
          HStack(spacing: 8) { content }
        }
        .scrollClipDisabled()
      } else {
        ComboboxFlowLayout(spacing: 8) { content }
      }
    }
    .environment(\.chipGroup, context)
    .accessibilityElement(children: .contain)
  }
}

public struct Chip<Label: View>: View {
  enum Source {
    case none
    case binding(Binding<Bool>)
    case value(AnyHashable)
  }

  let source: Source
  let size: ChipSize?
  let icon: Image?
  let onRemove: (() -> Void)?
  let label: Label

  @Environment(\.chipGroup) private var group
  @Environment(\.isEnabled) private var isEnabled

  public init(
    isSelected: Binding<Bool>? = nil,
    size: ChipSize? = nil,
    icon: Image? = nil,
    onRemove: (() -> Void)? = nil,
    @ViewBuilder label: () -> Label
  ) {
    source = isSelected.map(Source.binding) ?? .none
    self.size = size
    self.icon = icon
    self.onRemove = onRemove
    self.label = label()
  }

  public init<Value: Hashable>(
    value: Value,
    size: ChipSize? = nil,
    icon: Image? = nil,
    onRemove: (() -> Void)? = nil,
    @ViewBuilder label: () -> Label
  ) {
    source = .value(AnyHashable(value))
    self.size = size
    self.icon = icon
    self.onRemove = onRemove
    self.label = label()
  }

  private var selected: Bool {
    switch source {
    case .none: false
    case .binding(let binding): binding.wrappedValue
    case .value(let value): group?.isSelected(value) ?? false
    }
  }

  private var selectable: Bool {
    switch source {
    case .none: false
    case .binding: true
    case .value: group != nil
    }
  }

  private func activate() -> Bool {
    switch source {
    case .none:
      return false
    case .binding(let binding):
      binding.wrappedValue.toggle()
      return true
    case .value(let value):
      guard let group else { return false }
      group.toggle(value)
      return true
    }
  }

  public var body: some View {
    let resolved = size ?? group?.size ?? .default
    let selected = selected
    Group {
      if selectable {
        HapticButton(style: PressReader { pressed in
          surface(size: resolved, selected: selected, pressed: pressed)
        }) {
          activate()
        }
        .accessibilityAddTraits(selected ? .isSelected : [])
      } else {
        surface(size: resolved, selected: selected, pressed: false)
          .accessibilityElement(children: .combine)
      }
    }
    .overlay(alignment: .trailing) {
      if let onRemove {
        Button(action: onRemove) {
          Color.clear
            .frame(width: resolved.height, height: resolved.height)
            .contentShape(Rectangle())
        }
        .buttonStyle(.plain)
        .accessibilityHidden(true)
      }
    }
    .accessibilityActions {
      if let onRemove {
        Button("Remove", action: onRemove)
      }
    }
  }

  private func surface(size: ChipSize, selected: Bool, pressed: Bool) -> some View {
    HStack(spacing: 6) {
      if let icon {
        icon
          .frame(width: size.iconSize, height: size.iconSize)
          .accessibilityHidden(true)
      }
      label
        .scaledFont(size.textStyle, weight: .medium)
        .lineLimit(1)
      if onRemove != nil {
        Ph.x.bold
          .frame(width: size.iconSize - 4, height: size.iconSize - 4)
          .opacity(0.7)
          .accessibilityHidden(true)
      }
    }
    .foregroundStyle(foreground(selected: selected))
    .padding(.horizontal, size.padding)
    .frame(height: size.height)
    .background(background(selected: selected, pressed: pressed), in: Capsule())
    .opacity(selected && !isEnabled ? 0.4 : 1)
    .contentShape(Capsule())
  }

  private func foreground(selected: Bool) -> Color {
    if selected { return .onControlSelected }
    return isEnabled ? .label : .labelQuaternary
  }

  private func background(selected: Bool, pressed: Bool) -> Color {
    if selected {
      return isEnabled && pressed ? .controlSelected.opacity(0.8) : .controlSelected
    }
    if !isEnabled { return .controlDisabled }
    return pressed ? .controlPressed : .control
  }
}

extension Chip where Label == Text {
  public init(
    _ title: LocalizedStringKey,
    isSelected: Binding<Bool>? = nil,
    size: ChipSize? = nil,
    icon: Image? = nil,
    onRemove: (() -> Void)? = nil
  ) {
    self.init(isSelected: isSelected, size: size, icon: icon, onRemove: onRemove) { Text(title) }
  }

  public init<Value: Hashable>(
    _ title: LocalizedStringKey,
    value: Value,
    size: ChipSize? = nil,
    icon: Image? = nil,
    onRemove: (() -> Void)? = nil
  ) {
    self.init(value: value, size: size, icon: icon, onRemove: onRemove) { Text(title) }
  }
}
```

```swift title="swift/Components/Combobox.swift"
import PhosphorSwift
import SwiftUI

public struct Combobox<Item: Hashable & Sendable>: View {
  let items: [Item]
  let single: Binding<Item?>?
  let multiple: Binding<[Item]>?
  let placeholder: LocalizedStringKey
  let searchPlaceholder: LocalizedStringKey
  let emptyText: LocalizedStringKey
  let title: (Item) -> String

  @State private var open = false
  @Environment(\.isEnabled) private var isEnabled
  @Environment(\.isInvalid) private var invalid
  @Environment(\.colorScheme) private var colorScheme

  public init(
    _ items: [Item],
    selection: Binding<Item?>,
    placeholder: LocalizedStringKey = "Select",
    searchPlaceholder: LocalizedStringKey = "Search",
    emptyText: LocalizedStringKey = "No items found.",
    title: @escaping (Item) -> String
  ) {
    self.items = items
    self.single = selection
    self.multiple = nil
    self.placeholder = placeholder
    self.searchPlaceholder = searchPlaceholder
    self.emptyText = emptyText
    self.title = title
  }

  public init(
    _ items: [Item],
    selection: Binding<[Item]>,
    placeholder: LocalizedStringKey = "Select",
    searchPlaceholder: LocalizedStringKey = "Search",
    emptyText: LocalizedStringKey = "No items found.",
    title: @escaping (Item) -> String
  ) {
    self.items = items
    self.single = nil
    self.multiple = selection
    self.placeholder = placeholder
    self.searchPlaceholder = searchPlaceholder
    self.emptyText = emptyText
    self.title = title
  }

  public var body: some View {
    trigger
      .anchoredPopup(
        isPresented: $open,
        side: .bottom,
        align: .start,
        matchWidth: true,
        minWidth: 144,
        maxHeight: 340
      ) {
        ComboboxPanel(
          items: items,
          single: single,
          multiple: multiple,
          searchPlaceholder: searchPlaceholder,
          emptyText: emptyText,
          title: title
        )
      }
  }

  private var shape: RoundedRectangle {
    RoundedRectangle(cornerRadius: Radius.lg, style: .continuous)
  }

  private var background: Color {
    if !isEnabled { return .controlDisabled }
    if invalid { return .danger.opacity(colorScheme == .dark ? 0.1 : 0.05) }
    return .control
  }

  @ViewBuilder private var trigger: some View {
    if let multiple {
      chips(multiple)
    } else if let single {
      input(single)
    }
  }

  private func input(_ selection: Binding<Item?>) -> some View {
    HStack(spacing: 4) {
      Button {
        open = true
      } label: {
        Group {
          if let value = selection.wrappedValue {
            Text(verbatim: title(value))
              .foregroundStyle(isEnabled ? Color.label : .labelQuaternary)
          } else {
            Text(placeholder)
              .foregroundStyle(isEnabled ? Color.labelSecondary : .labelQuaternary)
          }
        }
        .font(TextStyle.base.font())
        .tracking(TextStyle.base.letterSpacing)
        .lineLimit(1)
        .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .leading)
        .padding(.leading, 12)
        .contentShape(Rectangle())
      }
      .buttonStyle(.plain)
      .accessibilityHint(Text("Shows options"))
      if selection.wrappedValue != nil {
        Button {
          selection.wrappedValue = nil
        } label: {
          Ph.x.regular
            .frame(width: 16, height: 16)
            .foregroundStyle(isEnabled ? Color.label : .labelQuaternary)
        }
        .buttonStyle(ComboboxIconButtonStyle())
        .accessibilityLabel(Text("Clear"))
      }
      Button {
        open = true
      } label: {
        Ph.caretDown.regular
          .frame(width: 16, height: 16)
          .foregroundStyle(isEnabled ? Color.labelSecondary : .labelQuaternary)
      }
      .buttonStyle(ComboboxIconButtonStyle())
      .accessibilityHidden(true)
    }
    .padding(.trailing, 8)
    .frame(height: 44)
    .background(background, in: shape)
    .overlay {
      if invalid { shape.strokeBorder(Color.danger) }
    }
  }

  private func chips(_ selection: Binding<[Item]>) -> some View {
    let values = selection.wrappedValue
    return ComboboxFlowLayout(spacing: 6) {
      ForEach(values, id: \.self) { value in
        ComboboxChip(text: title(value)) {
          selection.wrappedValue.removeAll { $0 == value }
        }
      }
      if values.isEmpty {
        Text(placeholder)
          .font(TextStyle.base.font())
          .tracking(TextStyle.base.letterSpacing)
          .foregroundStyle(isEnabled ? Color.labelSecondary : .labelQuaternary)
          .lineLimit(1)
      }
    }
    .padding(.horizontal, values.isEmpty ? 12 : 6)
    .padding(.vertical, 6)
    .frame(maxWidth: .infinity, minHeight: 44, alignment: .leading)
    .background(background, in: shape)
    .overlay {
      if invalid { shape.strokeBorder(Color.danger) }
    }
    .contentShape(shape)
    .onTapGesture {
      if isEnabled { open = true }
    }
    .accessibilityElement(children: .contain)
    .accessibilityAction(named: Text("Show options")) { open = true }
  }
}

extension Combobox where Item == String {
  public init(
    _ items: [String],
    selection: Binding<String?>,
    placeholder: LocalizedStringKey = "Select",
    searchPlaceholder: LocalizedStringKey = "Search",
    emptyText: LocalizedStringKey = "No items found."
  ) {
    self.init(
      items,
      selection: selection,
      placeholder: placeholder,
      searchPlaceholder: searchPlaceholder,
      emptyText: emptyText
    ) { $0 }
  }

  public init(
    _ items: [String],
    selection: Binding<[String]>,
    placeholder: LocalizedStringKey = "Select",
    searchPlaceholder: LocalizedStringKey = "Search",
    emptyText: LocalizedStringKey = "No items found."
  ) {
    self.init(
      items,
      selection: selection,
      placeholder: placeholder,
      searchPlaceholder: searchPlaceholder,
      emptyText: emptyText
    ) { $0 }
  }
}

private struct ComboboxIconButtonStyle: ButtonStyle {
  func makeBody(configuration: Configuration) -> some View {
    configuration.label
      .frame(width: 24, height: 24)
      .background(configuration.isPressed ? Color.itemPressed : .clear, in: Circle())
      .contentShape(Circle().inset(by: -6))
  }
}

private struct ComboboxChip: View {
  let text: String
  let remove: () -> Void

  @Environment(\.isEnabled) private var isEnabled

  var body: some View {
    HStack(spacing: 2) {
      Text(verbatim: text)
        .font(TextStyle.xs.font())
        .tracking(TextStyle.xs.letterSpacing)
        .lineLimit(1)
      Button(action: remove) {
        Ph.x.regular
          .frame(width: 12, height: 12)
          .frame(width: 20, height: 20)
          .contentShape(Rectangle())
      }
      .buttonStyle(ChipRemoveStyle())
      .accessibilityLabel(Text("Remove \(text)"))
    }
    .foregroundStyle(isEnabled ? Color.link : .labelQuaternary)
    .padding(.leading, 10)
    .padding(.trailing, 2)
    .frame(height: 22)
    .background(isEnabled ? Color.accentSurface : .controlDisabled, in: Capsule())
  }
}

private struct ChipRemoveStyle: ButtonStyle {
  func makeBody(configuration: Configuration) -> some View {
    configuration.label.opacity(configuration.isPressed ? 1 : 0.5)
  }
}

struct ComboboxFlowLayout: Layout {
  var spacing: CGFloat

  func sizeThatFits(proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) -> CGSize {
    let rows = arrange(width: proposal.width ?? .infinity, subviews: subviews)
    let width = rows.map(\.width).max() ?? 0
    let height = rows.map(\.height).reduce(0, +) + spacing * CGFloat(max(rows.count - 1, 0))
    return CGSize(width: proposal.width ?? width, height: height)
  }

  func placeSubviews(in bounds: CGRect, proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) {
    var y = bounds.minY
    for row in arrange(width: bounds.width, subviews: subviews) {
      var x = bounds.minX
      for index in row.indices {
        let size = subviews[index].sizeThatFits(.unspecified)
        subviews[index].place(
          at: CGPoint(x: x, y: y + (row.height - size.height) / 2),
          anchor: .topLeading,
          proposal: ProposedViewSize(width: min(size.width, bounds.width), height: size.height)
        )
        x += size.width + spacing
      }
      y += row.height + spacing
    }
  }

  private struct Row {
    var indices: [Int] = []
    var width: CGFloat = 0
    var height: CGFloat = 0
  }

  private func arrange(width: CGFloat, subviews: Subviews) -> [Row] {
    var rows: [Row] = []
    var row = Row()
    for index in subviews.indices {
      let size = subviews[index].sizeThatFits(.unspecified)
      let next = row.indices.isEmpty ? size.width : row.width + spacing + size.width
      if !row.indices.isEmpty && next > width {
        rows.append(row)
        row = Row()
      }
      row.width = row.indices.isEmpty ? size.width : row.width + spacing + size.width
      row.height = max(row.height, size.height)
      row.indices.append(index)
    }
    if !row.indices.isEmpty { rows.append(row) }
    return rows
  }
}

struct ComboboxPanel<Item: Hashable & Sendable>: View {
  let items: [Item]
  let single: Binding<Item?>?
  let multiple: Binding<[Item]>?
  let searchPlaceholder: LocalizedStringKey
  let emptyText: LocalizedStringKey
  let title: (Item) -> String
  var initialQuery = ""
  var autofocus = true

  @State private var query = ""
  @FocusState private var focused: Bool
  @Environment(\.overlayDismiss) private var dismiss

  var body: some View {
    let filtered = items.filter { query.isEmpty || title($0).localizedCaseInsensitiveContains(query) }
    let list = VStack(alignment: .leading, spacing: 0) {
      if filtered.isEmpty {
        Text(emptyText)
          .font(TextStyle.sm.font())
          .tracking(TextStyle.sm.letterSpacing)
          .foregroundStyle(Color.labelSecondary)
          .multilineTextAlignment(.center)
          .frame(maxWidth: .infinity)
          .padding(.vertical, 8)
      }
      ForEach(filtered, id: \.self) { item in
        row(item)
      }
    }
    .padding(6)
    VStack(spacing: 0) {
      TextField(searchPlaceholder, text: $query)
        .focused($focused)
        .textInputAutocapitalization(.never)
        .autocorrectionDisabled()
        .font(TextStyle.base.font())
        .foregroundStyle(Color.label)
        .tint(Color.accent)
        .padding(.horizontal, 12)
        .frame(height: 32)
        .background(Color.control, in: RoundedRectangle(cornerRadius: Radius.lg, style: .continuous))
        .overlay {
          RoundedRectangle(cornerRadius: Radius.lg, style: .continuous)
            .strokeBorder(Color.separator.opacity(0.3))
        }
        .padding([.horizontal, .top], 6)
      ViewThatFits(in: .vertical) {
        list
        ScrollView { list }
      }
    }
    .font(TextStyle.base.font())
    .tracking(TextStyle.base.letterSpacing)
    .foregroundStyle(Color.label)
    .popupSurface(radius: Radius.xl)
    .accessibilityElement(children: .contain)
    .onAppear {
      query = initialQuery
      if autofocus { focused = true }
    }
  }

  private func isSelected(_ item: Item) -> Bool {
    if let multiple { return multiple.wrappedValue.contains(item) }
    return single?.wrappedValue == item
  }

  private func row(_ item: Item) -> some View {
    let selected = isSelected(item)
    return Button {
      if let multiple {
        if selected {
          multiple.wrappedValue.removeAll { $0 == item }
        } else {
          multiple.wrappedValue.append(item)
        }
      } else {
        single?.wrappedValue = item
        dismiss?()
      }
    } label: {
      Text(verbatim: title(item))
    }
    .buttonStyle(MenuRowStyle(trailing: 32))
    .overlay(alignment: .trailing) {
      if selected {
        Ph.check.regular
          .frame(width: 16, height: 16)
          .foregroundStyle(Color.link)
          .padding(.trailing, 8)
          .accessibilityHidden(true)
      }
    }
    .accessibilityAddTraits(selected ? .isSelected : [])
  }
}
```

```swift title="swift/Components/DropdownMenu.swift"
import PhosphorSwift
import SwiftUI

enum MenuPresentation: Sendable {
  case system, popup
}

extension EnvironmentValues {
  @Entry var menuPresentation: MenuPresentation = .system
  @Entry var menuRadio = MenuRadioContext()
}

struct MenuRadioContext: @unchecked Sendable {
  var selected: AnyHashable?
  var select: @MainActor @Sendable (AnyHashable) -> Void = { _ in }
}

public struct DropdownMenu<Label: View, Content: View>: View {
  let side: Edge
  let align: PopupAlignment
  let sideOffset: CGFloat
  let alignOffset: CGFloat
  let external: Binding<Bool>?
  let content: () -> Content
  let label: Label

  @State private var local = false

  public init(
    isPresented: Binding<Bool>? = nil,
    side: Edge = .bottom,
    align: PopupAlignment = .start,
    sideOffset: CGFloat = 4,
    alignOffset: CGFloat = 0,
    @ViewBuilder content: @escaping () -> Content,
    @ViewBuilder label: () -> Label
  ) {
    self.external = isPresented
    self.side = side
    self.align = align
    self.sideOffset = sideOffset
    self.alignOffset = alignOffset
    self.content = content
    self.label = label()
  }

  public var body: some View {
    let binding = external ?? $local
    Button {
      binding.wrappedValue = true
    } label: {
      label
    }
    .accessibilityHint(Text("Opens a menu"))
    .anchoredPopup(
      isPresented: binding,
      side: side,
      align: align,
      sideOffset: sideOffset,
      alignOffset: alignOffset,
      minWidth: 192
    ) {
      MenuPanel(content: content)
    }
  }
}

extension DropdownMenu where Label == Text {
  public init(
    _ title: LocalizedStringKey,
    isPresented: Binding<Bool>? = nil,
    side: Edge = .bottom,
    align: PopupAlignment = .start,
    @ViewBuilder content: @escaping () -> Content
  ) {
    self.init(isPresented: isPresented, side: side, align: align, content: content) { Text(title) }
  }
}

struct MenuPanel<Content: View>: View {
  @ViewBuilder let content: () -> Content

  var body: some View {
    let stack = VStack(alignment: .leading, spacing: 0) {
      content()
    }
    .padding(6)
    ViewThatFits(in: .vertical) {
      stack
      ScrollView { stack }
    }
    .font(TextStyle.base.font())
    .tracking(TextStyle.base.letterSpacing)
    .foregroundStyle(Color.label)
    .environment(\.menuPresentation, .popup)
    .popupSurface(radius: Radius.xl)
    .accessibilityElement(children: .contain)
  }
}

struct MenuRowStyle: ButtonStyle {
  var destructive = false
  var inset = false
  var trailing: CGFloat = 12
  var selected = false

  @Environment(\.isEnabled) private var isEnabled

  func makeBody(configuration: Configuration) -> some View {
    configuration.label
      .labelStyle(ButtonLabelStyle(spacing: 10, iconSize: 16))
      .lineLimit(1)
      .foregroundStyle(!isEnabled ? Color.labelQuaternary : destructive ? .danger : .label)
      .padding(.leading, inset ? 38 : 12)
      .padding(.trailing, trailing)
      .padding(.vertical, 8)
      .frame(maxWidth: .infinity, alignment: .leading)
      .background(background(pressed: configuration.isPressed), in: RoundedRectangle(cornerRadius: Radius.md, style: .continuous))
      .contentShape(Rectangle())
  }

  private func background(pressed: Bool) -> Color {
    if pressed && isEnabled {
      return destructive ? .dangerSurfacePressed : .itemPressed
    }
    return selected ? .itemSelected : .clear
  }
}

private struct MenuCheckmark: View {
  let visible: Bool

  var body: some View {
    Ph.check.regular
      .frame(width: 16, height: 16)
      .opacity(visible ? 1 : 0)
      .padding(.trailing, 8)
      .accessibilityHidden(true)
  }
}

public struct DropdownMenuItem<Label: View>: View {
  public enum Variant: CaseIterable, Sendable {
    case `default`, destructive
  }

  let variant: Variant
  let inset: Bool
  let action: () -> Void
  let label: Label

  @Environment(\.menuPresentation) private var presentation
  @Environment(\.overlayDismiss) private var dismiss

  public init(
    variant: Variant = .default,
    inset: Bool = false,
    action: @escaping () -> Void,
    @ViewBuilder label: () -> Label
  ) {
    self.variant = variant
    self.inset = inset
    self.action = action
    self.label = label()
  }

  public var body: some View {
    if presentation == .system {
      Button(role: variant == .destructive ? .destructive : nil, action: action) {
        label
      }
    } else {
      Button {
        action()
        dismiss?()
      } label: {
        HStack(spacing: 10) {
          label
        }
      }
      .buttonStyle(MenuRowStyle(destructive: variant == .destructive, inset: inset))
    }
  }
}

extension DropdownMenuItem where Label == Text {
  public init(
    _ title: LocalizedStringKey,
    variant: Variant = .default,
    inset: Bool = false,
    action: @escaping () -> Void
  ) {
    self.init(variant: variant, inset: inset, action: action) { Text(title) }
  }
}

extension DropdownMenuItem where Label == SwiftUI.Label<Text, Image> {
  public init(
    _ title: LocalizedStringKey,
    icon: Image,
    variant: Variant = .default,
    action: @escaping () -> Void
  ) {
    self.init(variant: variant, action: action) {
      SwiftUI.Label { Text(title) } icon: { icon }
    }
  }
}

public struct DropdownMenuCheckboxItem<Label: View>: View {
  let isOn: Binding<Bool>
  let inset: Bool
  let label: Label

  @Environment(\.menuPresentation) private var presentation

  public init(isOn: Binding<Bool>, inset: Bool = false, @ViewBuilder label: () -> Label) {
    self.isOn = isOn
    self.inset = inset
    self.label = label()
  }

  public var body: some View {
    if presentation == .system {
      Toggle(isOn: isOn) { label }
    } else {
      Button {
        isOn.wrappedValue.toggle()
      } label: {
        label
      }
      .buttonStyle(MenuRowStyle(inset: inset, trailing: 32))
      .overlay(alignment: .trailing) { MenuCheckmark(visible: isOn.wrappedValue) }
      .accessibilityAddTraits(isOn.wrappedValue ? [.isToggle, .isSelected] : .isToggle)
    }
  }
}

extension DropdownMenuCheckboxItem where Label == Text {
  public init(_ title: LocalizedStringKey, isOn: Binding<Bool>, inset: Bool = false) {
    self.init(isOn: isOn, inset: inset) { Text(title) }
  }
}

public struct DropdownMenuRadioGroup<Content: View>: View {
  let selection: Binding<AnyHashable>
  let content: Content

  public init<Value: Hashable & Sendable>(selection: Binding<Value>, @ViewBuilder content: () -> Content) {
    self.selection = Binding(
      get: { AnyHashable(selection.wrappedValue) },
      set: { value in
        if let value = value.base as? Value { selection.wrappedValue = value }
      }
    )
    self.content = content()
  }

  public var body: some View {
    let binding = selection
    content
      .environment(
        \.menuRadio,
        MenuRadioContext(selected: binding.wrappedValue, select: { binding.wrappedValue = $0 })
      )
  }
}

public struct DropdownMenuRadioItem<Label: View>: View {
  let value: AnyHashable
  let inset: Bool
  let label: Label

  @Environment(\.menuPresentation) private var presentation
  @Environment(\.menuRadio) private var radio

  public init<Value: Hashable & Sendable>(value: Value, inset: Bool = false, @ViewBuilder label: () -> Label) {
    self.value = AnyHashable(value)
    self.inset = inset
    self.label = label()
  }

  public var body: some View {
    let selected = radio.selected == value
    if presentation == .system {
      let radio = radio
      let value = value
      Toggle(isOn: Binding(get: { selected }, set: { if $0 { radio.select(value) } })) { label }
    } else {
      Button {
        radio.select(value)
      } label: {
        label
      }
      .buttonStyle(MenuRowStyle(inset: inset, trailing: 32))
      .overlay(alignment: .trailing) { MenuCheckmark(visible: selected) }
      .accessibilityAddTraits(selected ? .isSelected : [])
    }
  }
}

extension DropdownMenuRadioItem where Label == Text {
  public init<Value: Hashable & Sendable>(_ title: LocalizedStringKey, value: Value, inset: Bool = false) {
    self.init(value: value, inset: inset) { Text(title) }
  }
}

public struct DropdownMenuLabel: View {
  let title: LocalizedStringKey
  let inset: Bool

  @Environment(\.menuPresentation) private var presentation

  public init(_ title: LocalizedStringKey, inset: Bool = false) {
    self.title = title
    self.inset = inset
  }

  public var body: some View {
    if presentation == .system {
      Text(title)
    } else {
      Text(title)
        .font(TextStyle.xs.font(weight: .semibold))
        .tracking(TextStyle.xs.letterSpacing)
        .foregroundStyle(Color.labelSecondary)
        .padding(.leading, inset ? 38 : 12)
        .padding(.trailing, 12)
        .padding(.vertical, 10)
        .frame(maxWidth: .infinity, alignment: .leading)
        .accessibilityAddTraits(.isHeader)
    }
  }
}

public struct DropdownMenuGroup<Content: View>: View {
  let content: Content

  @Environment(\.menuPresentation) private var presentation

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    if presentation == .system {
      Section { content }
    } else {
      VStack(alignment: .leading, spacing: 0) { content }
    }
  }
}

public struct DropdownMenuSeparator: View {
  @Environment(\.menuPresentation) private var presentation

  public init() {}

  public var body: some View {
    if presentation == .system {
      Divider()
    } else {
      Rectangle()
        .fill(Color.separator.opacity(0.5))
        .frame(height: 1)
        .padding(.vertical, 6)
        .padding(.horizontal, -6)
        .accessibilityHidden(true)
    }
  }
}

public struct DropdownMenuSub<Label: View, Content: View>: View {
  let inset: Bool
  let content: Content
  let label: Label

  @State private var open = false
  @Environment(\.menuPresentation) private var presentation
  @Environment(\.accessibilityReduceMotion) private var reduceMotion

  public init(inset: Bool = false, @ViewBuilder content: () -> Content, @ViewBuilder label: () -> Label) {
    self.inset = inset
    self.content = content()
    self.label = label()
  }

  public var body: some View {
    if presentation == .system {
      Menu { content } label: { label }
    } else {
      VStack(alignment: .leading, spacing: 0) {
        Button {
          withAnimation(reduceMotion ? nil : .easeInOut(duration: 0.2)) { open.toggle() }
        } label: {
          HStack(spacing: 8) {
            label
            Spacer(minLength: 16)
            Ph.caretRight.regular
              .frame(width: 16, height: 16)
              .rotationEffect(.degrees(open ? 90 : 0))
          }
        }
        .buttonStyle(MenuRowStyle(inset: inset, selected: open))
        .accessibilityValue(Text(open ? "Expanded" : "Collapsed"))
        if open {
          VStack(alignment: .leading, spacing: 0) { content }
            .padding(.leading, 12)
            .transition(.opacity)
        }
      }
    }
  }
}

extension DropdownMenuSub where Label == Text {
  public init(_ title: LocalizedStringKey, inset: Bool = false, @ViewBuilder content: () -> Content) {
    self.init(inset: inset, content: content) { Text(title) }
  }
}

extension DropdownMenuSub where Label == SwiftUI.Label<Text, Image> {
  public init(_ title: LocalizedStringKey, icon: Image, @ViewBuilder content: () -> Content) {
    self.init(content: content) {
      SwiftUI.Label { Text(title) } icon: { icon }
    }
  }
}
```

```swift title="swift/Components/Field.swift"
import SwiftUI

extension EnvironmentValues {
  @Entry public var isInvalid = false
  @Entry var fieldInset = false
  @Entry var fieldGroupInset = false
  @Entry var fieldSetInset = false
}

extension View {
  public func invalid(_ isInvalid: Bool = true) -> some View {
    environment(\.isInvalid, isInvalid)
  }
}

public enum FieldOrientation: CaseIterable, Sendable {
  case vertical, horizontal
}

public struct Field<Content: View>: View {
  let orientation: FieldOrientation
  let invalid: Bool?
  let content: Content

  @Environment(\.fieldGroupInset) private var inset
  @Environment(\.isInvalid) private var inheritedInvalid

  public init(
    orientation: FieldOrientation = .vertical,
    invalid: Bool? = nil,
    @ViewBuilder content: () -> Content
  ) {
    self.orientation = orientation
    self.invalid = invalid
    self.content = content()
  }

  public var body: some View {
    Group {
      switch orientation {
      case .vertical:
        VStack(alignment: .leading, spacing: 12) { content }
      case .horizontal:
        HStack(alignment: .center, spacing: 12) { content }
      }
    }
    .frame(maxWidth: .infinity, alignment: .leading)
    .padding(.horizontal, inset ? 16 : 0)
    .padding(.vertical, inset ? 6 : 0)
    .frame(minHeight: inset ? 44 : nil)
    .overlay(alignment: .top) {
      if inset {
        Color.separator
          .frame(height: 1)
          .padding(.leading, 16)
          .offset(y: -1)
      }
    }
    .environment(\.fieldInset, inset)
    .environment(\.fieldGroupInset, false)
    .environment(\.isInvalid, invalid ?? inheritedInvalid)
  }
}

public struct FieldContent<Content: View>: View {
  let content: Content

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    VStack(alignment: .leading, spacing: 4) {
      content
    }
    .frame(maxWidth: .infinity, alignment: .leading)
  }
}

public struct FieldTitle: View {
  let text: Text

  @Environment(\.isEnabled) private var isEnabled

  public init(_ title: LocalizedStringKey) {
    text = Text(title)
  }

  public init<S: StringProtocol>(_ title: S) {
    text = Text(title)
  }

  public var body: some View {
    text
      .scaledTextStyle(.base, weight: .semibold)
      .foregroundStyle(isEnabled ? Color.label : .labelQuaternary)
  }
}

public struct FieldDescription: View {
  let text: Text

  @Environment(\.fieldSetInset) private var inset

  public init(_ description: LocalizedStringKey) {
    text = Text(description)
  }

  public init<S: StringProtocol>(_ description: S) {
    text = Text(description)
  }

  public var body: some View {
    text
      .scaledTextStyle(inset ? .xs : .sm)
      .foregroundStyle(Color.labelSecondary)
      .multilineTextAlignment(.leading)
      .fixedSize(horizontal: false, vertical: true)
      .padding(.leading, inset ? 16 : 0)
  }
}

public struct FieldError: View {
  let messages: [String]
  let text: Text?

  public init(_ message: LocalizedStringKey) {
    messages = []
    text = Text(message)
  }

  public init(errors: [String?]) {
    var seen = Set<String>()
    messages = errors.compactMap { $0 }.filter { !$0.isEmpty && seen.insert($0).inserted }
    text = nil
  }

  public var body: some View {
    if let content {
      content
        .scaledTextStyle(.sm)
        .foregroundStyle(Color.danger)
        .multilineTextAlignment(.leading)
        .fixedSize(horizontal: false, vertical: true)
    }
  }

  private var content: Text? {
    if let text { return text }
    switch messages.count {
    case 0: return nil
    case 1: return Text(verbatim: messages[0])
    default: return Text(verbatim: messages.map { "\u{2022} \($0)" }.joined(separator: "\n"))
    }
  }
}

public enum FieldGroupVariant: CaseIterable, Sendable {
  case `default`, inset
}

public struct FieldGroup<Content: View>: View {
  let variant: FieldGroupVariant
  let content: Content

  public init(_ variant: FieldGroupVariant = .default, @ViewBuilder content: () -> Content) {
    self.variant = variant
    self.content = content()
  }

  public var body: some View {
    styled
      .environment(\.fieldGroupInset, variant == .inset)
      .environment(\.fieldSetInset, false)
      .transformPreference(FieldSetInsetKey.self) { $0 = variant == .inset }
  }

  @ViewBuilder private var styled: some View {
    let stack = VStack(alignment: .leading, spacing: variant == .inset ? 0 : 28) {
      content
    }
    .frame(maxWidth: .infinity, alignment: .leading)
    if variant == .inset {
      let shape = RoundedRectangle(cornerRadius: Radius.xl2, style: .continuous)
      stack
        .background(Color.surfaceSecondary, in: shape)
        .clipShape(shape)
    } else {
      stack
    }
  }
}

struct FieldSetInsetKey: PreferenceKey {
  static let defaultValue = false

  static func reduce(value: inout Bool, nextValue: () -> Bool) {
    value = value || nextValue()
  }
}

public struct FieldSet<Content: View>: View {
  let content: Content

  @State private var inset = false

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    VStack(alignment: .leading, spacing: inset ? 8 : 24) {
      content
    }
    .frame(maxWidth: .infinity, alignment: .leading)
    .environment(\.fieldSetInset, inset)
    .onPreferenceChange(FieldSetInsetKey.self) { inset = $0 }
    .transformPreference(FieldSetInsetKey.self) { $0 = false }
    .accessibilityElement(children: .contain)
  }
}

public struct FieldLegend: View {
  public enum Variant: CaseIterable, Sendable {
    case legend, label
  }

  let text: Text
  let variant: Variant

  @Environment(\.fieldSetInset) private var inset
  @Environment(\.isEnabled) private var isEnabled

  public init(_ title: LocalizedStringKey, variant: Variant = .legend) {
    text = Text(title)
    self.variant = variant
  }

  public init<S: StringProtocol>(_ title: S, variant: Variant = .legend) {
    text = Text(title)
    self.variant = variant
  }

  public var body: some View {
    Group {
      if inset {
        text
          .textCase(.uppercase)
          .scaledTextStyle(.xs)
          .foregroundStyle(isEnabled ? Color.labelSecondary : .labelQuaternary)
          .padding(.leading, 16)
      } else {
        text
          .scaledTextStyle(.base, weight: .semibold)
          .foregroundStyle(isEnabled ? Color.label : .labelQuaternary)
          .padding(.bottom, 12)
      }
    }
    .accessibilityAddTraits(variant == .legend ? .isHeader : [])
  }
}

public struct FieldSeparator<Content: View>: View {
  let content: Content

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    ZStack {
      Separator()
      content
        .scaledTextStyle(.sm)
        .foregroundStyle(Color.labelSecondary)
        .padding(.horizontal, 8)
        .background(Color.surface)
    }
    .frame(minHeight: 20)
    .padding(.vertical, -8)
  }
}

extension FieldSeparator where Content == EmptyView {
  public init() {
    self.init { EmptyView() }
  }
}

extension FieldSeparator where Content == Text {
  public init(_ title: LocalizedStringKey) {
    self.init { Text(title) }
  }
}
```

```swift title="swift/Components/Haptics.swift"
import SwiftUI

extension EnvironmentValues {
  @Entry public var hapticsEnabled = true
}

extension View {
  public func haptics(_ enabled: Bool) -> some View {
    environment(\.hapticsEnabled, enabled)
  }

  func hapticFeedback<Trigger: Equatable>(_ feedback: SensoryFeedback, trigger: Trigger) -> some View {
    modifier(HapticFeedbackModifier(feedback: feedback, trigger: trigger) { _, _ in true })
  }

  func hapticFeedback<Trigger: Equatable>(
    _ feedback: SensoryFeedback,
    trigger: Trigger,
    condition: @escaping (Trigger, Trigger) -> Bool
  ) -> some View {
    modifier(HapticFeedbackModifier(feedback: feedback, trigger: trigger, condition: condition))
  }
}

private struct HapticFeedbackModifier<Trigger: Equatable>: ViewModifier {
  let feedback: SensoryFeedback
  let trigger: Trigger
  let condition: (Trigger, Trigger) -> Bool

  @Environment(\.hapticsEnabled) private var enabled

  func body(content: Content) -> some View {
    let enabled = enabled
    let condition = condition
    content.sensoryFeedback(feedback, trigger: trigger) { old, new in
      enabled && condition(old, new)
    }
  }
}

enum HapticMoments {
  static func step(_ value: Double, bounds: ClosedRange<Double>, step: Double?) -> Int? {
    guard let step, step > 0 else { return nil }
    return Int(((value - bounds.lowerBound) / step).rounded())
  }

  static func lifted<Value: Equatable>(_ old: Value?, _ new: Value?) -> Bool {
    new != nil && old != new
  }

  static func crossed<Value: Equatable>(_ old: Value?, _ new: Value?) -> Bool {
    old == nil && new != nil
  }

  static func moved(_ old: Int?, _ new: Int?) -> Bool {
    guard let old, let new else { return false }
    return old != new
  }
}

struct HapticButton<Style: ButtonStyle>: View {
  let feedback: SensoryFeedback
  let action: () -> Bool
  let style: Style

  @State private var count = 0

  init(_ feedback: SensoryFeedback = .selection, style: Style, action: @escaping () -> Bool) {
    self.feedback = feedback
    self.style = style
    self.action = action
  }

  var body: some View {
    Button {
      if action() { count += 1 }
    } label: {
      EmptyView()
    }
    .buttonStyle(style)
    .hapticFeedback(feedback, trigger: count)
  }
}
```

```swift title="swift/Components/Header.swift"
import PhosphorSwift
import SwiftUI

extension EnvironmentValues {
  @Entry var headerProgress: CGFloat?
  @Entry var headerReport: ((CGFloat) -> Void)?
}

enum HeaderMath {
  static func progress(minY: CGFloat, height: CGFloat) -> CGFloat {
    guard height > 0 else { return 0 }
    return min(max(-minY / height, 0), 1)
  }
}

public struct Header<Title: View, Leading: View, Trailing: View>: View {
  let title: Title
  let leading: Leading
  let trailing: Trailing

  @Environment(\.headerProgress) private var progress
  @Environment(\.screenBackground) private var background

  public init(
    @ViewBuilder title: () -> Title,
    @ViewBuilder leading: () -> Leading,
    @ViewBuilder trailing: () -> Trailing
  ) {
    self.title = title()
    self.leading = leading()
    self.trailing = trailing()
  }

  public var body: some View {
    HeaderLayout {
      HStack(spacing: 0) { leading }
        .frame(maxHeight: .infinity)
      ZStack { title }
        .frame(maxWidth: .infinity, maxHeight: .infinity)
      HStack(spacing: 0) { trailing }
        .frame(maxHeight: .infinity)
    }
    .padding(.horizontal, 8)
    .frame(height: 44)
    .frame(maxWidth: .infinity)
    .background(background.ignoresSafeArea(.container, edges: .top))
    .overlay(alignment: .bottom) {
      Color.separator
        .frame(height: 1)
        .opacity(progress ?? 0)
    }
    .accessibilityElement(children: .contain)
    .accessibilityAddTraits(.isHeader)
  }
}

extension Header where Leading == EmptyView {
  public init(@ViewBuilder title: () -> Title, @ViewBuilder trailing: () -> Trailing) {
    self.init(title: title, leading: { EmptyView() }, trailing: trailing)
  }
}

extension Header where Trailing == EmptyView {
  public init(@ViewBuilder title: () -> Title, @ViewBuilder leading: () -> Leading) {
    self.init(title: title, leading: leading, trailing: { EmptyView() })
  }
}

extension Header where Leading == EmptyView, Trailing == EmptyView {
  public init(@ViewBuilder title: () -> Title) {
    self.init(title: title, leading: { EmptyView() }, trailing: { EmptyView() })
  }
}

struct HeaderLayout: Layout {
  var spacing: CGFloat = 8
  var minSide: CGFloat = 44

  func sizeThatFits(proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) -> CGSize {
    let ideal = subviews.reduce(0) { $0 + $1.sizeThatFits(.unspecified).width }
    return CGSize(width: proposal.width ?? ideal, height: proposal.height ?? 44)
  }

  func placeSubviews(in bounds: CGRect, proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) {
    guard subviews.count == 3 else { return }
    let leading = subviews[0]
    let title = subviews[1]
    let trailing = subviews[2]
    let trailingWidth = trailing.sizeThatFits(.unspecified).width
    let leadingIdeal = leading.sizeThatFits(.unspecified).width
    let leadingMinimum = leading.sizeThatFits(ProposedViewSize(width: 0, height: nil)).width
    let reserve = max(minSide, trailingWidth, leadingMinimum) + spacing
    let titleWidth = max(0, min(title.sizeThatFits(.unspecified).width, bounds.width - reserve * 2))
    let side = max(0, (bounds.width - titleWidth) / 2 - spacing)
    let leadingProposal = ProposedViewSize(width: min(side, leadingIdeal), height: nil)
    let leadingWidth = leading.sizeThatFits(leadingProposal).width
    let titleInset = max(leadingWidth, trailingWidth) + spacing
    leading.place(
      at: CGPoint(x: bounds.minX, y: bounds.minY),
      anchor: .topLeading,
      proposal: ProposedViewSize(width: leadingProposal.width, height: bounds.height)
    )
    title.place(
      at: CGPoint(x: bounds.minX + titleInset, y: bounds.minY),
      anchor: .topLeading,
      proposal: ProposedViewSize(width: max(0, bounds.width - titleInset * 2), height: bounds.height)
    )
    trailing.place(
      at: CGPoint(x: bounds.maxX - trailingWidth, y: bounds.minY),
      anchor: .topLeading,
      proposal: ProposedViewSize(width: trailingWidth, height: bounds.height)
    )
  }
}

public struct HeaderTitle: View {
  let title: Text
  let subtitle: Text?

  @Environment(\.headerProgress) private var progress

  public init(_ title: LocalizedStringKey, subtitle: LocalizedStringKey? = nil) {
    self.title = Text(title)
    self.subtitle = subtitle.map { Text($0) }
  }

  public init(verbatim title: String, subtitle: String? = nil) {
    self.title = Text(verbatim: title)
    self.subtitle = subtitle.map { Text(verbatim: $0) }
  }

  public var body: some View {
    VStack(spacing: 0) {
      title
        .scaledFont(.base, weight: .semibold)
        .foregroundStyle(Color.label)
      if let subtitle {
        subtitle
          .scaledFont(.xs2)
          .foregroundStyle(Color.labelSecondary)
      }
    }
    .lineLimit(1)
    .multilineTextAlignment(.center)
    .opacity(progress ?? 1)
    .accessibilityElement(children: .combine)
    .accessibilityHidden((progress ?? 1) < 0.5)
  }
}

public struct HeaderLargeTitle: View {
  let title: Text
  let subtitle: Text?

  @Environment(\.headerReport) private var report

  public init(_ title: LocalizedStringKey, subtitle: LocalizedStringKey? = nil) {
    self.title = Text(title)
    self.subtitle = subtitle.map { Text($0) }
  }

  public init(verbatim title: String, subtitle: String? = nil) {
    self.title = Text(verbatim: title)
    self.subtitle = subtitle.map { Text(verbatim: $0) }
  }

  public var body: some View {
    VStack(alignment: .leading, spacing: 2) {
      title
        .scaledFont(.xl3, weight: .bold)
        .foregroundStyle(Color.label)
        .accessibilityAddTraits(.isHeader)
      if let subtitle {
        subtitle
          .scaledFont(.sm)
          .foregroundStyle(Color.labelSecondary)
      }
    }
    .lineLimit(2)
    .padding(.horizontal, 16)
    .padding(.top, 4)
    .padding(.bottom, 8)
    .frame(maxWidth: .infinity, alignment: .leading)
    .onGeometryChange(for: CGFloat.self) { proxy in
      HeaderMath.progress(minY: proxy.frame(in: .scrollView).minY, height: proxy.size.height)
    } action: { value in
      report?(value)
    }
  }
}

public struct HeaderBack: View {
  let label: Text?
  let action: (() -> Void)?

  @Environment(\.dismiss) private var dismiss
  @Environment(\.isEnabled) private var isEnabled

  public init(_ label: LocalizedStringKey? = nil, action: (() -> Void)? = nil) {
    self.label = label.map { Text($0) }
    self.action = action
  }

  public init(verbatim label: String, action: (() -> Void)? = nil) {
    self.label = Text(verbatim: label)
    self.action = action
  }

  public var body: some View {
    Button {
      if let action {
        action()
      } else {
        dismiss()
      }
    } label: {
      EmptyView()
    }
    .buttonStyle(PressReader { pressed in
      HStack(spacing: 2) {
        Ph.caretLeft.bold
          .frame(width: 20, height: 20)
          .flipsForRightToLeftLayoutDirection(true)
        if let label {
          label
            .scaledFont(.base)
            .lineLimit(1)
        }
      }
      .foregroundStyle(!isEnabled ? Color.labelQuaternary : pressed ? .link.opacity(0.4) : .link)
      .padding(.horizontal, 4)
      .frame(minWidth: 44, minHeight: 44, alignment: .leading)
      .contentShape(Rectangle())
    })
    .accessibilityLabel(label ?? Text("Back"))
  }
}

public struct HeaderActions<Content: View>: View {
  let content: Content

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    HStack(spacing: 4) {
      content
    }
    .buttonStyle(.variant(.ghost, size: .icon))
  }
}

public struct HeaderScrollView<HeaderContent: View, Content: View>: View {
  let header: HeaderContent
  let content: Content

  @State private var progress: CGFloat?

  public init(@ViewBuilder content: () -> Content, @ViewBuilder header: () -> HeaderContent) {
    self.content = content()
    self.header = header()
  }

  public var body: some View {
    VStack(spacing: 0) {
      header
        .environment(\.headerProgress, progress)
        .zIndex(1)
      KeyboardScrollView {
        VStack(alignment: .leading, spacing: 0) {
          content
        }
      }
      .environment(\.headerReport) { value in
        if progress != value { progress = value }
      }
    }
  }
}
```

```swift title="swift/Components/Item.swift"
import SwiftUI

public enum ItemVariant: CaseIterable, Sendable {
  case `default`, outline, muted
}

public enum ItemSize: CaseIterable, Sendable {
  case `default`, sm, xs

  var horizontalPadding: CGFloat {
    switch self {
    case .default: 16
    case .sm: 14
    case .xs: 12
    }
  }

  var verticalPadding: CGFloat {
    switch self {
    case .default: 14
    case .sm: 12
    case .xs: 10
    }
  }

  var gap: CGFloat {
    self == .xs ? 10 : 14
  }

  var groupGap: CGFloat {
    switch self {
    case .default: 16
    case .sm: 10
    case .xs: 8
    }
  }

  var mediaImage: CGFloat {
    switch self {
    case .default: 40
    case .sm: 32
    case .xs: 24
    }
  }
}

public enum ItemGroupVariant: CaseIterable, Sendable {
  case `default`, inset
}

extension EnvironmentValues {
  @Entry var itemSize: ItemSize = .default
  @Entry var itemGroupInset = false
  @Entry var itemHasDescription = false
}

struct ItemGapKey: PreferenceKey {
  static var defaultValue: CGFloat? { nil }

  static func reduce(value: inout CGFloat?, nextValue: () -> CGFloat?) {
    guard let next = nextValue() else { return }
    value = min(value ?? next, next)
  }
}

struct ItemDescriptionKey: PreferenceKey {
  static var defaultValue: Bool { false }

  static func reduce(value: inout Bool, nextValue: () -> Bool) {
    value = value || nextValue()
  }
}

enum ItemSlot: Sendable {
  case media, content, actions, fullRow, other
}

struct ItemSlotKey: LayoutValueKey {
  static let defaultValue = ItemSlot.other
}

public struct ItemGroup<Content: View>: View {
  let variant: ItemGroupVariant
  let content: Content

  @State private var gap: CGFloat?

  public init(_ variant: ItemGroupVariant = .default, @ViewBuilder content: () -> Content) {
    self.variant = variant
    self.content = content()
  }

  public var body: some View {
    let inset = variant == .inset
    let shape = RoundedRectangle(cornerRadius: Radius.xl2, style: .continuous)
    VStack(alignment: .leading, spacing: inset ? 0 : gap ?? ItemSize.default.groupGap) {
      content
    }
    .frame(maxWidth: .infinity, alignment: .leading)
    .environment(\.itemGroupInset, inset)
    .onPreferenceChange(ItemGapKey.self) { gap = $0 }
    .transformPreference(ItemGapKey.self) { $0 = nil }
    .background(inset ? Color.surfaceSecondary : .clear, in: shape)
    .clipShape(inset ? AnyShape(shape) : AnyShape(Rectangle()))
    .accessibilityElement(children: .contain)
  }
}

public struct ItemSeparator: View {
  @Environment(\.itemGroupInset) private var inset

  public init() {}

  public var body: some View {
    Separator()
      .padding(.vertical, inset ? 0 : 8)
      .padding(.leading, inset ? 16 : 0)
  }
}

public struct Item<Content: View>: View {
  let variant: ItemVariant
  let size: ItemSize
  let action: (() -> Void)?
  let content: Content

  @State private var hasDescription = false
  @Environment(\.itemGroupInset) private var inset

  public init(
    _ variant: ItemVariant = .default,
    size: ItemSize = .default,
    action: (() -> Void)? = nil,
    @ViewBuilder content: () -> Content
  ) {
    self.variant = variant
    self.size = size
    self.action = action
    self.content = content()
  }

  public var body: some View {
    Group {
      if let action {
        Button(action: action) {
          surface
        }
        .buttonStyle(ItemButtonStyle(variant: variant, inset: inset))
      } else {
        surface.background(ItemBackground(variant: variant, inset: inset, pressed: false))
      }
    }
    .preference(key: ItemGapKey.self, value: size.groupGap)
  }

  private var surface: some View {
    ItemLayout(gap: size.gap, topAlignMedia: hasDescription) {
      content
    }
    .scaledFont(.base)
    .foregroundStyle(Color.label)
    .padding(.horizontal, size.horizontalPadding)
    .padding(.vertical, size.verticalPadding)
    .frame(maxWidth: .infinity, alignment: .leading)
    .environment(\.itemSize, size)
    .environment(\.itemHasDescription, hasDescription)
    .onPreferenceChange(ItemDescriptionKey.self) { hasDescription = $0 }
    .contentShape(Rectangle())
  }
}

private struct ItemBackground: View {
  let variant: ItemVariant
  let inset: Bool
  let pressed: Bool

  var body: some View {
    let shape = RoundedRectangle(cornerRadius: inset ? 0 : Radius.xl, style: .continuous)
    ZStack {
      shape.fill(variant == .muted ? Color.surfaceSecondary.opacity(0.5) : .clear)
      if pressed {
        shape.fill(Color.itemPressed)
      }
      if variant == .outline {
        shape.strokeBorder(Color.separator)
      }
    }
  }
}

private struct ItemButtonStyle: ButtonStyle {
  let variant: ItemVariant
  let inset: Bool

  @Environment(\.isEnabled) private var isEnabled

  func makeBody(configuration: Configuration) -> some View {
    configuration.label
      .background(ItemBackground(variant: variant, inset: inset, pressed: configuration.isPressed && isEnabled))
      .opacity(isEnabled ? 1 : 0.5)
  }
}

struct ItemLayout: Layout {
  var gap: CGFloat
  var topAlignMedia: Bool

  private struct Line {
    var indices: [Int]
    var full: Bool
  }

  private func lines(_ subviews: Subviews) -> [Line] {
    var result: [Line] = []
    var current: [Int] = []
    for index in subviews.indices {
      if subviews[index][ItemSlotKey.self] == .fullRow {
        if !current.isEmpty { result.append(Line(indices: current, full: false)) }
        current = []
        result.append(Line(indices: [index], full: true))
      } else {
        current.append(index)
      }
    }
    if !current.isEmpty { result.append(Line(indices: current, full: false)) }
    return result
  }

  private func widths(_ line: Line, subviews: Subviews, width: CGFloat?) -> [CGFloat] {
    if line.full {
      return [width ?? subviews[line.indices[0]].sizeThatFits(.unspecified).width]
    }
    let spacing = gap * CGFloat(max(line.indices.count - 1, 0))
    let flexible = line.indices.first { subviews[$0][ItemSlotKey.self] == .content }
    var fixed: [Int: CGFloat] = [:]
    for index in line.indices where index != flexible {
      fixed[index] = subviews[index].sizeThatFits(.unspecified).width
    }
    let used = fixed.values.reduce(0, +) + spacing
    return line.indices.map { index in
      if index == flexible {
        if let width { return max(width - used, 0) }
        return subviews[index].sizeThatFits(.unspecified).width
      }
      return fixed[index] ?? 0
    }
  }

  func sizeThatFits(proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) -> CGSize {
    var height: CGFloat = 0
    var widest: CGFloat = 0
    let all = lines(subviews)
    for (position, line) in all.enumerated() {
      let sizes = widths(line, subviews: subviews, width: proposal.width)
      var lineHeight: CGFloat = 0
      for (index, width) in zip(line.indices, sizes) {
        lineHeight = max(lineHeight, subviews[index].sizeThatFits(ProposedViewSize(width: width, height: nil)).height)
      }
      let spacing = gap * CGFloat(max(line.indices.count - 1, 0))
      widest = max(widest, sizes.reduce(0, +) + (line.full ? 0 : spacing))
      height += lineHeight + (position > 0 ? gap : 0)
    }
    return CGSize(width: proposal.width ?? widest, height: height)
  }

  func placeSubviews(in bounds: CGRect, proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) {
    var y = bounds.minY
    for line in lines(subviews) {
      let sizes = widths(line, subviews: subviews, width: bounds.width)
      var heights: [CGFloat] = []
      for (index, width) in zip(line.indices, sizes) {
        heights.append(subviews[index].sizeThatFits(ProposedViewSize(width: width, height: nil)).height)
      }
      let lineHeight = heights.max() ?? 0
      var x = bounds.minX
      for (offset, index) in line.indices.enumerated() {
        let width = sizes[offset]
        let height = heights[offset]
        let top = topAlignMedia && subviews[index][ItemSlotKey.self] == .media
        let originY = top ? y + 2 : y + (lineHeight - height) / 2
        subviews[index].place(
          at: CGPoint(x: x, y: originY),
          anchor: .topLeading,
          proposal: ProposedViewSize(width: width, height: height)
        )
        x += width + gap
      }
      y += lineHeight + gap
    }
  }
}

public enum ItemMediaVariant: CaseIterable, Sendable {
  case `default`, icon, image
}

public struct ItemMedia<Content: View>: View {
  let variant: ItemMediaVariant
  let content: Content

  @Environment(\.itemSize) private var size

  public init(_ variant: ItemMediaVariant = .default, @ViewBuilder content: () -> Content) {
    self.variant = variant
    self.content = content()
  }

  public var body: some View {
    Group {
      switch variant {
      case .default:
        HStack(spacing: 8) { content }
      case .icon:
        content.frame(width: 16, height: 16)
      case .image:
        content
          .scaledToFill()
          .frame(width: size.mediaImage, height: size.mediaImage)
          .clipShape(RoundedRectangle(cornerRadius: size == .xs ? Radius.sm : Radius.md, style: .continuous))
      }
    }
    .accessibilityHidden(variant != .default)
    .layoutValue(key: ItemSlotKey.self, value: .media)
  }
}

public struct ItemContent<Content: View>: View {
  let content: Content

  @Environment(\.itemSize) private var size

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    VStack(alignment: .leading, spacing: size == .xs ? 2 : 4) {
      content
    }
    .frame(maxWidth: .infinity, alignment: .leading)
    .layoutValue(key: ItemSlotKey.self, value: .content)
  }
}

public struct ItemTitle<Content: View>: View {
  let content: Content

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    HStack(spacing: 8) {
      content
    }
    .scaledTextStyle(.base, weight: .semibold)
    .foregroundStyle(Color.label)
    .lineLimit(1)
    .accessibilityElement(children: .combine)
  }
}

extension ItemTitle where Content == Text {
  public init(_ title: LocalizedStringKey) {
    self.init { Text(title) }
  }

  public init(verbatim title: String) {
    self.init { Text(verbatim: title) }
  }
}

public struct ItemDescription: View {
  let text: Text

  public init(_ description: LocalizedStringKey) {
    text = Text(description)
  }

  public init(verbatim description: String) {
    text = Text(verbatim: description)
  }

  public var body: some View {
    text
      .scaledTextStyle(.sm)
      .foregroundStyle(Color.labelSecondary)
      .multilineTextAlignment(.leading)
      .lineLimit(2)
      .fixedSize(horizontal: false, vertical: true)
      .preference(key: ItemDescriptionKey.self, value: true)
  }
}

public struct ItemActions<Content: View>: View {
  let content: Content

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    HStack(spacing: 8) {
      content
    }
    .fixedSize()
    .layoutValue(key: ItemSlotKey.self, value: .actions)
  }
}

public struct ItemHeader<Content: View>: View {
  let content: Content

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    SpaceBetween(spacing: 8) {
      content
    }
    .frame(maxWidth: .infinity)
    .layoutValue(key: ItemSlotKey.self, value: .fullRow)
  }
}

public struct ItemFooter<Content: View>: View {
  let content: Content

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    SpaceBetween(spacing: 8) {
      content
    }
    .frame(maxWidth: .infinity)
    .layoutValue(key: ItemSlotKey.self, value: .fullRow)
  }
}

struct SpaceBetween: Layout {
  var spacing: CGFloat

  func sizeThatFits(proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) -> CGSize {
    let sizes = subviews.map { $0.sizeThatFits(.unspecified) }
    let natural = sizes.reduce(0) { $0 + $1.width } + spacing * CGFloat(max(subviews.count - 1, 0))
    return CGSize(width: proposal.width ?? natural, height: sizes.map(\.height).max() ?? 0)
  }

  func placeSubviews(in bounds: CGRect, proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) {
    let sizes = subviews.map { $0.sizeThatFits(.unspecified) }
    let total = sizes.reduce(0) { $0 + $1.width }
    let gaps = CGFloat(max(subviews.count - 1, 0))
    let gap = subviews.count > 1 ? max(spacing, (bounds.width - total) / gaps) : 0
    var x = bounds.minX
    for (index, view) in subviews.enumerated() {
      let size = sizes[index]
      view.place(
        at: CGPoint(x: x, y: bounds.midY - size.height / 2),
        anchor: .topLeading,
        proposal: ProposedViewSize(size)
      )
      x += size.width + gap
    }
  }
}
```

```swift title="swift/Components/KeyboardScrollView.swift"
import SwiftUI
import UIKit

public struct KeyboardScrollView<Content: View>: View {
  let showsIndicators: Bool
  let content: Content

  public init(showsIndicators: Bool = true, @ViewBuilder content: () -> Content) {
    self.showsIndicators = showsIndicators
    self.content = content()
  }

  public var body: some View {
    ScrollView(.vertical, showsIndicators: showsIndicators) {
      content
        .frame(maxWidth: .infinity, alignment: .topLeading)
        .background {
          Color.clear
            .contentShape(Rectangle())
            .onTapGesture { KeyboardScrollView.dismissKeyboard() }
        }
    }
    .scrollDismissesKeyboard(.interactively)
  }

  @MainActor
  static func dismissKeyboard() {
    UIApplication.shared.sendAction(#selector(UIResponder.resignFirstResponder), to: nil, from: nil, for: nil)
  }
}
```

```swift title="swift/Components/Overlay.swift"
import PhosphorSwift
import Observation
import SwiftUI

public enum PopupAlignment: Sendable, CaseIterable {
  case start, center, end
}

struct OverlayDismiss: Sendable {
  let action: @MainActor @Sendable () -> Void

  @MainActor func callAsFunction() {
    action()
  }
}

extension EnvironmentValues {
  @Entry var overlayDismiss: OverlayDismiss? = nil
}

private var instantTransaction: Transaction {
  var transaction = Transaction()
  transaction.disablesAnimations = true
  return transaction
}

struct CoverPresenter<Cover: View>: ViewModifier {
  @Binding var isPresented: Bool
  var enter: Animation = .easeOut(duration: 0.15)
  var exit: Animation = .easeIn(duration: 0.1)
  @ViewBuilder let cover: (Bool) -> Cover

  @State private var presented = false
  @State private var visible = false

  func body(content: Content) -> some View {
    let binding = $isPresented
    content
      .fullScreenCover(isPresented: coverBinding) {
        cover(visible)
          .environment(\.overlayDismiss, OverlayDismiss { binding.wrappedValue = false })
          .presentationBackground(.clear)
          .onAppear {
            withAnimation(enter) { visible = true }
          }
      }
      .onChange(of: isPresented, initial: true) { _, value in
        if value {
          withTransaction(instantTransaction) { presented = true }
        } else if presented {
          withAnimation(exit) {
            visible = false
          } completion: {
            withTransaction(instantTransaction) { presented = false }
          }
        }
      }
  }

  private var coverBinding: Binding<Bool> {
    Binding(
      get: { presented },
      set: { value in
        presented = value
        if !value {
          visible = false
          isPresented = false
        }
      }
    )
  }
}

struct PopupLayout: Layout {
  var anchor: CGRect
  var side: Edge
  var align: PopupAlignment
  var sideOffset: CGFloat
  var alignOffset: CGFloat
  var matchWidth: Bool
  var minWidth: CGFloat
  var maxHeight: CGFloat
  var margin: CGFloat = 8

  func sizeThatFits(proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) -> CGSize {
    proposal.replacingUnspecifiedDimensions()
  }

  func placeSubviews(in bounds: CGRect, proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) {
    guard let view = subviews.first else { return }
    let anchor = anchor.offsetBy(dx: bounds.minX, dy: bounds.minY)
    let maxWidth = max(0, bounds.width - margin * 2)
    var width: CGFloat
    if matchWidth {
      width = max(anchor.width, minWidth)
    } else {
      width = max(view.sizeThatFits(ProposedViewSize(width: nil, height: nil)).width, minWidth)
    }
    width = min(width, maxWidth)
    let natural = view.sizeThatFits(ProposedViewSize(width: width, height: nil))
    let vertical = side == .top || side == .bottom
    let before = vertical
      ? anchor.minY - sideOffset - bounds.minY - margin
      : anchor.minX - sideOffset - bounds.minX - margin
    let after = vertical
      ? bounds.maxY - margin - anchor.maxY - sideOffset
      : bounds.maxX - margin - anchor.maxX - sideOffset
    let extent = vertical ? natural.height : natural.width
    var resolved = side
    switch side {
    case .bottom where extent > after && before > after: resolved = .top
    case .top where extent > before && after > before: resolved = .bottom
    case .trailing where extent > after && before > after: resolved = .leading
    case .leading where extent > before && after > before: resolved = .trailing
    default: break
    }
    var height = natural.height
    let space: CGFloat
    switch resolved {
    case .top, .leading: space = before
    case .bottom, .trailing: space = after
    }
    if vertical {
      height = min(height, maxHeight, max(space, 0))
    } else {
      height = min(height, maxHeight, bounds.height - margin * 2)
      width = min(width, max(space, 0))
    }
    var x: CGFloat
    var y: CGFloat
    if vertical {
      switch align {
      case .start: x = anchor.minX + alignOffset
      case .center: x = anchor.midX - width / 2 + alignOffset
      case .end: x = anchor.maxX - width - alignOffset
      }
      y = resolved == .bottom ? anchor.maxY + sideOffset : anchor.minY - sideOffset - height
    } else {
      switch align {
      case .start: y = anchor.minY + alignOffset
      case .center: y = anchor.midY - height / 2 + alignOffset
      case .end: y = anchor.maxY - height - alignOffset
      }
      x = resolved == .trailing ? anchor.maxX + sideOffset : anchor.minX - sideOffset - width
    }
    x = min(max(x, bounds.minX + margin), bounds.maxX - margin - width)
    y = min(max(y, bounds.minY + margin), bounds.maxY - margin - height)
    view.place(
      at: CGPoint(x: x, y: y),
      anchor: .topLeading,
      proposal: ProposedViewSize(width: width, height: height)
    )
  }
}

struct PopupPresenter<Popup: View>: ViewModifier {
  @Binding var isPresented: Bool
  var side: Edge = .bottom
  var align: PopupAlignment = .start
  var sideOffset: CGFloat = 4
  var alignOffset: CGFloat = 0
  var matchWidth = false
  var minWidth: CGFloat = 0
  var maxHeight: CGFloat = .infinity
  @ViewBuilder let popup: () -> Popup

  @State private var anchor = PopupAnchor()

  func body(content: Content) -> some View {
    content
      .onGeometryChange(for: CGRect.self) { proxy in
        proxy.frame(in: .global)
      } action: { frame in
        anchor.frame = frame
      }
      .modifier(
        CoverPresenter(isPresented: $isPresented) { visible in
          PopupCanvas(
            anchor: anchor,
            side: side,
            align: align,
            sideOffset: sideOffset,
            alignOffset: alignOffset,
            matchWidth: matchWidth,
            minWidth: minWidth,
            maxHeight: maxHeight,
            visible: visible,
            popup: popup
          )
        }
      )
  }
}

@Observable
final class PopupAnchor {
  var frame: CGRect = .zero
}

struct PopupCanvas<Popup: View>: View {
  let anchor: PopupAnchor
  let side: Edge
  let align: PopupAlignment
  let sideOffset: CGFloat
  let alignOffset: CGFloat
  let matchWidth: Bool
  let minWidth: CGFloat
  let maxHeight: CGFloat
  let visible: Bool
  @ViewBuilder let popup: () -> Popup

  @Environment(\.overlayDismiss) private var dismiss
  @Environment(\.accessibilityReduceMotion) private var reduceMotion

  var body: some View {
    GeometryReader { proxy in
      let origin = proxy.frame(in: .global).origin
      PopupLayout(
        anchor: anchor.frame.offsetBy(dx: -origin.x, dy: -origin.y),
        side: side,
        align: align,
        sideOffset: sideOffset,
        alignOffset: alignOffset,
        matchWidth: matchWidth,
        minWidth: minWidth,
        maxHeight: maxHeight
      ) {
        popup()
          .accessibilityAddTraits(.isModal)
          .scaleEffect(visible || reduceMotion ? 1 : 0.96, anchor: scaleAnchor)
          .opacity(visible ? 1 : 0)
      }
    }
    .background {
      Color.clear
        .contentShape(Rectangle())
        .ignoresSafeArea()
        .onTapGesture { dismiss?() }
        .accessibilityHidden(true)
    }
    .accessibilityAction(.escape) { dismiss?() }
  }

  private var scaleAnchor: UnitPoint {
    switch side {
    case .top: .bottom
    case .bottom: .top
    case .leading: .trailing
    case .trailing: .leading
    }
  }
}

extension View {
  func anchoredPopup<Popup: View>(
    isPresented: Binding<Bool>,
    side: Edge = .bottom,
    align: PopupAlignment = .start,
    sideOffset: CGFloat = 4,
    alignOffset: CGFloat = 0,
    matchWidth: Bool = false,
    minWidth: CGFloat = 0,
    maxHeight: CGFloat = .infinity,
    @ViewBuilder popup: @escaping () -> Popup
  ) -> some View {
    modifier(
      PopupPresenter(
        isPresented: isPresented,
        side: side,
        align: align,
        sideOffset: sideOffset,
        alignOffset: alignOffset,
        matchWidth: matchWidth,
        minWidth: minWidth,
        maxHeight: maxHeight,
        popup: popup
      )
    )
  }

  func popupSurface(radius: CGFloat = Radius.xl, shadow: Shadow = .lg) -> some View {
    modifier(PopupSurface(radius: radius, shadow: shadow))
  }
}

struct PopupSurface: ViewModifier {
  let radius: CGFloat
  let shadow: Shadow

  @Environment(\.colorScheme) private var colorScheme

  func body(content: Content) -> some View {
    let shape = RoundedRectangle(cornerRadius: radius, style: .continuous)
    content
      .clipShape(shape)
      .background {
        shape
          .fill(Color.surfaceRaised)
          .shadow(shadow)
      }
      .overlay {
        shape.strokeBorder(Color.label.opacity(colorScheme == .dark ? 0.1 : 0.05))
      }
  }
}

struct OverlayCloseButton: View {
  let label: LocalizedStringKey?

  @Environment(\.overlayDismiss) private var dismiss

  var body: some View {
    if let label {
      Button {
        dismiss?()
      } label: {
        Text(label).font(TextStyle.base.font())
      }
      .buttonStyle(.variant(.plain, size: .sm))
    } else {
      Button {
        dismiss?()
      } label: {
        Ph.x.regular
          .frame(width: 16, height: 16)
          .foregroundStyle(Color.label)
      }
      .buttonStyle(CloseIconButtonStyle())
      .accessibilityLabel(Text("Close"))
    }
  }
}

private struct CloseIconButtonStyle: ButtonStyle {
  func makeBody(configuration: Configuration) -> some View {
    configuration.label
      .frame(width: 32, height: 32)
      .background(configuration.isPressed ? Color.separator : .surfaceTertiary, in: Circle())
      .contentShape(Circle().inset(by: -8))
  }
}

struct ReversedVStack: Layout {
  var spacing: CGFloat

  func sizeThatFits(proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) -> CGSize {
    let width = proposal.width
    var height: CGFloat = 0
    var widest: CGFloat = 0
    for view in subviews {
      let size = view.sizeThatFits(ProposedViewSize(width: width, height: nil))
      height += size.height
      widest = max(widest, size.width)
    }
    height += spacing * CGFloat(max(subviews.count - 1, 0))
    return CGSize(width: width ?? widest, height: height)
  }

  func placeSubviews(in bounds: CGRect, proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) {
    var y = bounds.minY
    for view in subviews.reversed() {
      let size = view.sizeThatFits(ProposedViewSize(width: bounds.width, height: nil))
      view.place(
        at: CGPoint(x: bounds.minX, y: y),
        anchor: .topLeading,
        proposal: ProposedViewSize(width: bounds.width, height: size.height)
      )
      y += size.height + spacing
    }
  }
}

struct ScrimLayer: View {
  let visible: Bool
  var dismissible = true

  @Environment(\.overlayDismiss) private var dismiss

  var body: some View {
    Color.scrim
      .ignoresSafeArea()
      .opacity(visible ? 1 : 0)
      .contentShape(Rectangle())
      .onTapGesture {
        if dismissible { dismiss?() }
      }
      .accessibilityHidden(true)
  }
}
```

```swift title="swift/Components/Screen.swift"
import SwiftUI

extension EnvironmentValues {
  @Entry var screenBackground: Color = .surface
}

public struct Screen<Content: View>: View {
  public enum Background: CaseIterable, Sendable {
    case surface, surfaceSecondary

    var color: Color {
      switch self {
      case .surface: .surface
      case .surfaceSecondary: .surfaceSecondary
      }
    }
  }

  let edges: Edge.Set
  let background: Background
  let content: Content

  public init(
    edges: Edge.Set = .all,
    background: Background = .surface,
    @ViewBuilder content: () -> Content
  ) {
    self.edges = edges
    self.background = background
    self.content = content()
  }

  public var body: some View {
    VStack(spacing: 0) {
      content
    }
    .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .top)
    .ignoresSafeArea(.container, edges: Edge.Set.all.subtracting(edges))
    .foregroundStyle(Color.label)
    .background(background.color.ignoresSafeArea())
    .environment(\.screenBackground, background.color)
  }
}

public struct ScreenContent<Content: View>: View {
  let scroll: Bool
  let padded: Bool
  let content: Content

  public init(scroll: Bool = true, padded: Bool = true, @ViewBuilder content: () -> Content) {
    self.scroll = scroll
    self.padded = padded
    self.content = content()
  }

  public var body: some View {
    if scroll {
      KeyboardScrollView {
        stack
      }
    } else {
      stack
        .frame(maxHeight: .infinity, alignment: .top)
    }
  }

  private var stack: some View {
    VStack(alignment: .leading, spacing: 16) {
      content
    }
    .padding(padded ? 16 : 0)
    .frame(maxWidth: .infinity, alignment: .leading)
  }
}
```

```swift title="swift/Components/Select.swift"
import PhosphorSwift
import SwiftUI

struct SelectContext: @unchecked Sendable {
  var selected: AnyHashable?
  var registering = false
  var select: @MainActor @Sendable (AnyHashable) -> Void = { _ in }
}

extension EnvironmentValues {
  @Entry var select = SelectContext()
}

struct SelectLabelsKey: PreferenceKey {
  static var defaultValue: [AnyHashable: Text] { [:] }

  static func reduce(value: inout [AnyHashable: Text], nextValue: () -> [AnyHashable: Text]) {
    value.merge(nextValue()) { current, _ in current }
  }
}

public enum SelectSize: CaseIterable, Sendable {
  case `default`, sm
}

public struct SelectField<Value: Hashable & Sendable, Content: View>: View {
  public typealias Size = SelectSize

  let selection: Binding<Value?>
  let placeholder: LocalizedStringKey
  let size: Size
  let content: () -> Content

  @State private var open = false
  @State private var labels: [AnyHashable: Text] = [:]
  @Environment(\.isEnabled) private var isEnabled
  @Environment(\.isInvalid) private var invalid
  @Environment(\.colorScheme) private var colorScheme

  public init(
    selection: Binding<Value?>,
    placeholder: LocalizedStringKey = "Select",
    size: Size = .default,
    @ViewBuilder content: @escaping () -> Content
  ) {
    self.selection = selection
    self.placeholder = placeholder
    self.size = size
    self.content = content
  }

  public var body: some View {
    let binding = selection
    let current = binding.wrappedValue.map { AnyHashable($0) }
    let valueText = current.flatMap { labels[$0] }
    let context = SelectContext(
      selected: current,
      select: { value in
        if let value = value.base as? Value { binding.wrappedValue = value }
      }
    )
    ButtonGroupItem(radius: size == .sm ? Radius.md : Radius.lg) { shape in
      Button {
        open = true
      } label: {
        HStack(spacing: 6) {
          (valueText ?? Text(placeholder))
            .font(TextStyle.base.font())
            .tracking(TextStyle.base.letterSpacing)
            .lineLimit(1)
            .foregroundStyle(!isEnabled ? Color.labelQuaternary : valueText == nil ? .labelSecondary : .label)
            .frame(maxWidth: .infinity, alignment: .leading)
          Ph.caretUpDown.regular
            .frame(width: 16, height: 16)
            .foregroundStyle(Color.labelSecondary)
            .accessibilityHidden(true)
        }
        .padding(.horizontal, 12)
        .frame(height: size == .sm ? 36 : 44)
        .background(background, in: shape)
        .overlay {
          if invalid {
            shape.strokeBorder(Color.danger)
          }
        }
        .contentShape(shape)
      }
      .buttonStyle(SelectTriggerStyle())
    }
    .accessibilityHint(Text("Shows options"))
    .background {
      VStack(spacing: 0) { content() }
        .environment(\.select, SelectContext(registering: true))
        .hidden()
        .frame(width: 0, height: 0)
        .clipped()
        .accessibilityHidden(true)
        .allowsHitTesting(false)
    }
    .onPreferenceChange(SelectLabelsKey.self) { value in
      labels = value
    }
    .anchoredPopup(
      isPresented: $open,
      side: .bottom,
      align: .center,
      matchWidth: true,
      minWidth: 144
    ) {
      SelectPanel(content: content)
        .environment(\.select, context)
    }
  }

  private var background: Color {
    if !isEnabled { return .controlDisabled }
    if invalid { return .danger.opacity(colorScheme == .dark ? 0.1 : 0.05) }
    return .control
  }
}

private struct SelectTriggerStyle: ButtonStyle {
  func makeBody(configuration: Configuration) -> some View {
    configuration.label.opacity(configuration.isPressed ? 0.8 : 1)
  }
}

struct SelectPanel<Content: View>: View {
  @ViewBuilder let content: () -> Content

  var body: some View {
    let stack = VStack(alignment: .leading, spacing: 0) {
      content()
    }
    .padding(6)
    ViewThatFits(in: .vertical) {
      stack
      ScrollView { stack }
    }
    .font(TextStyle.base.font())
    .tracking(TextStyle.base.letterSpacing)
    .foregroundStyle(Color.label)
    .popupSurface(radius: Radius.xl)
    .accessibilityElement(children: .contain)
  }
}

public struct SelectItem: View {
  let value: AnyHashable
  let title: Text

  @Environment(\.select) private var select
  @Environment(\.overlayDismiss) private var dismiss

  public init<Value: Hashable & Sendable>(_ title: LocalizedStringKey, value: Value) {
    self.value = AnyHashable(value)
    self.title = Text(title)
  }

  public init<Value: Hashable & Sendable>(verbatim title: String, value: Value) {
    self.value = AnyHashable(value)
    self.title = Text(verbatim: title)
  }

  public var body: some View {
    if select.registering {
      Color.clear
        .frame(width: 0, height: 0)
        .preference(key: SelectLabelsKey.self, value: [value: title])
    } else {
      let selected = select.selected == value
      Button {
        select.select(value)
        dismiss?()
      } label: {
        title
      }
      .buttonStyle(MenuRowStyle(trailing: 32))
      .overlay(alignment: .trailing) {
        if selected {
          Ph.check.regular
            .frame(width: 16, height: 16)
            .foregroundStyle(Color.link)
            .padding(.trailing, 8)
            .accessibilityHidden(true)
        }
      }
      .accessibilityAddTraits(selected ? .isSelected : [])
    }
  }
}

public struct SelectGroup<Content: View>: View {
  let content: Content

  @Environment(\.select) private var select

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    VStack(alignment: .leading, spacing: 0) { content }
  }
}

public struct SelectLabel: View {
  let title: LocalizedStringKey

  @Environment(\.select) private var select

  public init(_ title: LocalizedStringKey) {
    self.title = title
  }

  public var body: some View {
    if !select.registering {
      Text(title)
        .font(TextStyle.xs.font(weight: .semibold))
        .tracking(TextStyle.xs.letterSpacing)
        .foregroundStyle(Color.labelSecondary)
        .padding(.horizontal, 12)
        .padding(.vertical, 10)
        .frame(maxWidth: .infinity, alignment: .leading)
        .accessibilityAddTraits(.isHeader)
    }
  }
}

public struct SelectSeparator: View {
  @Environment(\.select) private var select

  public init() {}

  public var body: some View {
    if !select.registering {
      Rectangle()
        .fill(Color.separator)
        .frame(height: 1)
        .padding(.vertical, 6)
        .padding(.horizontal, -6)
        .accessibilityHidden(true)
    }
  }
}
```

```swift title="swift/Components/Separator.swift"
import SwiftUI

public struct Separator: View {
  let orientation: Axis

  public init(_ orientation: Axis = .horizontal) {
    self.orientation = orientation
  }

  public var body: some View {
    Rectangle()
      .fill(Color.separator)
      .frame(width: orientation == .vertical ? 1 : nil, height: orientation == .horizontal ? 1 : nil)
      .frame(maxWidth: orientation == .horizontal ? .infinity : nil, maxHeight: orientation == .vertical ? .infinity : nil)
      .accessibilityHidden(true)
  }
}
```

```swift title="swift/Components/TextVariant.swift"
import SwiftUI

public enum TextVariant: CaseIterable, Sendable {
  case `default`, h1, h2, h3, h4, p, blockquote, code, lead, large, small, muted

  var style: TextStyle {
    switch self {
    case .h1: .xl3
    case .h2: .xl2
    case .h3: .xl
    case .h4, .lead, .large: .lg
    case .code, .small, .muted: .sm
    default: .base
    }
  }

  var weight: Font.Weight {
    switch self {
    case .h1, .h2: .bold
    case .h3, .h4, .large, .code: .semibold
    case .small: .medium
    default: .regular
    }
  }

  var color: Color {
    switch self {
    case .lead, .muted: .labelSecondary
    default: .label
    }
  }

  var isHeading: Bool {
    switch self {
    case .h1, .h2, .h3, .h4: true
    default: false
    }
  }
}

private struct TextVariantModifier: ViewModifier {
  let variant: TextVariant

  func body(content: Content) -> some View {
    switch variant {
    case .blockquote:
      styled(content)
        .italic()
        .padding(.leading, 12)
        .overlay(alignment: .leading) {
          Rectangle().fill(Color.separator).frame(width: 2)
        }
        .padding(.top, 16)
    case .code:
      styled(content)
        .monospaced()
        .padding(.horizontal, 4)
        .padding(.vertical, 2)
        .background(Color.surfaceSecondary, in: RoundedRectangle(cornerRadius: Radius.sm, style: .continuous))
    case .p:
      styled(content).padding(.top, 12)
    default:
      styled(content)
    }
  }

  private func styled(_ content: Content) -> some View {
    content
      .scaledTextStyle(variant.style, weight: variant.weight)
      .foregroundStyle(variant.color)
      .accessibilityAddTraits(variant.isHeading ? .isHeader : [])
  }
}

extension View {
  public func textVariant(_ variant: TextVariant) -> some View {
    modifier(TextVariantModifier(variant: variant))
  }
}

private struct ScaledTextStyleModifier: ViewModifier {
  let style: TextStyle
  let weight: Font.Weight

  @ScaledMetric(relativeTo: .body) private var scale: CGFloat = 1

  func body(content: Content) -> some View {
    let size = style.size * scale
    let lineSpacing = max(0, style.lineHeight * scale - UIFont.systemFont(ofSize: size).lineHeight)
    content
      .font(.system(size: size, weight: weight))
      .tracking(style.letterSpacing)
      .lineSpacing(lineSpacing)
      .padding(.vertical, lineSpacing / 2)
  }
}

extension View {
  func scaledTextStyle(_ style: TextStyle, weight: Font.Weight = .regular) -> some View {
    modifier(ScaledTextStyleModifier(style: style, weight: weight))
  }

  func scaledFont(_ style: TextStyle, weight: Font.Weight = .regular) -> some View {
    modifier(ScaledFontModifier(style: style, weight: weight))
  }
}

private struct ScaledFontModifier: ViewModifier {
  let style: TextStyle
  let weight: Font.Weight

  @ScaledMetric(relativeTo: .body) private var scale: CGFloat = 1

  func body(content: Content) -> some View {
    content
      .font(.system(size: style.size * scale, weight: weight))
      .tracking(style.letterSpacing)
  }
}
```

5. Add the files to your app target.

**Jetpack Compose**

1. Set `minSdk` to 24 or higher and add the dependencies:

```kotlin title="build.gradle.kts"
implementation(platform("androidx.compose:compose-bom:2026.09.00"))
implementation("androidx.compose.foundation:foundation")
implementation("androidx.compose.ui:ui")
implementation("com.adamglin:phosphor-icon-android:1.0.0")
```

2. Copy the theme files every view uses:

```kt title="kotlin/theme/Theme.kt"
package com.esuiss.ui.theme

import androidx.compose.foundation.isSystemInDarkTheme
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.Immutable
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.dropShadow
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.Shape
import androidx.compose.ui.graphics.shadow.Shadow as DropShadow
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.text.style.LineHeightStyle
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.DpOffset
import androidx.compose.ui.unit.em
import androidx.compose.ui.unit.sp

internal fun textStyle(size: Double, lineHeight: Double, letterSpacing: Double) = TextStyle(
    fontSize = size.sp,
    lineHeight = lineHeight.sp,
    letterSpacing = letterSpacing.em,
    lineHeightStyle = LineHeightStyle(
        alignment = LineHeightStyle.Alignment.Center,
        trim = LineHeightStyle.Trim.None,
    ),
)

@Immutable
data class Shadow(
    val offsetX: Dp,
    val offsetY: Dp,
    val blur: Dp,
    val color: Color,
)

fun Modifier.shadow(shadow: Shadow, shape: Shape): Modifier = dropShadow(
    shape,
    DropShadow(
        radius = shadow.blur,
        color = shadow.color,
        offset = DpOffset(shadow.offsetX, shadow.offsetY),
    ),
)

val LocalColors = staticCompositionLocalOf { LightColors }

object EsuissTheme {
    val colors: Colors
        @Composable get() = LocalColors.current

    val typography: Typography
        get() = Typography

    val radius: Radius
        get() = Radius

    val shadows: Shadows
        get() = Shadows
}

@Composable
fun EsuissTheme(
    darkTheme: Boolean = isSystemInDarkTheme(),
    content: @Composable () -> Unit,
) {
    CompositionLocalProvider(
        LocalColors provides if (darkTheme) DarkColors else LightColors,
        content = content,
    )
}
```

```kt title="kotlin/theme/Tokens.kt"
package com.esuiss.ui.theme

import androidx.compose.runtime.Immutable
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.unit.dp

@Immutable
data class Colors(
    val surface: Color,
    val surfaceSecondary: Color,
    val surfaceTertiary: Color,
    val surfaceRaised: Color,
    val label: Color,
    val labelSecondary: Color,
    val labelTertiary: Color,
    val labelQuaternary: Color,
    val control: Color,
    val controlPressed: Color,
    val controlSelected: Color,
    val controlDisabled: Color,
    val onControlSelected: Color,
    val itemPressed: Color,
    val itemSelected: Color,
    val separator: Color,
    val separatorStrong: Color,
    val accent: Color,
    val accentPressed: Color,
    val accentSelected: Color,
    val accentDisabled: Color,
    val onAccent: Color,
    val accentSurface: Color,
    val accentSurfacePressed: Color,
    val link: Color,
    val focus: Color,
    val scrim: Color,
    val media: Color,
    val onMedia: Color,
    val danger: Color,
    val dangerSurface: Color,
    val dangerSurfacePressed: Color,
    val success: Color,
    val successSurface: Color,
    val warning: Color,
    val warningSurface: Color,
    val blue: Color,
    val green: Color,
    val orange: Color,
    val red: Color,
    val yellow: Color,
    val purple: Color,
    val pink: Color,
    val indigo: Color,
    val teal: Color,
    val mint: Color,
    val cyan: Color,
    val brown: Color,
    val gray: Color,
    val isDark: Boolean,
)

val LightColors = Colors(
    surface = Color(0xFFFFFFFF),
    surfaceSecondary = Color(0xFFF5F5F7),
    surfaceTertiary = Color(0xFFE8E8ED),
    surfaceRaised = Color(0xFFFFFFFF),
    label = Color(0xFF1D1D1F),
    labelSecondary = Color(0xFF6E6E73),
    labelTertiary = Color(0xFF86868B),
    labelQuaternary = Color(0xFFD2D2D7),
    control = Color(0xFF000000).copy(alpha = 0.04f),
    controlPressed = Color(0xFF000000).copy(alpha = 0.12f),
    controlSelected = Color(0xFF1D1D1F),
    controlDisabled = Color(0xFF000000).copy(alpha = 0.03f),
    onControlSelected = Color(0xFFFFFFFF),
    itemPressed = Color(0xFF000000).copy(alpha = 0.08f),
    itemSelected = Color(0xFF000000).copy(alpha = 0.06f),
    separator = Color(0xFFD2D2D7),
    separatorStrong = Color(0xFF86868B),
    accent = Color(0xFF0071E3),
    accentPressed = Color(0xFF005BB8),
    accentSelected = Color(0xFF0071E3),
    accentDisabled = Color(0xFF0071E3).copy(alpha = 0.4f),
    onAccent = Color(0xFFFFFFFF),
    accentSurface = Color(0xFF0071E3).copy(alpha = 0.09f),
    accentSurfacePressed = Color(0xFF0071E3).copy(alpha = 0.18f),
    link = Color(0xFF0066CC),
    focus = Color(0xFF0071E3),
    scrim = Color(0xFF000000).copy(alpha = 0.48f),
    media = Color(0xFF000000),
    onMedia = Color(0xFFFFFFFF),
    danger = Color(0xFFD0000A),
    dangerSurface = Color(0xFFD70015).copy(alpha = 0.08f),
    dangerSurfacePressed = Color(0xFFD70015).copy(alpha = 0.16f),
    success = Color(0xFF008009),
    successSurface = Color(0xFFEFFAF1),
    warning = Color(0xFFB64400),
    warningSurface = Color(0xFFFFF5EA),
    blue = Color(0xFF007AFF),
    green = Color(0xFF34C759),
    orange = Color(0xFFFF9500),
    red = Color(0xFFFF3B30),
    yellow = Color(0xFFFFCC00),
    purple = Color(0xFFAF52DE),
    pink = Color(0xFFFF2D55),
    indigo = Color(0xFF5856D6),
    teal = Color(0xFF30B0C7),
    mint = Color(0xFF00C7BE),
    cyan = Color(0xFF32ADE6),
    brown = Color(0xFFA2845E),
    gray = Color(0xFF8E8E93),
    isDark = false,
)

val DarkColors = Colors(
    surface = Color(0xFF000000),
    surfaceSecondary = Color(0xFF161617),
    surfaceTertiary = Color(0xFF2C2C2E),
    surfaceRaised = Color(0xFF1D1D1F),
    label = Color(0xFFF5F5F7),
    labelSecondary = Color(0xFFA1A1A6),
    labelTertiary = Color(0xFF86868B),
    labelQuaternary = Color(0xFF424245),
    control = Color(0xFFFFFFFF).copy(alpha = 0.1f),
    controlPressed = Color(0xFFFFFFFF).copy(alpha = 0.22f),
    controlSelected = Color(0xFFF5F5F7),
    controlDisabled = Color(0xFFFFFFFF).copy(alpha = 0.05f),
    onControlSelected = Color(0xFF000000),
    itemPressed = Color(0xFFFFFFFF).copy(alpha = 0.12f),
    itemSelected = Color(0xFFFFFFFF).copy(alpha = 0.1f),
    separator = Color(0xFF424245),
    separatorStrong = Color(0xFF6E6E73),
    accent = Color(0xFF0071E3),
    accentPressed = Color(0xFF004D9E),
    accentSelected = Color(0xFF0071E3),
    accentDisabled = Color(0xFF0071E3).copy(alpha = 0.4f),
    onAccent = Color(0xFFFFFFFF),
    accentSurface = Color(0xFF0071E3).copy(alpha = 0.18f),
    accentSurfacePressed = Color(0xFF0071E3).copy(alpha = 0.3f),
    link = Color(0xFF2997FF),
    focus = Color(0xFF0071E3),
    scrim = Color(0xFF000000).copy(alpha = 0.48f),
    media = Color(0xFF000000),
    onMedia = Color(0xFFFFFFFF),
    danger = Color(0xFFFF5447),
    dangerSurface = Color(0xFFFF453A).copy(alpha = 0.2f),
    dangerSurfacePressed = Color(0xFFFF453A).copy(alpha = 0.36f),
    success = Color(0xFF30D158),
    successSurface = Color(0xFF30D158).copy(alpha = 0.16f),
    warning = Color(0xFFFF9F0A),
    warningSurface = Color(0xFFFF9F0A).copy(alpha = 0.16f),
    blue = Color(0xFF0A84FF),
    green = Color(0xFF30D158),
    orange = Color(0xFFFF9F0A),
    red = Color(0xFFFF453A),
    yellow = Color(0xFFFFD60A),
    purple = Color(0xFFBF5AF2),
    pink = Color(0xFFFF375F),
    indigo = Color(0xFF5E5CE6),
    teal = Color(0xFF40C8E0),
    mint = Color(0xFF66D4CF),
    cyan = Color(0xFF64D2FF),
    brown = Color(0xFFAC8E68),
    gray = Color(0xFF8E8E93),
    isDark = true,
)

object Radius {
    val xs = 3.dp
    val sm = 5.dp
    val md = 8.dp
    val lg = 10.dp
    val xl = 12.dp
    val xl2 = 18.dp
    val xl3 = 28.dp
    val full = 9999.dp
}

object Typography {
    val xs3 = textStyle(11.0, 13.0, 0.006)
    val xs2 = textStyle(12.0, 16.0, 0.0)
    val xs = textStyle(13.0, 18.0, -0.006)
    val sm = textStyle(15.0, 20.0, -0.016)
    val md = textStyle(16.0, 21.0, -0.02)
    val base = textStyle(17.0, 22.0, -0.026)
    val lg = textStyle(20.0, 25.0, -0.023)
    val xl = textStyle(22.0, 28.0, -0.012)
    val xl2 = textStyle(28.0, 34.0, 0.014)
    val xl3 = textStyle(34.0, 41.0, 0.012)

    val all = listOf(xs3, xs2, xs, sm, md, base, lg, xl, xl2, xl3)
}

object Shadows {
    val md = Shadow(2.dp, 4.dp, 12.dp, Color.Black.copy(alpha = 0.08f))
    val lg = Shadow(0.dp, 4.dp, 24.dp, Color.Black.copy(alpha = 0.12f))
}
```

3. Copy the source and every file it uses:

```kt title="kotlin/blocks/NavCategories.kt"
package com.esuiss.ui.blocks

import androidx.compose.foundation.background
import androidx.compose.foundation.clickable
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.interaction.collectIsPressedAsState
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.PaddingValues
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.rememberScrollState
import androidx.compose.foundation.text.BasicText
import androidx.compose.foundation.verticalScroll
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.graphicsLayer
import androidx.compose.ui.graphics.vector.ImageVector
import androidx.compose.ui.semantics.LiveRegionMode
import androidx.compose.ui.semantics.Role
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.heading
import androidx.compose.ui.semantics.liveRegion
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.text.SpanStyle
import androidx.compose.ui.text.buildAnnotatedString
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.withStyle
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.Camera
import com.adamglin.phosphoricons.regular.DeviceMobile
import com.adamglin.phosphoricons.regular.DeviceMobileCamera
import com.adamglin.phosphoricons.regular.DeviceTablet
import com.adamglin.phosphoricons.regular.Headphones
import com.adamglin.phosphoricons.regular.Laptop
import com.adamglin.phosphoricons.regular.Palette
import com.adamglin.phosphoricons.regular.Plug
import com.adamglin.phosphoricons.regular.Sparkle
import com.adamglin.phosphoricons.regular.Watch
import com.esuiss.ui.components.Chip
import com.esuiss.ui.components.ChipGroup
import com.esuiss.ui.components.Screen
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography

private class NavCategory(val label: String, val icon: ImageVector)

private val NavCategoryList = listOf(
    NavCategory("Laptop", PhosphorIcons.Regular.Laptop),
    NavCategory("Phone", PhosphorIcons.Regular.DeviceMobile),
    NavCategory("Pad", PhosphorIcons.Regular.DeviceTablet),
    NavCategory("Watch", PhosphorIcons.Regular.Watch),
    NavCategory("Pods", PhosphorIcons.Regular.Headphones),
    NavCategory("Cases", PhosphorIcons.Regular.DeviceMobileCamera),
    NavCategory("Camera", PhosphorIcons.Regular.Camera),
    NavCategory("Colors", PhosphorIcons.Regular.Palette),
    NavCategory("Pro", PhosphorIcons.Regular.Sparkle),
    NavCategory("Accessories", PhosphorIcons.Regular.Plug),
)

@Composable
fun NavCategories(
    modifier: Modifier = Modifier,
    onSelectCategory: (category: String) -> Unit = {},
    onAskSpecialist: () -> Unit = {},
    onFindStore: () -> Unit = {},
) {
    val colors = EsuissTheme.colors
    var selected by rememberSaveable { mutableStateOf("Phone") }

    Screen(modifier) {
        Column(
            Modifier
                .fillMaxSize()
                .verticalScroll(rememberScrollState())
                .padding(top = 44.dp, bottom = 40.dp),
            verticalArrangement = Arrangement.spacedBy(28.dp),
        ) {
            Column(
                Modifier.padding(horizontal = 24.dp),
                verticalArrangement = Arrangement.spacedBy(20.dp),
            ) {
                Column(verticalArrangement = Arrangement.spacedBy(4.dp)) {
                    BasicText(
                        "Store.",
                        modifier = Modifier.semantics { heading() },
                        style = Typography.xl3.copy(color = colors.label, fontWeight = FontWeight.Bold),
                    )
                    BasicText(
                        "The best way to buy the suiss products you love.",
                        style = Typography.xl.copy(color = colors.labelSecondary),
                    )
                }
                Column(verticalArrangement = Arrangement.spacedBy(6.dp)) {
                    BasicText("Need shopping help?", style = Typography.xs.copy(color = colors.labelSecondary, fontWeight = FontWeight.SemiBold))
                    NavLink("Ask a Specialist ›", onAskSpecialist)
                    NavLink("Visit a suiss Store near you ›", onFindStore)
                }
            }
            ChipGroup(
                value = selected,
                onValueChange = { value ->
                    if (value != null && value != selected) {
                        selected = value
                        onSelectCategory(value)
                    }
                },
                modifier = Modifier
                    .fillMaxWidth()
                    .semantics { contentDescription = "Categories" },
                scrollable = true,
                contentPadding = PaddingValues(horizontal = 24.dp, vertical = 4.dp),
            ) {
                NavCategoryList.forEach { category ->
                    Chip(category.label, category.label, icon = category.icon)
                }
            }
            Column(Modifier.padding(horizontal = 24.dp)) {
                Box(
                    Modifier
                        .fillMaxWidth()
                        .height(1.dp)
                        .background(colors.separator),
                )
                BasicText(
                    buildAnnotatedString {
                        append("The latest. ")
                        withStyle(SpanStyle(color = colors.labelSecondary)) { append("Take a look at what's new in $selected.") }
                    },
                    modifier = Modifier
                        .padding(top = 22.dp)
                        .semantics { liveRegion = LiveRegionMode.Polite },
                    style = Typography.xl2.copy(color = colors.label, fontWeight = FontWeight.SemiBold),
                )
            }
        }
    }
}

@Composable
private fun NavLink(text: String, onClick: () -> Unit) {
    val interaction = remember { MutableInteractionSource() }
    val pressed by interaction.collectIsPressedAsState()
    BasicText(
        text,
        modifier = Modifier
            .graphicsLayer { alpha = if (pressed) 0.5f else 1f }
            .clickable(interactionSource = interaction, indication = null, role = Role.Button, onClick = onClick)
            .padding(vertical = 4.dp),
        style = Typography.sm.copy(color = EsuissTheme.colors.link),
    )
}
```

```kt title="kotlin/components/Button.kt"
package com.esuiss.ui.components

import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.clickable
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.interaction.collectIsPressedAsState
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.RowScope
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.shape.CircleShape
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.foundation.text.BasicText
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.getValue
import androidx.compose.runtime.remember
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.semantics.Role
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.text.style.TextDecoration
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.Colors
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Radius
import com.esuiss.ui.theme.Typography

enum class ButtonVariant { Default, Outline, Secondary, Tinted, Ghost, Plain, Destructive, Link }

enum class ButtonSize(
    val height: Dp,
    val horizontalPadding: Dp,
    val spacing: Dp,
    val iconSize: Dp,
    val blockRadius: Dp,
    val isIcon: Boolean,
) {
    Default(36.dp, 16.dp, 6.dp, 16.dp, Radius.md, false),
    Xs(24.dp, 11.dp, 4.dp, 12.dp, Radius.sm, false),
    Sm(32.dp, 12.dp, 4.dp, 16.dp, Radius.md, false),
    Lg(44.dp, 22.dp, 6.dp, 16.dp, Radius.lg, false),
    Xl(56.dp, 31.dp, 8.dp, 16.dp, Radius.xl, false),
    Icon(36.dp, 0.dp, 6.dp, 16.dp, Radius.md, true),
    IconXs(24.dp, 0.dp, 4.dp, 12.dp, Radius.sm, true),
    IconSm(32.dp, 0.dp, 4.dp, 16.dp, Radius.md, true),
    IconLg(44.dp, 0.dp, 6.dp, 16.dp, Radius.lg, true),
    IconXl(56.dp, 0.dp, 8.dp, 16.dp, Radius.xl, true),
    ;

    val textStyle: TextStyle
        get() = when (this) {
            Xs, IconXs -> Typography.xs2
            Lg, Xl -> Typography.base
            else -> Typography.sm
        }
}

@Composable
fun Button(
    onClick: () -> Unit,
    modifier: Modifier = Modifier,
    variant: ButtonVariant = ButtonVariant.Default,
    size: ButtonSize = ButtonSize.Default,
    block: Boolean = false,
    enabled: Boolean = true,
    content: @Composable RowScope.() -> Unit,
) {
    val colors = EsuissTheme.colors
    val interaction = remember { MutableInteractionSource() }
    val pressed by interaction.collectIsPressedAsState()
    val foreground = buttonForeground(variant, colors, enabled)
    val group = LocalButtonGroup.current?.takeIf { variant != ButtonVariant.Ghost && variant != ButtonVariant.Plain }
    RegisterButtonGroupOutline(group, variant == ButtonVariant.Outline)
    val shape = group.itemShape(if (block) RoundedCornerShape(size.blockRadius) else CircleShape)
    val sizing = when {
        block -> Modifier.fillMaxWidth().height(size.height)
        size.isIcon -> Modifier.size(size.height)
        else -> Modifier.height(size.height)
    }

    Row(
        modifier = modifier
            .then(sizing)
            .clip(shape)
            .background(buttonBackground(variant, colors, pressed && enabled, enabled), shape)
            .then(
                when {
                    variant != ButtonVariant.Outline -> Modifier
                    group != null -> Modifier.buttonGroupEdge(group, colors.separator)
                    else -> Modifier.border(1.dp, colors.separator, shape)
                },
            )
            .clickable(
                interactionSource = interaction,
                indication = null,
                enabled = enabled,
                role = Role.Button,
                onClick = onClick,
            )
            .padding(horizontal = size.horizontalPadding),
        horizontalArrangement = Arrangement.spacedBy(size.spacing, Alignment.CenterHorizontally),
        verticalAlignment = Alignment.CenterVertically,
    ) {
        CompositionLocalProvider(
            LocalButtonGroup provides null,
            LocalContentStyle provides size.textStyle.copy(
                color = foreground,
                textDecoration = if (variant == ButtonVariant.Link && pressed && enabled) {
                    TextDecoration.Underline
                } else {
                    null
                },
            ),
            LocalContentColor provides foreground,
            LocalIconSize provides size.iconSize,
        ) {
            content()
        }
    }
}

@Composable
fun Button(
    text: String,
    onClick: () -> Unit,
    modifier: Modifier = Modifier,
    variant: ButtonVariant = ButtonVariant.Default,
    size: ButtonSize = ButtonSize.Default,
    block: Boolean = false,
    enabled: Boolean = true,
) {
    Button(onClick, modifier, variant, size, block, enabled) {
        BasicText(text, style = LocalContentStyle.current, maxLines = 1)
    }
}

private fun buttonForeground(variant: ButtonVariant, colors: Colors, enabled: Boolean): Color =
    when (variant) {
        ButtonVariant.Default -> colors.onAccent
        ButtonVariant.Outline, ButtonVariant.Secondary, ButtonVariant.Ghost ->
            if (enabled) colors.label else colors.labelQuaternary
        ButtonVariant.Tinted, ButtonVariant.Plain ->
            if (enabled) colors.link else colors.link.copy(alpha = 0.4f)
        ButtonVariant.Destructive ->
            if (enabled) colors.danger else colors.danger.copy(alpha = 0.4f)
        ButtonVariant.Link -> if (enabled) colors.link else colors.labelQuaternary
    }

private fun buttonBackground(variant: ButtonVariant, colors: Colors, pressed: Boolean, enabled: Boolean): Color =
    when (variant) {
        ButtonVariant.Default -> when {
            !enabled -> colors.accentDisabled
            pressed -> colors.accentPressed
            else -> colors.accent
        }
        ButtonVariant.Outline -> when {
            pressed -> colors.itemPressed
            colors.isDark -> Color.Transparent
            else -> colors.surface
        }
        ButtonVariant.Secondary -> when {
            !enabled -> colors.controlDisabled
            pressed -> colors.controlPressed
            else -> colors.control
        }
        ButtonVariant.Tinted -> if (pressed) colors.accentSurfacePressed else colors.accentSurface
        ButtonVariant.Ghost -> if (pressed) colors.itemPressed else Color.Transparent
        ButtonVariant.Plain -> if (pressed) colors.itemPressed else Color.Transparent
        ButtonVariant.Destructive -> if (pressed) colors.dangerSurfacePressed else colors.dangerSurface
        ButtonVariant.Link -> Color.Transparent
    }
```

```kt title="kotlin/components/ButtonGroup.kt"
package com.esuiss.ui.components

import androidx.compose.foundation.background
import androidx.compose.foundation.gestures.Orientation
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.RowScope
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.shape.CircleShape
import androidx.compose.foundation.shape.CornerSize
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.DisposableEffect
import androidx.compose.runtime.Immutable
import androidx.compose.runtime.Stable
import androidx.compose.runtime.compositionLocalOf
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableIntStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.draw.drawBehind
import androidx.compose.ui.draw.drawWithContent
import androidx.compose.ui.geometry.Offset
import androidx.compose.ui.geometry.Size
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.RectangleShape
import androidx.compose.ui.graphics.Shape
import androidx.compose.ui.graphics.drawOutline
import androidx.compose.ui.graphics.drawscope.Stroke
import androidx.compose.ui.graphics.drawscope.translate
import androidx.compose.ui.graphics.takeOrElse
import androidx.compose.ui.layout.Layout
import androidx.compose.ui.layout.Placeable
import androidx.compose.ui.layout.layout
import androidx.compose.ui.layout.layoutId
import androidx.compose.ui.layout.onPlaced
import androidx.compose.ui.platform.LocalLayoutDirection
import androidx.compose.ui.semantics.isTraversalGroup
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.unit.Constraints
import androidx.compose.ui.unit.LayoutDirection
import androidx.compose.ui.unit.constrainHeight
import androidx.compose.ui.unit.constrainWidth
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Radius
import com.esuiss.ui.theme.Typography

enum class ButtonGroupOrientation { Horizontal, Vertical }

@Stable
internal class ButtonGroupState(val orientation: ButtonGroupOrientation) {
    var nested by mutableIntStateOf(0)
    var outlined by mutableIntStateOf(0)
}

internal val LocalButtonGroup = compositionLocalOf<ButtonGroupState?> { null }

internal object ButtonGroupFill

private object ButtonGroupDivider

internal fun ButtonGroupState?.itemShape(default: Shape): Shape = if (this == null) default else RectangleShape

@Immutable
internal class ButtonGroupItem(val shape: Shape, val modifier: Modifier)

@Composable
internal fun rememberButtonGroupItem(group: ButtonGroupState?, default: Shape): ButtonGroupItem {
    var edges by remember { mutableIntStateOf(0) }
    val horizontal = group?.orientation != ButtonGroupOrientation.Vertical
    val rtl = LocalLayoutDirection.current == LayoutDirection.Rtl
    val shape = remember(edges, horizontal) {
        val round = if (horizontal) CornerSize(50) else CornerSize(Radius.xl2)
        val square = CornerSize(0)
        val start = if (edges and 1 != 0) round else square
        val end = if (edges and 2 != 0) round else square
        if (horizontal) {
            RoundedCornerShape(topStart = start, topEnd = end, bottomEnd = end, bottomStart = start)
        } else {
            RoundedCornerShape(topStart = start, topEnd = start, bottomEnd = end, bottomStart = end)
        }
    }
    if (group == null || group.nested > 0) return ButtonGroupItem(default, Modifier)
    return ButtonGroupItem(
        shape = shape,
        modifier = Modifier.onPlaced { coordinates ->
            val parent = coordinates.parentLayoutCoordinates ?: return@onPlaced
            val bounds = parent.localBoundingBoxOf(coordinates, clipBounds = false)
            val first: Boolean
            val last: Boolean
            if (horizontal) {
                val left = bounds.left <= 0.5f
                val right = bounds.right >= parent.size.width - 0.5f
                first = if (rtl) right else left
                last = if (rtl) left else right
            } else {
                first = bounds.top <= 0.5f
                last = bounds.bottom >= parent.size.height - 0.5f
            }
            edges = (if (first) 1 else 0) or (if (last) 2 else 0)
        },
    )
}

internal fun Modifier.buttonGroupEdge(group: ButtonGroupState?, color: Color): Modifier {
    if (group == null) return this
    return drawBehind {
        val stroke = 1.dp.toPx()
        if (group.orientation == ButtonGroupOrientation.Horizontal) {
            val x = if (layoutDirection == LayoutDirection.Rtl) 0f else size.width - stroke
            drawRect(color, Offset(x, 0f), Size(stroke, size.height))
        } else {
            drawRect(color, Offset(0f, size.height - stroke), Size(size.width, stroke))
        }
    }
}

@Composable
internal fun RegisterButtonGroupOutline(group: ButtonGroupState?, outlined: Boolean) {
    DisposableEffect(group, outlined) {
        if (group != null && outlined) group.outlined += 1
        onDispose {
            if (group != null && outlined) group.outlined -= 1
        }
    }
}

@Composable
fun ButtonGroup(
    modifier: Modifier = Modifier,
    orientation: ButtonGroupOrientation = ButtonGroupOrientation.Horizontal,
    content: @Composable () -> Unit,
) {
    val parent = LocalButtonGroup.current
    DisposableEffect(parent) {
        parent?.let { it.nested += 1 }
        onDispose { parent?.let { it.nested -= 1 } }
    }
    val state = remember(orientation) { ButtonGroupState(orientation) }
    val colors = EsuissTheme.colors
    val joined = state.nested == 0
    val horizontal = orientation == ButtonGroupOrientation.Horizontal
    val shape = if (horizontal) CircleShape else RoundedCornerShape(Radius.xl2)
    val outline = colors.separator
    Layout(
        content = {
            CompositionLocalProvider(LocalButtonGroup provides state, content = content)
        },
        modifier = modifier
            .semantics { isTraversalGroup = true }
            .then(
                if (joined) {
                    Modifier
                        .clip(shape)
                        .drawWithContent {
                            drawContent()
                            if (state.outlined > 0) {
                                val stroke = 1.dp.toPx()
                                val inset = stroke / 2
                                val path = shape.createOutline(
                                    Size(size.width - stroke, size.height - stroke),
                                    layoutDirection,
                                    this,
                                )
                                translate(inset, inset) {
                                    drawOutline(path, outline, style = Stroke(stroke))
                                }
                            }
                        }
                } else {
                    Modifier
                },
            ),
    ) { measurables, constraints ->
        val gap = if (joined) 0 else 8.dp.roundToPx()
        val items = measurables.filter { it.layoutId != ButtonGroupDivider }
        if (horizontal) {
            val height = if (constraints.hasFixedHeight) {
                constraints.maxHeight
            } else {
                constraints.constrainHeight(items.maxOfOrNull { it.maxIntrinsicHeight(Constraints.Infinity) } ?: 0)
            }
            val fills = measurables.count { it.layoutId == ButtonGroupFill }
            val placeables = arrayOfNulls<Placeable>(measurables.size)
            var used = 0
            measurables.forEachIndexed { index, measurable ->
                if (measurable.layoutId != ButtonGroupFill) {
                    val placeable = measurable.measure(Constraints(minHeight = height, maxHeight = height))
                    placeables[index] = placeable
                    used += placeable.width
                }
            }
            val gaps = gap * (items.size - 1).coerceAtLeast(0)
            val remaining = if (constraints.hasBoundedWidth) {
                (constraints.maxWidth - used - gaps).coerceAtLeast(0)
            } else {
                0
            }
            measurables.forEachIndexed { index, measurable ->
                if (measurable.layoutId == ButtonGroupFill) {
                    val placeable = if (constraints.hasBoundedWidth) {
                        val width = remaining / fills
                        measurable.measure(Constraints(width, width, height, height))
                    } else {
                        measurable.measure(Constraints(minHeight = height, maxHeight = height))
                    }
                    placeables[index] = placeable
                    used += placeable.width
                }
            }
            val width = constraints.constrainWidth(used + gaps)
            layout(width, height) {
                var x = 0
                measurables.forEachIndexed { index, measurable ->
                    val placeable = placeables[index] ?: return@forEachIndexed
                    val divider = measurable.layoutId == ButtonGroupDivider
                    placeable.placeRelative(x, 0, zIndex = if (divider) 1f else 0f)
                    if (!divider) x += placeable.width + gap
                }
            }
        } else {
            val width = if (constraints.hasFixedWidth) {
                constraints.maxWidth
            } else {
                constraints.constrainWidth(items.maxOfOrNull { it.maxIntrinsicWidth(Constraints.Infinity) } ?: 0)
            }
            val placeables = measurables.map { it.measure(Constraints(minWidth = width, maxWidth = width)) }
            val gaps = gap * (items.size - 1).coerceAtLeast(0)
            val height = constraints.constrainHeight(
                placeables.filterIndexed { index, _ -> measurables[index].layoutId != ButtonGroupDivider }.sumOf { it.height } + gaps,
            )
            layout(width, height) {
                var y = 0
                measurables.forEachIndexed { index, measurable ->
                    val divider = measurable.layoutId == ButtonGroupDivider
                    placeables[index].placeRelative(0, y, zIndex = if (divider) 1f else 0f)
                    if (!divider) y += placeables[index].height + gap
                }
            }
        }
    }
}

@Composable
fun ButtonGroupText(
    modifier: Modifier = Modifier,
    content: @Composable RowScope.() -> Unit,
) {
    val colors = EsuissTheme.colors
    val shape = LocalButtonGroup.current.itemShape(CircleShape)
    Row(
        modifier = modifier
            .clip(shape)
            .background(colors.control, shape)
            .padding(horizontal = 10.dp),
        horizontalArrangement = Arrangement.spacedBy(8.dp),
        verticalAlignment = Alignment.CenterVertically,
    ) {
        CompositionLocalProvider(
            LocalButtonGroup provides null,
            LocalContentStyle provides Typography.sm.copy(color = colors.label),
            LocalContentColor provides colors.label,
            LocalIconSize provides 16.dp,
        ) {
            content()
        }
    }
}

@Composable
fun ButtonGroupSeparator(
    modifier: Modifier = Modifier,
    orientation: Orientation = Orientation.Vertical,
    color: Color = Color.Unspecified,
) {
    val line = color.takeOrElse { EsuissTheme.colors.label.copy(alpha = 0.2f) }
    Box(
        modifier = modifier
            .layoutId(ButtonGroupDivider)
            .then(
                if (orientation == Orientation.Vertical) {
                    Modifier.layout { measurable, constraints ->
                        val placeable = measurable.measure(constraints.copy(minWidth = 0, maxWidth = 0))
                        layout(0, placeable.height) { placeable.place(0, 0) }
                    }
                } else {
                    Modifier.layout { measurable, constraints ->
                        val placeable = measurable.measure(constraints.copy(minHeight = 0, maxHeight = 0))
                        layout(placeable.width, 0) { placeable.place(0, 0) }
                    }
                },
            )
            .drawBehind {
                val stroke = 1.dp.toPx()
                val inset = 9.dp.toPx()
                if (orientation == Orientation.Vertical) {
                    val x = if (layoutDirection == LayoutDirection.Rtl) -stroke else 0f
                    drawRect(line, Offset(x, inset), Size(stroke, (size.height - inset * 2).coerceAtLeast(0f)))
                } else {
                    drawRect(line, Offset(inset, 0f), Size((size.width - inset * 2).coerceAtLeast(0f), stroke))
                }
            },
    )
}
```

```kt title="kotlin/components/Checkbox.kt"
package com.esuiss.ui.components

import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.interaction.collectIsPressedAsState
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.selection.triStateToggleable
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.remember
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.semantics.Role
import androidx.compose.ui.semantics.error
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.state.ToggleableState
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.Check
import com.adamglin.phosphoricons.regular.Minus
import com.esuiss.ui.theme.Colors
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.shadow

@Composable
fun Checkbox(
    checked: Boolean,
    onCheckedChange: ((Boolean) -> Unit)?,
    modifier: Modifier = Modifier,
    enabled: Boolean = LocalFieldState.current.enabled,
    invalid: Boolean = LocalFieldState.current.invalid,
    interactionSource: MutableInteractionSource? = null,
) {
    TriStateCheckbox(
        state = ToggleableState(checked),
        onClick = onCheckedChange?.let { { it(!checked) } },
        modifier = modifier,
        enabled = enabled,
        invalid = invalid,
        interactionSource = interactionSource,
    )
}

@Composable
fun TriStateCheckbox(
    state: ToggleableState,
    onClick: (() -> Unit)?,
    modifier: Modifier = Modifier,
    enabled: Boolean = LocalFieldState.current.enabled,
    invalid: Boolean = LocalFieldState.current.invalid,
    interactionSource: MutableInteractionSource? = null,
) {
    val colors = EsuissTheme.colors
    val haptics = rememberHaptics()
    val source = interactionSource ?: remember { MutableInteractionSource() }
    val pressed by source.collectIsPressedAsState()
    val on = state != ToggleableState.Off
    val shape = RoundedCornerShape(4.dp)
    val look = selectionControlLook(colors, on, enabled, invalid, pressed)
    val toggle = if (onClick != null) {
        Modifier
            .triStateToggleable(
                state = state,
                interactionSource = source,
                indication = null,
                enabled = enabled,
                role = Role.Checkbox,
                onClick = {
                    haptics.toggle(state != ToggleableState.On)
                    onClick()
                },
            )
            .formTouchTarget()
    } else {
        Modifier
    }
    Box(
        modifier = modifier
            .then(toggle)
            .then(if (invalid) Modifier.semantics { error("Invalid") } else Modifier)
            .size(16.dp)
            .then(if (look.shadow) Modifier.shadow(FormShadowXs, shape) else Modifier)
            .background(look.background, shape)
            .border(1.dp, look.border, shape),
        contentAlignment = Alignment.Center,
    ) {
        if (on) {
            Icon(
                if (state == ToggleableState.Indeterminate) PhosphorIcons.Regular.Minus else PhosphorIcons.Regular.Check,
                contentDescription = null,
                size = 14.dp,
                tint = colors.onAccent,
            )
        }
    }
}

internal class SelectionControlLook(val background: Color, val border: Color, val shadow: Boolean)

internal fun selectionControlLook(
    colors: Colors,
    on: Boolean,
    enabled: Boolean,
    invalid: Boolean,
    pressed: Boolean,
): SelectionControlLook = when {
    on && !enabled -> SelectionControlLook(colors.accentDisabled, Color.Transparent, false)
    on -> {
        val color = if (pressed) colors.accentPressed else colors.accent
        SelectionControlLook(color, color, false)
    }
    !enabled -> SelectionControlLook(
        colors.controlDisabled,
        if (colors.isDark) Color.Transparent else colors.label.copy(alpha = 0.1f),
        false,
    )
    colors.isDark -> SelectionControlLook(
        colors.labelQuaternary,
        if (invalid) colors.danger else Color.Transparent,
        false,
    )
    else -> SelectionControlLook(
        if (pressed) colors.control else colors.surface,
        if (invalid) colors.danger else colors.label.copy(alpha = 0.25f),
        true,
    )
}
```

```kt title="kotlin/components/Chip.kt"
package com.esuiss.ui.components

import androidx.compose.animation.core.animateFloatAsState
import androidx.compose.animation.core.tween
import androidx.compose.foundation.background
import androidx.compose.foundation.clickable
import androidx.compose.foundation.horizontalScroll
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.interaction.collectIsPressedAsState
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.FlowRow
import androidx.compose.foundation.layout.PaddingValues
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.rememberScrollState
import androidx.compose.foundation.selection.selectable
import androidx.compose.foundation.selection.selectableGroup
import androidx.compose.foundation.selection.toggleable
import androidx.compose.foundation.shape.CircleShape
import androidx.compose.foundation.text.BasicText
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.getValue
import androidx.compose.runtime.remember
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.graphicsLayer
import androidx.compose.ui.graphics.vector.ImageVector
import androidx.compose.ui.semantics.Role
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Bold
import com.adamglin.phosphoricons.bold.X
import com.esuiss.ui.theme.Colors
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography

enum class ChipSize(
    internal val height: Dp,
    internal val horizontalPadding: Dp,
    internal val iconSize: Dp,
) {
    Default(32.dp, 14.dp, 16.dp),
    Sm(28.dp, 12.dp, 14.dp),
    ;

    internal val textStyle: TextStyle
        get() = if (this == Sm) Typography.xs else Typography.sm
}

private class ChipGroupState(
    val isSelected: (String) -> Boolean,
    val toggle: (String) -> Unit,
    val size: ChipSize,
    val enabled: Boolean,
    val multiple: Boolean,
)

private val LocalChipGroupState = staticCompositionLocalOf<ChipGroupState?> { null }

@Composable
fun ChipGroup(
    value: String?,
    onValueChange: (String?) -> Unit,
    modifier: Modifier = Modifier,
    size: ChipSize = ChipSize.Default,
    scrollable: Boolean = false,
    enabled: Boolean = true,
    contentPadding: PaddingValues = PaddingValues(0.dp),
    content: @Composable () -> Unit,
) {
    val state = ChipGroupState(
        isSelected = { it == value },
        toggle = { onValueChange(if (it == value) null else it) },
        size = size,
        enabled = enabled,
        multiple = false,
    )
    ChipGroupLayout(state, modifier.selectableGroup(), scrollable, contentPadding, content)
}

@Composable
fun ChipGroup(
    values: Set<String>,
    onValuesChange: (Set<String>) -> Unit,
    modifier: Modifier = Modifier,
    size: ChipSize = ChipSize.Default,
    scrollable: Boolean = false,
    enabled: Boolean = true,
    contentPadding: PaddingValues = PaddingValues(0.dp),
    content: @Composable () -> Unit,
) {
    val state = ChipGroupState(
        isSelected = { it in values },
        toggle = { onValuesChange(if (it in values) values - it else values + it) },
        size = size,
        enabled = enabled,
        multiple = true,
    )
    ChipGroupLayout(state, modifier, scrollable, contentPadding, content)
}

@Composable
private fun ChipGroupLayout(
    state: ChipGroupState,
    modifier: Modifier,
    scrollable: Boolean,
    contentPadding: PaddingValues,
    content: @Composable () -> Unit,
) {
    CompositionLocalProvider(LocalChipGroupState provides state) {
        if (scrollable) {
            Row(
                modifier = modifier
                    .horizontalScroll(rememberScrollState())
                    .padding(contentPadding),
                horizontalArrangement = Arrangement.spacedBy(8.dp),
                verticalAlignment = Alignment.CenterVertically,
            ) {
                content()
            }
        } else {
            FlowRow(
                modifier = modifier.padding(contentPadding),
                horizontalArrangement = Arrangement.spacedBy(8.dp),
                verticalArrangement = Arrangement.spacedBy(8.dp),
            ) {
                content()
            }
        }
    }
}

@Composable
fun Chip(
    text: String,
    value: String,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    icon: ImageVector? = null,
    onRemove: (() -> Unit)? = null,
    removeLabel: String = "Remove $text",
) {
    val group = LocalChipGroupState.current
    val selected = group?.isSelected(value) ?: false
    ChipSurface(
        text = text,
        selected = selected,
        onClick = { group?.toggle(value) },
        multiple = group?.multiple ?: true,
        modifier = modifier,
        size = group?.size ?: ChipSize.Default,
        enabled = enabled && (group?.enabled ?: true),
        icon = icon,
        onRemove = onRemove,
        removeLabel = removeLabel,
    )
}

@Composable
fun Chip(
    text: String,
    selected: Boolean,
    onSelectedChange: (Boolean) -> Unit,
    modifier: Modifier = Modifier,
    size: ChipSize = LocalChipGroupState.current?.size ?: ChipSize.Default,
    enabled: Boolean = true,
    icon: ImageVector? = null,
    onRemove: (() -> Unit)? = null,
    removeLabel: String = "Remove $text",
) {
    ChipSurface(
        text = text,
        selected = selected,
        onClick = { onSelectedChange(!selected) },
        multiple = true,
        modifier = modifier,
        size = size,
        enabled = enabled,
        icon = icon,
        onRemove = onRemove,
        removeLabel = removeLabel,
    )
}

private fun chipBackground(colors: Colors, selected: Boolean, enabled: Boolean, pressed: Boolean): Color = when {
    !enabled -> if (selected) colors.controlSelected.copy(alpha = 0.4f) else colors.controlDisabled
    selected -> colors.controlSelected
    pressed -> colors.controlPressed
    else -> colors.control
}

private fun chipForeground(colors: Colors, selected: Boolean, enabled: Boolean): Color = when {
    selected && enabled -> colors.onControlSelected
    selected -> colors.onControlSelected.copy(alpha = 0.7f)
    !enabled -> colors.labelQuaternary
    else -> colors.label
}

@Composable
private fun ChipSurface(
    text: String,
    selected: Boolean,
    onClick: () -> Unit,
    multiple: Boolean,
    modifier: Modifier,
    size: ChipSize,
    enabled: Boolean,
    icon: ImageVector?,
    onRemove: (() -> Unit)?,
    removeLabel: String,
) {
    val colors = EsuissTheme.colors
    val interaction = remember { MutableInteractionSource() }
    val pressed by interaction.collectIsPressedAsState()
    val haptics = rememberHaptics()
    val select = {
        if (multiple) haptics.toggle(!selected) else haptics.selection()
        onClick()
    }
    val scale by animateFloatAsState(if (pressed && enabled) 0.96f else 1f, tween(150), label = "chip")
    val foreground = chipForeground(colors, selected, enabled)
    val semantics = if (multiple) {
        Modifier.toggleable(
            value = selected,
            interactionSource = interaction,
            indication = null,
            enabled = enabled,
            role = Role.Checkbox,
            onValueChange = { select() },
        )
    } else {
        Modifier.selectable(
            selected = selected,
            interactionSource = interaction,
            indication = null,
            enabled = enabled,
            role = Role.RadioButton,
            onClick = select,
        )
    }
    Row(
        modifier = modifier
            .graphicsLayer {
                scaleX = scale
                scaleY = scale
            }
            .height(size.height)
            .clip(CircleShape)
            .background(chipBackground(colors, selected, enabled, pressed), CircleShape)
            .then(semantics)
            .padding(start = if (icon != null) size.horizontalPadding - 4.dp else size.horizontalPadding)
            .padding(end = if (onRemove != null) 4.dp else size.horizontalPadding),
        horizontalArrangement = Arrangement.spacedBy(6.dp),
        verticalAlignment = Alignment.CenterVertically,
    ) {
        CompositionLocalProvider(
            LocalContentColor provides foreground,
            LocalIconSize provides size.iconSize,
        ) {
            if (icon != null) Icon(icon, contentDescription = null, size = size.iconSize, tint = foreground)
            BasicText(
                text,
                style = size.textStyle.copy(color = foreground, fontWeight = FontWeight.Medium),
                maxLines = 1,
            )
            if (onRemove != null) {
                Box(
                    modifier = Modifier
                        .size(size.height - 8.dp)
                        .clip(CircleShape)
                        .clickable(
                            interactionSource = remember { MutableInteractionSource() },
                            indication = null,
                            enabled = enabled,
                            role = Role.Button,
                            onClick = onRemove,
                        )
                        .semantics { contentDescription = removeLabel },
                    contentAlignment = Alignment.Center,
                ) {
                    Icon(
                        PhosphorIcons.Bold.X,
                        contentDescription = null,
                        size = size.iconSize - 4.dp,
                        tint = foreground.copy(alpha = foreground.alpha * 0.7f),
                    )
                }
            }
        }
    }
}
```

```kt title="kotlin/components/Content.kt"
package com.esuiss.ui.components

import androidx.compose.runtime.compositionLocalOf
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.dp

val LocalContentStyle = compositionLocalOf { TextStyle.Default }

val LocalContentColor = compositionLocalOf { Color.Unspecified }

val LocalIconSize = compositionLocalOf { 20.dp }
```

```kt title="kotlin/components/Field.kt"
package com.esuiss.ui.components

import androidx.compose.foundation.background
import androidx.compose.foundation.gestures.Orientation
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.ColumnScope
import androidx.compose.foundation.layout.LayoutScopeMarker
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.RowScope
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.heightIn
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.foundation.text.BasicText
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.Immutable
import androidx.compose.runtime.remember
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.layout.layout
import androidx.compose.ui.platform.LocalConfiguration
import androidx.compose.ui.semantics.LiveRegionMode
import androidx.compose.ui.semantics.heading
import androidx.compose.ui.semantics.liveRegion
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Radius
import com.esuiss.ui.theme.Typography

enum class FieldOrientation { Vertical, Horizontal, Responsive }

enum class FieldGroupVariant { Default, Inset }

enum class FieldLegendVariant { Legend, Label }

@Immutable
internal class FieldState(val enabled: Boolean, val invalid: Boolean)

internal val LocalFieldState = staticCompositionLocalOf { FieldState(enabled = true, invalid = false) }

private val LocalFieldSetInset = staticCompositionLocalOf { false }

private val LocalFieldGroupVariant = staticCompositionLocalOf<FieldGroupVariant?> { null }

private val LocalFieldInset = staticCompositionLocalOf { false }

@LayoutScopeMarker
@Immutable
interface FieldScope {
    fun Modifier.weight(weight: Float): Modifier
}

private class RowFieldScope(private val scope: RowScope) : FieldScope {
    override fun Modifier.weight(weight: Float): Modifier = with(scope) { this@weight.weight(weight, true) }
}

private object ColumnFieldScope : FieldScope {
    override fun Modifier.weight(weight: Float): Modifier = this
}

@Composable
fun FieldSet(
    modifier: Modifier = Modifier,
    variant: FieldGroupVariant = FieldGroupVariant.Default,
    enabled: Boolean = true,
    content: @Composable ColumnScope.() -> Unit,
) {
    val inset = variant == FieldGroupVariant.Inset
    CompositionLocalProvider(
        LocalFieldSetInset provides inset,
        LocalFieldState provides FieldState(enabled, LocalFieldState.current.invalid),
    ) {
        Column(
            modifier = modifier.fillMaxWidth(),
            verticalArrangement = Arrangement.spacedBy(if (inset) 8.dp else 24.dp),
            content = content,
        )
    }
}

@Composable
fun FieldLegend(
    text: String,
    modifier: Modifier = Modifier,
    variant: FieldLegendVariant = FieldLegendVariant.Legend,
) {
    val colors = EsuissTheme.colors
    val inset = LocalFieldSetInset.current
    val enabled = LocalFieldState.current.enabled
    val style = if (inset) {
        Typography.xs.copy(color = if (enabled) colors.labelSecondary else colors.labelQuaternary)
    } else {
        Typography.base.copy(color = if (enabled) colors.label else colors.labelQuaternary, fontWeight = FontWeight.SemiBold)
    }
    BasicText(
        text = if (inset) text.uppercase() else text,
        modifier = modifier
            .then(if (variant == FieldLegendVariant.Legend) Modifier.semantics { heading() } else Modifier)
            .padding(start = if (inset) 16.dp else 0.dp, bottom = if (inset) 0.dp else 12.dp),
        style = style,
    )
}

@Composable
fun FieldGroup(
    modifier: Modifier = Modifier,
    variant: FieldGroupVariant = FieldGroupVariant.Default,
    content: @Composable () -> Unit,
) {
    val colors = EsuissTheme.colors
    CompositionLocalProvider(
        LocalFieldSetInset provides false,
        LocalFieldGroupVariant provides variant,
    ) {
        if (variant == FieldGroupVariant.Inset) {
            FormDividedStack(
                orientation = Orientation.Vertical,
                dividerColor = colors.separator,
                modifier = modifier
                    .fillMaxWidth()
                    .clip(RoundedCornerShape(Radius.xl2))
                    .background(colors.surfaceSecondary),
                dividerInsetStart = 16.dp,
                content = content,
            )
        } else {
            Column(
                modifier = modifier.fillMaxWidth(),
                verticalArrangement = Arrangement.spacedBy(28.dp),
            ) {
                content()
            }
        }
    }
}

@Composable
fun Field(
    modifier: Modifier = Modifier,
    orientation: FieldOrientation = FieldOrientation.Vertical,
    enabled: Boolean = LocalFieldState.current.enabled,
    invalid: Boolean = false,
    content: @Composable FieldScope.() -> Unit,
) {
    val inset = LocalFieldGroupVariant.current == FieldGroupVariant.Inset
    val horizontal = when (orientation) {
        FieldOrientation.Vertical -> false
        FieldOrientation.Horizontal -> true
        FieldOrientation.Responsive -> LocalConfiguration.current.screenWidthDp >= 768
    }
    val sizing = modifier
        .fillMaxWidth()
        .then(if (inset) Modifier.heightIn(min = 44.dp).padding(horizontal = 16.dp, vertical = 6.dp) else Modifier)
    CompositionLocalProvider(
        LocalFieldGroupVariant provides null,
        LocalFieldInset provides inset,
        LocalFieldState provides FieldState(enabled, invalid),
    ) {
        if (horizontal) {
            Row(
                modifier = sizing,
                horizontalArrangement = Arrangement.spacedBy(12.dp),
                verticalAlignment = Alignment.CenterVertically,
            ) {
                val scope = remember(this) { RowFieldScope(this) }
                scope.content()
            }
        } else {
            Column(
                modifier = sizing,
                verticalArrangement = Arrangement.spacedBy(12.dp, Alignment.CenterVertically),
            ) {
                ColumnFieldScope.content()
            }
        }
    }
}

@Composable
fun FieldScope.FieldContent(
    modifier: Modifier = Modifier,
    content: @Composable ColumnScope.() -> Unit,
) {
    Column(
        modifier = modifier.weight(1f),
        verticalArrangement = Arrangement.spacedBy(4.dp),
        content = content,
    )
}

@Composable
fun FieldLabel(text: String, modifier: Modifier = Modifier) {
    val colors = EsuissTheme.colors
    val enabled = LocalFieldState.current.enabled
    BasicText(
        text = text,
        modifier = modifier,
        style = Typography.base.copy(
            color = if (enabled) colors.label else colors.labelQuaternary,
            fontWeight = if (LocalFieldInset.current) FontWeight.Normal else FontWeight.SemiBold,
        ),
    )
}

@Composable
fun FieldTitle(text: String, modifier: Modifier = Modifier) {
    val colors = EsuissTheme.colors
    val enabled = LocalFieldState.current.enabled
    BasicText(
        text = text,
        modifier = modifier,
        style = Typography.base.copy(
            color = if (enabled) colors.label else colors.labelQuaternary,
            fontWeight = FontWeight.SemiBold,
        ),
    )
}

@Composable
fun FieldDescription(text: String, modifier: Modifier = Modifier) {
    val colors = EsuissTheme.colors
    val inset = LocalFieldSetInset.current
    BasicText(
        text = text,
        modifier = modifier.padding(start = if (inset) 16.dp else 0.dp),
        style = (if (inset) Typography.xs else Typography.sm).copy(color = colors.labelSecondary),
    )
}

@Composable
fun FieldSeparator(
    modifier: Modifier = Modifier,
    text: String? = null,
) {
    val colors = EsuissTheme.colors
    Box(
        modifier = modifier
            .fillMaxWidth()
            .layout { measurable, constraints ->
                val placeable = measurable.measure(constraints)
                val overlap = 8.dp.roundToPx()
                val height = (placeable.height - overlap * 2).coerceAtLeast(0)
                layout(placeable.width, height) { placeable.place(0, -overlap) }
            }
            .heightIn(min = 20.dp),
        contentAlignment = Alignment.Center,
    ) {
        Separator()
        if (text != null) {
            BasicText(
                text = text,
                modifier = Modifier.background(colors.surface).padding(horizontal = 8.dp),
                style = Typography.sm.copy(color = colors.labelSecondary),
            )
        }
    }
}

@Composable
fun FieldError(text: String?, modifier: Modifier = Modifier) {
    if (text.isNullOrEmpty()) return
    BasicText(
        text = text,
        modifier = modifier.semantics { liveRegion = LiveRegionMode.Polite },
        style = Typography.sm.copy(color = EsuissTheme.colors.danger),
    )
}

@Composable
fun FieldError(errors: List<String?>, modifier: Modifier = Modifier) {
    val messages = errors.filterNotNull().filter { it.isNotEmpty() }.distinct()
    val text = when (messages.size) {
        0 -> null
        1 -> messages[0]
        else -> messages.joinToString("\n") { "• $it" }
    }
    FieldError(text, modifier)
}
```

```kt title="kotlin/components/FormSupport.kt"
package com.esuiss.ui.components

import android.provider.Settings
import androidx.compose.animation.core.CubicBezierEasing
import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.gestures.Orientation
import androidx.compose.foundation.text.selection.TextSelectionColors
import androidx.compose.runtime.Composable
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.draw.drawWithContent
import androidx.compose.ui.geometry.Offset
import androidx.compose.ui.geometry.Size
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.Shape
import androidx.compose.ui.layout.Layout
import androidx.compose.ui.layout.layout
import androidx.compose.ui.platform.LocalContext
import androidx.compose.ui.unit.Constraints
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.LayoutDirection
import androidx.compose.ui.unit.constrainHeight
import androidx.compose.ui.unit.constrainWidth
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.Colors
import com.esuiss.ui.theme.Shadow

internal val FormShadowXs = Shadow(0.dp, 1.dp, 2.dp, Color.Black.copy(alpha = 0.05f))

internal val FormShadowSm = Shadow(0.dp, 1.dp, 3.dp, Color.Black.copy(alpha = 0.1f))

internal val FormEasing = CubicBezierEasing(0.32f, 0.72f, 0f, 1f)

internal fun Modifier.formTouchTarget(): Modifier = layout { measurable, constraints ->
    val minimum = 48.dp.roundToPx()
    val placeable = measurable.measure(constraints)
    val width = constraints.constrainWidth(maxOf(placeable.width, minimum))
    val height = constraints.constrainHeight(maxOf(placeable.height, minimum))
    layout(width, height) {
        placeable.place((width - placeable.width) / 2, (height - placeable.height) / 2)
    }
}

@Composable
internal fun formReducedMotion(): Boolean {
    val context = LocalContext.current
    return remember(context) {
        Settings.Global.getFloat(context.contentResolver, Settings.Global.ANIMATOR_DURATION_SCALE, 1f) == 0f
    }
}

internal fun formSelectionColors(colors: Colors) = TextSelectionColors(
    handleColor = colors.accent,
    backgroundColor = colors.accent.copy(alpha = 0.3f),
)

internal fun Modifier.formInputSurface(
    colors: Colors,
    shape: Shape,
    focused: Boolean,
    invalid: Boolean,
    enabled: Boolean,
): Modifier {
    val background = when {
        !enabled -> colors.controlDisabled
        invalid -> colors.danger.copy(alpha = if (colors.isDark) 0.1f else 0.05f)
        else -> colors.control
    }
    val border = when {
        invalid -> colors.danger
        focused -> colors.focus
        else -> Color.Transparent
    }
    return clip(shape).background(background, shape).border(1.dp, border, shape)
}

@Composable
internal fun FormDividedStack(
    orientation: Orientation,
    dividerColor: Color,
    modifier: Modifier = Modifier,
    dividerInsetStart: Dp = 0.dp,
    content: @Composable () -> Unit,
) {
    val boundaries = remember { mutableStateOf(IntArray(0)) }
    val vertical = orientation == Orientation.Vertical
    Layout(
        content = content,
        modifier = modifier.drawWithContent {
            drawContent()
            val stroke = 1.dp.toPx()
            val inset = dividerInsetStart.toPx()
            boundaries.value.forEach { position ->
                if (vertical) {
                    val start = if (layoutDirection == LayoutDirection.Rtl) 0f else inset
                    drawRect(dividerColor, Offset(start, position.toFloat()), Size(size.width - inset, stroke))
                } else {
                    val x = if (layoutDirection == LayoutDirection.Rtl) size.width - position - stroke else position.toFloat()
                    drawRect(dividerColor, Offset(x, 0f), Size(stroke, size.height))
                }
            }
        },
    ) { measurables, constraints ->
        if (vertical) {
            val width = if (constraints.hasFixedWidth) {
                constraints.maxWidth
            } else {
                constraints.constrainWidth(measurables.maxOfOrNull { it.maxIntrinsicWidth(Constraints.Infinity) } ?: 0)
            }
            val placeables = measurables.map {
                it.measure(Constraints(minWidth = width, maxWidth = width))
            }
            val offsets = IntArray(placeables.size)
            var y = 0
            placeables.forEachIndexed { index, placeable ->
                offsets[index] = y
                y += placeable.height
            }
            val next = offsets.drop(1).toIntArray()
            if (!next.contentEquals(boundaries.value)) boundaries.value = next
            layout(width, constraints.constrainHeight(y)) {
                placeables.forEachIndexed { index, placeable -> placeable.placeRelative(0, offsets[index]) }
            }
        } else {
            val height = if (constraints.hasFixedHeight) {
                constraints.maxHeight
            } else {
                constraints.constrainHeight(measurables.maxOfOrNull { it.maxIntrinsicHeight(Constraints.Infinity) } ?: 0)
            }
            val placeables = measurables.map {
                it.measure(Constraints(minHeight = height, maxHeight = height))
            }
            val offsets = IntArray(placeables.size)
            var x = 0
            placeables.forEachIndexed { index, placeable ->
                offsets[index] = x
                x += placeable.width
            }
            val next = offsets.drop(1).toIntArray()
            if (!next.contentEquals(boundaries.value)) boundaries.value = next
            layout(constraints.constrainWidth(x), height) {
                placeables.forEachIndexed { index, placeable -> placeable.placeRelative(offsets[index], 0) }
            }
        }
    }
}
```

```kt title="kotlin/components/Haptics.kt"
package com.esuiss.ui.components

import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.remember
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.hapticfeedback.HapticFeedback
import androidx.compose.ui.hapticfeedback.HapticFeedbackType
import androidx.compose.ui.platform.LocalHapticFeedback

val LocalHapticsEnabled = staticCompositionLocalOf { true }

@Composable
fun ProvideHaptics(enabled: Boolean, content: @Composable () -> Unit) {
    CompositionLocalProvider(LocalHapticsEnabled provides enabled, content = content)
}

internal class Haptics(private val feedback: HapticFeedback, private val enabled: Boolean) {
    fun perform(type: HapticFeedbackType) {
        if (enabled) feedback.performHapticFeedback(type)
    }

    fun toggle(on: Boolean) = perform(if (on) HapticFeedbackType.ToggleOn else HapticFeedbackType.ToggleOff)

    fun selection() = perform(HapticFeedbackType.SegmentTick)
}

@Composable
internal fun rememberHaptics(): Haptics {
    val feedback = LocalHapticFeedback.current
    val enabled = LocalHapticsEnabled.current
    return remember(feedback, enabled) { Haptics(feedback, enabled) }
}
```

```kt title="kotlin/components/Icon.kt"
package com.esuiss.ui.components

import androidx.compose.foundation.Image
import androidx.compose.foundation.layout.size
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.ColorFilter
import androidx.compose.ui.graphics.takeOrElse
import androidx.compose.ui.graphics.vector.ImageVector
import androidx.compose.ui.unit.Dp
import com.esuiss.ui.theme.EsuissTheme

@Composable
fun Icon(
    imageVector: ImageVector,
    contentDescription: String?,
    modifier: Modifier = Modifier,
    size: Dp = LocalIconSize.current,
    tint: Color = LocalContentColor.current.takeOrElse { EsuissTheme.colors.label },
) {
    Image(
        imageVector = imageVector,
        contentDescription = contentDescription,
        modifier = modifier.size(size),
        colorFilter = ColorFilter.tint(tint),
    )
}
```

```kt title="kotlin/components/Label.kt"
package com.esuiss.ui.components

import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.RowScope
import androidx.compose.foundation.text.BasicText
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography

@Composable
fun Label(
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    content: @Composable RowScope.() -> Unit,
) {
    val colors = EsuissTheme.colors
    val color = if (enabled) colors.label else colors.labelQuaternary
    Row(
        modifier = modifier,
        horizontalArrangement = Arrangement.spacedBy(8.dp),
        verticalAlignment = Alignment.CenterVertically,
    ) {
        CompositionLocalProvider(
            LocalContentStyle provides Typography.base.copy(color = color, fontWeight = FontWeight.SemiBold),
            LocalContentColor provides color,
        ) {
            content()
        }
    }
}

@Composable
fun Label(
    text: String,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
) {
    Label(modifier, enabled) {
        BasicText(text, style = LocalContentStyle.current)
    }
}
```

```kt title="kotlin/components/Screen.kt"
package com.esuiss.ui.components

import android.app.Activity
import android.content.Context
import android.content.ContextWrapper
import android.os.Build
import android.view.View
import android.view.Window
import android.view.WindowInsetsController
import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.BoxScope
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.ExperimentalLayoutApi
import androidx.compose.foundation.layout.ColumnScope
import androidx.compose.foundation.layout.PaddingValues
import androidx.compose.foundation.layout.WindowInsets
import androidx.compose.foundation.layout.WindowInsetsSides
import androidx.compose.foundation.layout.displayCutout
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.only
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.statusBarsIgnoringVisibility
import androidx.compose.foundation.layout.systemBars
import androidx.compose.foundation.layout.union
import androidx.compose.foundation.layout.windowInsetsPadding
import androidx.compose.foundation.rememberScrollState
import androidx.compose.foundation.verticalScroll
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.SideEffect
import androidx.compose.runtime.Stable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableIntStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.Modifier
import androidx.compose.ui.platform.LocalView
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography

@Stable
internal class KeyboardAccessoryInset {
    var height by mutableIntStateOf(0)
}

internal val LocalKeyboardAccessory = staticCompositionLocalOf<KeyboardAccessoryInset?> { null }

enum class ScreenEdge { Top, Bottom, Left, Right }

enum class ScreenVariant { Default, Secondary }

private val AllScreenEdges = setOf(ScreenEdge.Top, ScreenEdge.Bottom, ScreenEdge.Left, ScreenEdge.Right)

private fun Set<ScreenEdge>.sides(): WindowInsetsSides? = map {
    when (it) {
        ScreenEdge.Top -> WindowInsetsSides.Top
        ScreenEdge.Bottom -> WindowInsetsSides.Bottom
        ScreenEdge.Left -> WindowInsetsSides.Left
        ScreenEdge.Right -> WindowInsetsSides.Right
    }
}.reduceOrNull { sides, side -> sides + side }

internal tailrec fun Context.findActivity(): Activity? = when (this) {
    is Activity -> this
    is ContextWrapper -> baseContext.findActivity()
    else -> null
}

@Suppress("DEPRECATION")
private fun Window.applyLightBars(light: Boolean) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
        val mask = WindowInsetsController.APPEARANCE_LIGHT_STATUS_BARS or WindowInsetsController.APPEARANCE_LIGHT_NAVIGATION_BARS
        insetsController?.setSystemBarsAppearance(if (light) mask else 0, mask)
        return
    }
    var flags = decorView.systemUiVisibility
    flags = if (light) flags or View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR else flags and View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR.inv()
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        flags = if (light) flags or View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR else flags and View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR.inv()
    }
    if (decorView.systemUiVisibility != flags) decorView.systemUiVisibility = flags
}

@OptIn(ExperimentalLayoutApi::class)
@Composable
fun Screen(
    modifier: Modifier = Modifier,
    edges: Set<ScreenEdge> = AllScreenEdges,
    variant: ScreenVariant = ScreenVariant.Default,
    content: @Composable BoxScope.() -> Unit,
) {
    val colors = EsuissTheme.colors
    val view = LocalView.current
    val light = !colors.isDark
    SideEffect {
        if (!view.isInEditMode) view.context.findActivity()?.window?.applyLightBars(light)
    }
    val sides = edges.sides()
    val accessory = remember { KeyboardAccessoryInset() }
    val fill = when (variant) {
        ScreenVariant.Default -> colors.surface
        ScreenVariant.Secondary -> colors.surfaceSecondary
    }
    Box(
        modifier = modifier
            .fillMaxSize()
            .background(fill)
            .then(
                if (sides != null) {
                    Modifier.windowInsetsPadding(WindowInsets.systemBars.union(WindowInsets.displayCutout).union(WindowInsets.statusBarsIgnoringVisibility).only(sides))
                } else {
                    Modifier
                },
            ),
    ) {
        CompositionLocalProvider(
            LocalKeyboardAccessory provides accessory,
            LocalContentStyle provides Typography.base.copy(color = colors.label),
            LocalContentColor provides colors.label,
        ) {
            content()
        }
    }
}

@Composable
fun ScreenContent(
    modifier: Modifier = Modifier,
    scrollable: Boolean = false,
    contentPadding: PaddingValues = PaddingValues(16.dp),
    verticalArrangement: Arrangement.Vertical = Arrangement.spacedBy(16.dp),
    content: @Composable ColumnScope.() -> Unit,
) {
    Column(
        modifier = modifier
            .fillMaxWidth()
            .then(if (scrollable) Modifier.verticalScroll(rememberScrollState()) else Modifier)
            .padding(contentPadding),
        verticalArrangement = verticalArrangement,
        content = content,
    )
}
```

```kt title="kotlin/components/Separator.kt"
package com.esuiss.ui.components

import androidx.compose.foundation.background
import androidx.compose.foundation.gestures.Orientation
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxHeight
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.width
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.EsuissTheme

@Composable
fun Separator(
    modifier: Modifier = Modifier,
    orientation: Orientation = Orientation.Horizontal,
) {
    val sizing = if (orientation == Orientation.Horizontal) {
        Modifier.fillMaxWidth().height(1.dp)
    } else {
        Modifier.fillMaxHeight().width(1.dp)
    }
    Box(modifier.then(sizing).background(EsuissTheme.colors.separator))
}
```

4. Update the `com.esuiss.ui` package names to match your project.

## Usage

```tsx
import { NavCategories } from "@/components/blocks/nav-categories"
```

```tsx
<NavCategories />
```

Replace `CATEGORIES` with your categories and images. Wire `onSelectCategory`, `onAskSpecialist` and `onFindStore` to your navigation. The photos are Unsplash placeholders.