# Bag Review

A shopping bag screen with item rows, quantity steppers, a subtotal and checkout buttons.

Bag Review 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/bag-review

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

```tsx title="uniwind/components/blocks/bag-review.tsx"
import * as React from "react"
import { Image, Pressable, ScrollView, View } from "react-native"
import { FadeIn, FadeInDown, ReduceMotion } from "react-native-reanimated"
import {
  Stepper,
  StepperDecrement,
  StepperGroup,
  StepperIncrement,
  StepperInput,
  StepperSeparator,
} from "@/components/interactions/stepper"
import { AnimatedView } from "@/components/ui/animated-view"
import { BottomBar, BottomBarContent } from "@/components/ui/bottom-bar"
import { Button } from "@/components/ui/button"
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 INITIAL_ITEMS = [
  {
    name: "Phone Pro",
    variant: "256 GB · Cosmic Orange",
    price: 1099,
    image: photo("1714972384975-fbd4f19b1bb3"),
    quantity: 1,
  },
  {
    name: "Pods Studio",
    variant: "Midnight",
    price: 549,
    image: photo("1599669454699-248893623440"),
    quantity: 1,
  },
  {
    name: "Phone Pro Clear Case",
    variant: "With MagCharge",
    price: 49,
    image: photo("1703676311066-34caf2cbee33"),
    quantity: 2,
  },
]

const THOUSANDS = /\B(?=(\d{3})+(?!\d))/g

function money(value: number, digits = 2) {
  try {
    return new Intl.NumberFormat("en-US", {
      style: "currency",
      currency: "USD",
      minimumFractionDigits: digits,
      maximumFractionDigits: digits,
    }).format(value)
  } catch {
    const [whole = "0", fraction] = value.toFixed(digits).split(".")
    return `$${whole.replace(THOUSANDS, ",")}${fraction ? `.${fraction}` : ""}`
  }
}

function BagReview({
  onCheckout,
  onShowDetails,
  onContinueShopping,
  onQuantityChange,
  onRemove,
}: {
  onCheckout?: (method: "suiss-pay" | "default") => void
  onShowDetails?: (name: string) => void
  onContinueShopping?: () => void
  onQuantityChange?: (name: string, quantity: number) => void
  onRemove?: (name: string) => void
}) {
  const [items, setItems] = React.useState(INITIAL_ITEMS)
  const bag = items.filter((item) => item.quantity > 0)
  const subtotal = bag.reduce(
    (sum, item) => sum + item.price * item.quantity,
    0
  )

  const setQuantity = (name: string, quantity: number) =>
    setItems((current) =>
      current.map((item) => (item.name === name ? { ...item, quantity } : item))
    )

  return (
    <Screen edges={["top", "right", "left"]}>
      <ScrollView contentContainerClassName="grow px-5 pt-8 pb-8">
        <Text
          role="heading"
          accessibilityLiveRegion="polite"
          className="text-center text-3xl font-semibold"
        >
          {bag.length
            ? `Your bag total is ${money(subtotal)}.`
            : "Your bag is empty."}
        </Text>
        <Text className="mt-2 mb-5 text-center text-base text-label-secondary">
          Free delivery and free returns on every order.
        </Text>
        {bag.length === 0 ? (
          <AnimatedView
            entering={FadeIn.duration(400).reduceMotion(ReduceMotion.System)}
            className="items-center"
          >
            <Button
              size="lg"
              onPress={() => {
                onContinueShopping?.()
                setItems(INITIAL_ITEMS)
              }}
            >
              <Text>Continue Shopping</Text>
            </Button>
          </AnimatedView>
        ) : null}
        {bag.map((item) => (
          <AnimatedView
            key={item.name}
            entering={FadeInDown.duration(700).reduceMotion(
              ReduceMotion.System
            )}
            className="flex-row gap-3 border-t border-separator py-4"
          >
            <Pressable
              role="link"
              accessibilityLabel={`Show details for ${item.name}`}
              onPress={() => onShowDetails?.(item.name)}
              className="active:opacity-60"
            >
              <Image
                source={{ uri: item.image }}
                resizeMode="cover"
                accessibilityIgnoresInvertColors
                className="size-16 rounded-lg bg-control"
              />
            </Pressable>
            <View className="min-w-0 flex-1">
              <View className="gap-0.5">
                <View className="flex-row items-start justify-between gap-3">
                  <Pressable
                    role="link"
                    accessibilityLabel={`Show details for ${item.name}`}
                    onPress={() => onShowDetails?.(item.name)}
                    className="min-w-0 shrink active:opacity-60"
                  >
                    <Text numberOfLines={1} className="text-base font-semibold">
                      {item.name}
                    </Text>
                  </Pressable>
                  <Text className="text-base font-semibold tabular-nums">
                    {money(item.price * item.quantity)}
                  </Text>
                </View>
                <Text
                  numberOfLines={1}
                  className="text-sm text-label-secondary"
                >
                  {item.variant}
                </Text>
              </View>
              <View className="mt-2.5 flex-row items-center justify-between">
                <Stepper
                  value={item.quantity}
                  onValueChange={(value) => {
                    onQuantityChange?.(item.name, value)
                    setQuantity(item.name, value)
                  }}
                  min={1}
                  max={10}
                  className="gap-2"
                >
                  <StepperInput
                    accessibilityLabel={`${item.name} quantity`}
                    className="w-8 text-center"
                  />
                  <StepperGroup>
                    <StepperDecrement />
                    <StepperSeparator />
                    <StepperIncrement />
                  </StepperGroup>
                </Stepper>
                <Button
                  variant="link"
                  size="sm"
                  accessibilityLabel={`Remove ${item.name}`}
                  onPress={() => {
                    onRemove?.(item.name)
                    setQuantity(item.name, 0)
                  }}
                  className="h-auto px-0"
                >
                  <Text className="text-sm text-link">Remove</Text>
                </Button>
              </View>
            </View>
          </AnimatedView>
        ))}
        {bag.length > 0 ? (
          <View className="gap-2.5 border-t border-separator pt-5">
            <View className="flex-row justify-between">
              <Text className="text-base">Subtotal</Text>
              <Text className="text-base tabular-nums">{money(subtotal)}</Text>
            </View>
            <View className="flex-row justify-between">
              <Text className="text-base">Shipping</Text>
              <Text className="text-base">FREE</Text>
            </View>
            <View className="flex-row justify-between border-t border-separator pt-3">
              <Text className="text-2xl font-semibold">Total</Text>
              <Text className="text-2xl font-semibold tabular-nums">
                {money(subtotal)}
              </Text>
            </View>
          </View>
        ) : null}
      </ScrollView>
      {bag.length > 0 ? (
        <BottomBar separator>
          <BottomBarContent>
            <Button
              size="lg"
              block
              onPress={() => onCheckout?.("suiss-pay")}
              className="bg-label active:bg-label/80"
            >
              <Text className="text-surface">
                Check Out with{" "}
                <Text className="font-bold text-surface">suiss</Text> Pay
              </Text>
            </Button>
            <Button size="lg" block onPress={() => onCheckout?.("default")}>
              <Text>Check Out</Text>
            </Button>
          </BottomBarContent>
        </BottomBar>
      ) : null}
    </Screen>
  )
}

export { BagReview }
```

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

public struct BagReview: View {
  public enum CheckoutMethod: CaseIterable, Sendable {
    case suissPay, `default`
  }

  struct Product: Identifiable, Equatable {
    let name: String
    let variant: String
    let price: Double
    let image: URL?
    var quantity: Int

    var id: String { name }
  }

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

  static var initialItems: [Product] {
    [
      Product(name: "Phone Pro", variant: "256 GB · Cosmic Orange", price: 1099, image: photo("1714972384975-fbd4f19b1bb3"), quantity: 1),
      Product(name: "Pods Studio", variant: "Midnight", price: 549, image: photo("1599669454699-248893623440"), quantity: 1),
      Product(name: "Phone Pro Clear Case", variant: "With MagCharge", price: 49, image: photo("1703676311066-34caf2cbee33"), quantity: 2),
    ]
  }

  private var onCheckout: ((CheckoutMethod) -> Void)?
  private var onShowDetails: ((String) -> Void)?
  private var onContinueShopping: (() -> Void)?
  private var onQuantityChange: ((String, Int) -> Void)?
  private var onRemove: ((String) -> Void)?
  @State private var items: [Product]
  @Environment(\.locale) private var locale
  @Environment(\.accessibilityReduceMotion) private var reduceMotion

  public init(
    onCheckout: ((_ method: CheckoutMethod) -> Void)? = nil,
    onShowDetails: ((_ name: String) -> Void)? = nil,
    onContinueShopping: (() -> Void)? = nil,
    onQuantityChange: ((_ name: String, _ quantity: Int) -> Void)? = nil,
    onRemove: ((_ name: String) -> Void)? = nil
  ) {
    self.init(items: Self.initialItems)
    self.onCheckout = onCheckout
    self.onShowDetails = onShowDetails
    self.onContinueShopping = onContinueShopping
    self.onQuantityChange = onQuantityChange
    self.onRemove = onRemove
  }

  init(items: [Product]) {
    _items = State(initialValue: items)
  }

  private var bag: [Product] {
    items.filter { $0.quantity > 0 }
  }

  private var subtotal: Double {
    bag.reduce(0) { $0 + $1.price * Double($1.quantity) }
  }

  private func money(_ value: Double) -> String {
    value.formatted(.currency(code: "USD").locale(locale))
  }

  public var body: some View {
    let bag = bag
    Screen {
      KeyboardScrollView {
        VStack(spacing: 0) {
          VStack(spacing: 8) {
            Group {
              if bag.isEmpty {
                Text("Your bag is empty.")
              } else {
                Text("Your bag total is \(money(subtotal)).")
              }
            }
            .scaledTextStyle(.xl2, weight: .semibold)
            .contentTransition(.numericText())
            .accessibilityAddTraits(.isHeader)
            Text("Free delivery and free returns on every order.")
              .scaledFont(.base)
              .foregroundStyle(Color.labelSecondary)
            if bag.isEmpty {
              Button("Continue Shopping") {
                onContinueShopping?()
                items = Self.initialItems
              }
              .buttonStyle(.variant(.default, size: .lg))
              .padding(.top, 12)
            }
          }
          .multilineTextAlignment(.center)
          .fixedSize(horizontal: false, vertical: true)
          .padding(.top, 32)
          .padding(.bottom, 20)
          ForEach(bag) { item in
            BagReviewRow(
              item: item,
              money: money,
              quantity: binding(item.name),
              onShowDetails: { onShowDetails?(item.name) },
              onRemove: {
                onRemove?(item.name)
                setQuantity(item.name, 0)
              }
            )
            .transition(.opacity.combined(with: .offset(y: 6)))
          }
          if !bag.isEmpty {
            VStack(spacing: 10) {
              BagReviewTotal(label: "Subtotal", value: Text(verbatim: money(subtotal)))
              BagReviewTotal(label: "Shipping", value: Text("FREE"))
              BagReviewTotal(label: "Total", value: Text(verbatim: money(subtotal)), large: true)
                .padding(.top, 12)
                .overlay(alignment: .top) {
                  Color.separator.frame(height: 1)
                }
            }
            .padding(.top, 20)
            .overlay(alignment: .top) {
              Color.separator.frame(height: 1)
            }
          }
        }
        .padding(.horizontal, 20)
        .padding(.bottom, 24)
      }
      if !bag.isEmpty {
        BottomBar {
          BottomBarContent {
            Button {
              onCheckout?(.suissPay)
            } label: {
              Text("Check Out with \(Text(verbatim: "suiss").bold()) Pay")
            }
            .buttonStyle(BagReviewPayStyle())
            Button("Check Out") {
              onCheckout?(.default)
            }
            .buttonStyle(.variant(.default, size: .lg, block: true))
          }
        }
        .transition(.move(edge: .bottom))
      }
    }
    .animation(reduceMotion ? nil : .timingCurve(0.32, 0.72, 0, 1, duration: 0.5), value: items)
  }

  private func binding(_ name: String) -> Binding<Int> {
    Binding(
      get: { items.first { $0.name == name }?.quantity ?? 0 },
      set: { value in
        onQuantityChange?(name, value)
        setQuantity(name, value)
      }
    )
  }

  private func setQuantity(_ name: String, _ quantity: Int) {
    guard let index = items.firstIndex(where: { $0.name == name }) else { return }
    items[index].quantity = quantity
  }
}

private struct BagReviewRow: View {
  let item: BagReview.Product
  let money: (Double) -> String
  @Binding var quantity: Int
  let onShowDetails: () -> Void
  let onRemove: () -> Void

  var body: some View {
    HStack(alignment: .top, spacing: 12) {
      Button(action: onShowDetails) {
        Color.control
          .overlay {
            AsyncImage(url: item.image) { phase in
              if let image = phase.image {
                image.resizable().scaledToFill()
              }
            }
          }
          .frame(width: 64, height: 64)
          .clipShape(RoundedRectangle(cornerRadius: Radius.lg, style: .continuous))
      }
      .buttonStyle(BagReviewPressStyle())
      .accessibilityLabel(Text("Show details for \(item.name)"))
      .accessibilityAddTraits(.isLink)
      VStack(alignment: .leading, spacing: 0) {
        VStack(alignment: .leading, spacing: 2) {
          HStack(alignment: .firstTextBaseline, spacing: 12) {
            Button(action: onShowDetails) {
              Text(verbatim: item.name)
                .scaledFont(.base, weight: .semibold)
                .lineLimit(1)
                .truncationMode(.tail)
            }
            .buttonStyle(BagReviewPressStyle())
            .accessibilityLabel(Text("Show details for \(item.name)"))
            .accessibilityAddTraits(.isLink)
            .frame(maxWidth: .infinity, alignment: .leading)
            Text(verbatim: money(item.price * Double(item.quantity)))
              .scaledFont(.base, weight: .semibold)
              .monospacedDigit()
              .contentTransition(.numericText())
              .fixedSize()
          }
          Text(verbatim: item.variant)
            .scaledFont(.sm)
            .foregroundStyle(Color.labelSecondary)
            .lineLimit(1)
        }
        HStack {
          ValueStepper(value: $quantity, in: 1...10) {
            StepperInput()
              .accessibilityLabel(Text("\(item.name) quantity"))
            StepperGroup {
              StepperDecrement()
              StepperSeparator()
              StepperIncrement()
            }
          }
          .frame(maxWidth: .infinity, alignment: .leading)
          Button("Remove", action: onRemove)
            .buttonStyle(BagReviewLinkStyle())
            .accessibilityLabel(Text("Remove \(item.name)"))
        }
        .padding(.top, 10)
      }
    }
    .padding(.vertical, 16)
    .overlay(alignment: .top) {
      Color.separator.frame(height: 1)
    }
  }
}

private struct BagReviewTotal: View {
  let label: LocalizedStringKey
  let value: Text
  var large = false

  var body: some View {
    HStack {
      Text(label)
        .frame(maxWidth: .infinity, alignment: .leading)
      value.monospacedDigit()
    }
    .scaledFont(large ? .xl2 : .base, weight: large ? .semibold : .regular)
    .accessibilityElement(children: .combine)
  }
}

private struct BagReviewLinkStyle: 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())
  }
}

private struct BagReviewPressStyle: ButtonStyle {
  func makeBody(configuration: Configuration) -> some View {
    configuration.label
      .opacity(configuration.isPressed ? 0.6 : 1)
      .contentShape(Rectangle())
  }
}

private struct BagReviewPayStyle: ButtonStyle {
  @Environment(\.accessibilityReduceMotion) private var reduceMotion

  func makeBody(configuration: Configuration) -> some View {
    configuration.label
      .scaledFont(.base, weight: .medium)
      .foregroundStyle(Color.surface)
      .frame(maxWidth: .infinity, minHeight: 44)
      .background(Color.label.opacity(configuration.isPressed ? 0.8 : 1), in: RoundedRectangle(cornerRadius: Radius.lg, style: .continuous))
      .scaleEffect(configuration.isPressed && !reduceMotion ? 0.98 : 1)
      .contentShape(Rectangle())
  }
}
```

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

import androidx.compose.animation.core.Animatable
import androidx.compose.animation.core.tween
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.Row
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.heightIn
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.rememberScrollState
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.foundation.text.BasicText
import androidx.compose.foundation.verticalScroll
import androidx.compose.runtime.Composable
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.getValue
import androidx.compose.runtime.key
import androidx.compose.runtime.mutableStateListOf
import androidx.compose.runtime.remember
import androidx.compose.ui.Alignment
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.clearAndSetSemantics
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.heading
import androidx.compose.ui.semantics.liveRegion
import androidx.compose.ui.semantics.role
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.style.TextAlign
import androidx.compose.ui.text.style.TextOverflow
import androidx.compose.ui.text.withStyle
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Light
import com.adamglin.phosphoricons.light.DeviceMobile
import com.adamglin.phosphoricons.light.DeviceMobileCamera
import com.adamglin.phosphoricons.light.Headphones
import com.esuiss.ui.components.BottomBar
import com.esuiss.ui.components.BottomBarContent
import com.esuiss.ui.components.Button
import com.esuiss.ui.components.ButtonSize
import com.esuiss.ui.components.Icon
import com.esuiss.ui.components.Screen
import com.esuiss.ui.interactions.Stepper
import com.esuiss.ui.interactions.StepperDecrement
import com.esuiss.ui.interactions.StepperGroup
import com.esuiss.ui.interactions.StepperIncrement
import com.esuiss.ui.interactions.StepperInput
import com.esuiss.ui.interactions.StepperSeparator
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Radius
import com.esuiss.ui.theme.Typography
import java.text.NumberFormat
import java.util.Currency
import java.util.Locale

private class ReviewItem(val name: String, val variant: String, val price: Double, val icon: ImageVector, val quantity: Int)

private val ReviewItems = listOf(
    ReviewItem("Phone Pro", "256 GB · Cosmic Orange", 1099.0, PhosphorIcons.Light.DeviceMobile, 1),
    ReviewItem("Pods Studio", "Midnight", 549.0, PhosphorIcons.Light.Headphones, 1),
    ReviewItem("Phone Pro Clear Case", "With MagCharge", 49.0, PhosphorIcons.Light.DeviceMobileCamera, 2),
)

private fun reviewMoney(value: Double): String =
    NumberFormat.getCurrencyInstance(Locale.US).apply { currency = Currency.getInstance("USD") }.format(value)

@Composable
fun BagReview(
    modifier: Modifier = Modifier,
    onCheckout: (method: String) -> Unit = {},
    onShowDetails: (item: String) -> Unit = {},
    onContinueShopping: () -> Unit = {},
    onQuantityChange: (item: String, quantity: Int) -> Unit = { _, _ -> },
    onRemove: (item: String) -> Unit = {},
) {
    val colors = EsuissTheme.colors
    val items = remember { mutableStateListOf<ReviewItem>().apply { addAll(ReviewItems) } }
    val bag = items.filter { it.quantity > 0 }
    val subtotal = bag.sumOf { it.price * it.quantity }

    fun setQuantity(name: String, quantity: Int) {
        val index = items.indexOfFirst { it.name == name }
        if (index < 0) return
        val item = items[index]
        if (item.quantity == quantity) return
        if (quantity == 0) onRemove(name) else onQuantityChange(name, quantity)
        items[index] = ReviewItem(item.name, item.variant, item.price, item.icon, quantity)
    }

    Screen(modifier) {
        Column(Modifier.fillMaxSize()) {
            Column(
                Modifier
                    .weight(1f)
                    .verticalScroll(rememberScrollState())
                    .padding(horizontal = 20.dp, vertical = 32.dp),
            ) {
                BasicText(
                    if (bag.isNotEmpty()) "Your bag total is ${reviewMoney(subtotal)}." else "Your bag is empty.",
                    modifier = Modifier
                        .fillMaxWidth()
                        .semantics {
                            heading()
                            liveRegion = LiveRegionMode.Polite
                        },
                    style = Typography.xl3.copy(color = colors.label, fontWeight = FontWeight.SemiBold, textAlign = TextAlign.Center),
                )
                BasicText(
                    "Free delivery and free returns on every order.",
                    modifier = Modifier
                        .fillMaxWidth()
                        .padding(top = 8.dp, bottom = 20.dp),
                    style = Typography.base.copy(color = colors.labelSecondary, textAlign = TextAlign.Center),
                )
                if (bag.isEmpty()) {
                    Button(
                        "Continue Shopping",
                        {
                            onContinueShopping()
                            items.clear()
                            items.addAll(ReviewItems)
                        },
                        modifier = Modifier.align(Alignment.CenterHorizontally),
                        size = ButtonSize.Lg,
                    )
                }
                bag.forEach { item ->
                    key(item.name) {
                        ReviewRow(
                            item = item,
                            onQuantity = { setQuantity(item.name, it) },
                            onShowDetails = { onShowDetails(item.name) },
                        )
                    }
                }
                if (bag.isNotEmpty()) {
                    Box(
                        Modifier
                            .fillMaxWidth()
                            .height(1.dp)
                            .background(colors.separator),
                    )
                    Column(
                        Modifier.padding(top = 20.dp),
                        verticalArrangement = Arrangement.spacedBy(10.dp),
                    ) {
                        ReviewTotalRow("Subtotal", reviewMoney(subtotal))
                        ReviewTotalRow("Shipping", "FREE")
                        Box(
                            Modifier
                                .fillMaxWidth()
                                .height(1.dp)
                                .background(colors.separator),
                        )
                        Row(Modifier.padding(top = 2.dp)) {
                            BasicText(
                                "Total",
                                modifier = Modifier.weight(1f),
                                style = Typography.xl2.copy(color = colors.label, fontWeight = FontWeight.SemiBold),
                            )
                            BasicText(
                                reviewMoney(subtotal),
                                style = Typography.xl2.copy(color = colors.label, fontWeight = FontWeight.SemiBold, fontFeatureSettings = "tnum"),
                            )
                        }
                    }
                }
            }
            if (bag.isNotEmpty()) {
                BottomBar(separator = true) {
                    BottomBarContent {
                        ReviewPayButton { onCheckout("SuissPay") }
                        Button("Check Out", { onCheckout("Default") }, size = ButtonSize.Lg, block = true)
                    }
                }
            }
        }
    }
}

@Composable
private fun ReviewRow(item: ReviewItem, onQuantity: (Int) -> Unit, onShowDetails: () -> Unit) {
    val colors = EsuissTheme.colors
    val appear = remember { Animatable(0f) }
    LaunchedEffect(Unit) { appear.animateTo(1f, tween(700)) }
    Column(
        Modifier.graphicsLayer {
            alpha = appear.value
            translationY = (1f - appear.value) * 6.dp.toPx()
        },
    ) {
        Box(
            Modifier
                .fillMaxWidth()
                .height(1.dp)
                .background(colors.separator),
        )
        Row(
            modifier = Modifier.padding(vertical = 16.dp),
            horizontalArrangement = Arrangement.spacedBy(12.dp),
        ) {
            Box(
                Modifier
                    .size(64.dp)
                    .reviewDetailsLink(item.name, onShowDetails)
                    .background(colors.control, RoundedCornerShape(Radius.lg)),
                contentAlignment = Alignment.Center,
            ) {
                Icon(item.icon, contentDescription = null, size = 36.dp, tint = colors.labelSecondary)
            }
            Column(Modifier.weight(1f)) {
                Column(verticalArrangement = Arrangement.spacedBy(2.dp)) {
                    Row(horizontalArrangement = Arrangement.spacedBy(12.dp)) {
                        Box(Modifier.weight(1f)) {
                            BasicText(
                                item.name,
                                modifier = Modifier.reviewDetailsLink(item.name, onShowDetails),
                                style = Typography.base.copy(color = colors.label, fontWeight = FontWeight.SemiBold),
                                maxLines = 1,
                                overflow = TextOverflow.Ellipsis,
                            )
                        }
                        BasicText(
                            reviewMoney(item.price * item.quantity),
                            style = Typography.base.copy(color = colors.label, fontWeight = FontWeight.SemiBold, fontFeatureSettings = "tnum"),
                        )
                    }
                    BasicText(
                        item.variant,
                        style = Typography.sm.copy(color = colors.labelSecondary),
                        maxLines = 1,
                        overflow = TextOverflow.Ellipsis,
                    )
                }
                Row(
                    Modifier
                        .fillMaxWidth()
                        .padding(top = 10.dp),
                    horizontalArrangement = Arrangement.SpaceBetween,
                    verticalAlignment = Alignment.CenterVertically,
                ) {
                    Stepper(
                        value = item.quantity.toDouble(),
                        onValueChange = { onQuantity(it.toInt()) },
                        min = 1.0,
                        max = 10.0,
                    ) {
                        StepperInput(contentDescription = "${item.name} quantity")
                        StepperGroup {
                            StepperDecrement()
                            StepperSeparator()
                            StepperIncrement()
                        }
                    }
                    ReviewLink("Remove", Modifier.semantics { contentDescription = "Remove ${item.name}" }) { onQuantity(0) }
                }
            }
        }
    }
}

@Composable
private fun Modifier.reviewDetailsLink(name: String, onClick: () -> Unit): Modifier {
    val interaction = remember { MutableInteractionSource() }
    val pressed by interaction.collectIsPressedAsState()
    return this
        .graphicsLayer { alpha = if (pressed) 0.6f else 1f }
        .clickable(interactionSource = interaction, indication = null, onClick = onClick)
        .clearAndSetSemantics {
            role = Role.Button
            contentDescription = "Show details for $name"
        }
}

@Composable
private fun ReviewTotalRow(label: String, value: String) {
    val colors = EsuissTheme.colors
    Row {
        BasicText(label, modifier = Modifier.weight(1f), style = Typography.base.copy(color = colors.label))
        BasicText(value, style = Typography.base.copy(color = colors.label, fontFeatureSettings = "tnum"))
    }
}

@Composable
private fun ReviewLink(text: String, modifier: Modifier = Modifier, 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),
    )
}

@Composable
private fun ReviewPayButton(onClick: () -> Unit) {
    val colors = EsuissTheme.colors
    val interaction = remember { MutableInteractionSource() }
    val pressed by interaction.collectIsPressedAsState()
    val shape = RoundedCornerShape(Radius.lg)
    Box(
        Modifier
            .fillMaxWidth()
            .heightIn(min = ButtonSize.Lg.height)
            .graphicsLayer {
                val scale = if (pressed) 0.98f else 1f
                scaleX = scale
                scaleY = scale
            }
            .background(colors.label.copy(alpha = if (pressed) 0.8f else 1f), shape)
            .clickable(interactionSource = interaction, indication = null, onClick = onClick)
            .semantics(mergeDescendants = true) { role = Role.Button },
        contentAlignment = Alignment.Center,
    ) {
        BasicText(
            buildAnnotatedString {
                append("Check Out with ")
                withStyle(SpanStyle(fontWeight = FontWeight.Bold)) { append("suiss") }
                append(" Pay")
            },
            style = Typography.base.copy(color = colors.surface, fontWeight = FontWeight.Medium),
        )
    }
}
```

Composes `Screen`, `Stepper` from the interactions, `Button`, `Text` and `BottomBar`. Each compact row shows a thumbnail, the product name with its line price, the variant, a quantity stepper and a Remove link; tapping the thumbnail or the name opens the product details. The heading and totals update as the bag changes, and removing every item shows an empty state with a Continue Shopping button.

## Installation

```bash title="Terminal"
npx @esuiss/uim@latest add bag-review
```

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

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

The CLI also adds what it builds on: [Bottom Bar](/docs/components/bottom-bar), [Button](/docs/components/button), [Screen](/docs/components/screen), [Stepper](/docs/interactions/stepper), [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: [Bottom Bar](/docs/components/bottom-bar), [Button](/docs/components/button), [Screen](/docs/components/screen), [Stepper](/docs/interactions/stepper), [Text](/docs/components/text).

3. Copy the source into `components/blocks/bag-review.tsx`:

```tsx title="uniwind/components/blocks/bag-review.tsx"
import * as React from "react"
import { Image, Pressable, ScrollView, View } from "react-native"
import { FadeIn, FadeInDown, ReduceMotion } from "react-native-reanimated"
import {
  Stepper,
  StepperDecrement,
  StepperGroup,
  StepperIncrement,
  StepperInput,
  StepperSeparator,
} from "@/components/interactions/stepper"
import { AnimatedView } from "@/components/ui/animated-view"
import { BottomBar, BottomBarContent } from "@/components/ui/bottom-bar"
import { Button } from "@/components/ui/button"
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 INITIAL_ITEMS = [
  {
    name: "Phone Pro",
    variant: "256 GB · Cosmic Orange",
    price: 1099,
    image: photo("1714972384975-fbd4f19b1bb3"),
    quantity: 1,
  },
  {
    name: "Pods Studio",
    variant: "Midnight",
    price: 549,
    image: photo("1599669454699-248893623440"),
    quantity: 1,
  },
  {
    name: "Phone Pro Clear Case",
    variant: "With MagCharge",
    price: 49,
    image: photo("1703676311066-34caf2cbee33"),
    quantity: 2,
  },
]

const THOUSANDS = /\B(?=(\d{3})+(?!\d))/g

function money(value: number, digits = 2) {
  try {
    return new Intl.NumberFormat("en-US", {
      style: "currency",
      currency: "USD",
      minimumFractionDigits: digits,
      maximumFractionDigits: digits,
    }).format(value)
  } catch {
    const [whole = "0", fraction] = value.toFixed(digits).split(".")
    return `$${whole.replace(THOUSANDS, ",")}${fraction ? `.${fraction}` : ""}`
  }
}

function BagReview({
  onCheckout,
  onShowDetails,
  onContinueShopping,
  onQuantityChange,
  onRemove,
}: {
  onCheckout?: (method: "suiss-pay" | "default") => void
  onShowDetails?: (name: string) => void
  onContinueShopping?: () => void
  onQuantityChange?: (name: string, quantity: number) => void
  onRemove?: (name: string) => void
}) {
  const [items, setItems] = React.useState(INITIAL_ITEMS)
  const bag = items.filter((item) => item.quantity > 0)
  const subtotal = bag.reduce(
    (sum, item) => sum + item.price * item.quantity,
    0
  )

  const setQuantity = (name: string, quantity: number) =>
    setItems((current) =>
      current.map((item) => (item.name === name ? { ...item, quantity } : item))
    )

  return (
    <Screen edges={["top", "right", "left"]}>
      <ScrollView contentContainerClassName="grow px-5 pt-8 pb-8">
        <Text
          role="heading"
          accessibilityLiveRegion="polite"
          className="text-center text-3xl font-semibold"
        >
          {bag.length
            ? `Your bag total is ${money(subtotal)}.`
            : "Your bag is empty."}
        </Text>
        <Text className="mt-2 mb-5 text-center text-base text-label-secondary">
          Free delivery and free returns on every order.
        </Text>
        {bag.length === 0 ? (
          <AnimatedView
            entering={FadeIn.duration(400).reduceMotion(ReduceMotion.System)}
            className="items-center"
          >
            <Button
              size="lg"
              onPress={() => {
                onContinueShopping?.()
                setItems(INITIAL_ITEMS)
              }}
            >
              <Text>Continue Shopping</Text>
            </Button>
          </AnimatedView>
        ) : null}
        {bag.map((item) => (
          <AnimatedView
            key={item.name}
            entering={FadeInDown.duration(700).reduceMotion(
              ReduceMotion.System
            )}
            className="flex-row gap-3 border-t border-separator py-4"
          >
            <Pressable
              role="link"
              accessibilityLabel={`Show details for ${item.name}`}
              onPress={() => onShowDetails?.(item.name)}
              className="active:opacity-60"
            >
              <Image
                source={{ uri: item.image }}
                resizeMode="cover"
                accessibilityIgnoresInvertColors
                className="size-16 rounded-lg bg-control"
              />
            </Pressable>
            <View className="min-w-0 flex-1">
              <View className="gap-0.5">
                <View className="flex-row items-start justify-between gap-3">
                  <Pressable
                    role="link"
                    accessibilityLabel={`Show details for ${item.name}`}
                    onPress={() => onShowDetails?.(item.name)}
                    className="min-w-0 shrink active:opacity-60"
                  >
                    <Text numberOfLines={1} className="text-base font-semibold">
                      {item.name}
                    </Text>
                  </Pressable>
                  <Text className="text-base font-semibold tabular-nums">
                    {money(item.price * item.quantity)}
                  </Text>
                </View>
                <Text
                  numberOfLines={1}
                  className="text-sm text-label-secondary"
                >
                  {item.variant}
                </Text>
              </View>
              <View className="mt-2.5 flex-row items-center justify-between">
                <Stepper
                  value={item.quantity}
                  onValueChange={(value) => {
                    onQuantityChange?.(item.name, value)
                    setQuantity(item.name, value)
                  }}
                  min={1}
                  max={10}
                  className="gap-2"
                >
                  <StepperInput
                    accessibilityLabel={`${item.name} quantity`}
                    className="w-8 text-center"
                  />
                  <StepperGroup>
                    <StepperDecrement />
                    <StepperSeparator />
                    <StepperIncrement />
                  </StepperGroup>
                </Stepper>
                <Button
                  variant="link"
                  size="sm"
                  accessibilityLabel={`Remove ${item.name}`}
                  onPress={() => {
                    onRemove?.(item.name)
                    setQuantity(item.name, 0)
                  }}
                  className="h-auto px-0"
                >
                  <Text className="text-sm text-link">Remove</Text>
                </Button>
              </View>
            </View>
          </AnimatedView>
        ))}
        {bag.length > 0 ? (
          <View className="gap-2.5 border-t border-separator pt-5">
            <View className="flex-row justify-between">
              <Text className="text-base">Subtotal</Text>
              <Text className="text-base tabular-nums">{money(subtotal)}</Text>
            </View>
            <View className="flex-row justify-between">
              <Text className="text-base">Shipping</Text>
              <Text className="text-base">FREE</Text>
            </View>
            <View className="flex-row justify-between border-t border-separator pt-3">
              <Text className="text-2xl font-semibold">Total</Text>
              <Text className="text-2xl font-semibold tabular-nums">
                {money(subtotal)}
              </Text>
            </View>
          </View>
        ) : null}
      </ScrollView>
      {bag.length > 0 ? (
        <BottomBar separator>
          <BottomBarContent>
            <Button
              size="lg"
              block
              onPress={() => onCheckout?.("suiss-pay")}
              className="bg-label active:bg-label/80"
            >
              <Text className="text-surface">
                Check Out with{" "}
                <Text className="font-bold text-surface">suiss</Text> Pay
              </Text>
            </Button>
            <Button size="lg" block onPress={() => onCheckout?.("default")}>
              <Text>Check Out</Text>
            </Button>
          </BottomBarContent>
        </BottomBar>
      ) : null}
    </Screen>
  )
}

export { BagReview }
```

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: [Bottom Bar](/docs/components/bottom-bar), [Button](/docs/components/button), [Screen](/docs/components/screen), [Stepper](/docs/interactions/stepper), [Text](/docs/components/text).

3. Copy the source into `components/blocks/bag-review.tsx`:

```tsx title="nativewind/components/blocks/bag-review.tsx"
import * as React from "react"
import { Image, Pressable, ScrollView, View } from "react-native"
import { FadeIn, FadeInDown, ReduceMotion } from "react-native-reanimated"
import {
  Stepper,
  StepperDecrement,
  StepperGroup,
  StepperIncrement,
  StepperInput,
  StepperSeparator,
} from "@/components/interactions/stepper"
import { AnimatedView } from "@/components/ui/animated-view"
import { BottomBar, BottomBarContent } from "@/components/ui/bottom-bar"
import { Button } from "@/components/ui/button"
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 INITIAL_ITEMS = [
  {
    name: "Phone Pro",
    variant: "256 GB · Cosmic Orange",
    price: 1099,
    image: photo("1714972384975-fbd4f19b1bb3"),
    quantity: 1,
  },
  {
    name: "Pods Studio",
    variant: "Midnight",
    price: 549,
    image: photo("1599669454699-248893623440"),
    quantity: 1,
  },
  {
    name: "Phone Pro Clear Case",
    variant: "With MagCharge",
    price: 49,
    image: photo("1703676311066-34caf2cbee33"),
    quantity: 2,
  },
]

const THOUSANDS = /\B(?=(\d{3})+(?!\d))/g

function money(value: number, digits = 2) {
  try {
    return new Intl.NumberFormat("en-US", {
      style: "currency",
      currency: "USD",
      minimumFractionDigits: digits,
      maximumFractionDigits: digits,
    }).format(value)
  } catch {
    const [whole = "0", fraction] = value.toFixed(digits).split(".")
    return `$${whole.replace(THOUSANDS, ",")}${fraction ? `.${fraction}` : ""}`
  }
}

function BagReview({
  onCheckout,
  onShowDetails,
  onContinueShopping,
  onQuantityChange,
  onRemove,
}: {
  onCheckout?: (method: "suiss-pay" | "default") => void
  onShowDetails?: (name: string) => void
  onContinueShopping?: () => void
  onQuantityChange?: (name: string, quantity: number) => void
  onRemove?: (name: string) => void
}) {
  const [items, setItems] = React.useState(INITIAL_ITEMS)
  const bag = items.filter((item) => item.quantity > 0)
  const subtotal = bag.reduce(
    (sum, item) => sum + item.price * item.quantity,
    0
  )

  const setQuantity = (name: string, quantity: number) =>
    setItems((current) =>
      current.map((item) => (item.name === name ? { ...item, quantity } : item))
    )

  return (
    <Screen edges={["top", "right", "left"]}>
      <ScrollView contentContainerClassName="grow px-5 pt-8 pb-8">
        <Text
          role="heading"
          accessibilityLiveRegion="polite"
          className="text-center text-3xl font-semibold"
        >
          {bag.length
            ? `Your bag total is ${money(subtotal)}.`
            : "Your bag is empty."}
        </Text>
        <Text className="mt-2 mb-5 text-center text-base text-label-secondary">
          Free delivery and free returns on every order.
        </Text>
        {bag.length === 0 ? (
          <AnimatedView
            entering={FadeIn.duration(400).reduceMotion(ReduceMotion.System)}
            className="items-center"
          >
            <Button
              size="lg"
              onPress={() => {
                onContinueShopping?.()
                setItems(INITIAL_ITEMS)
              }}
            >
              <Text>Continue Shopping</Text>
            </Button>
          </AnimatedView>
        ) : null}
        {bag.map((item) => (
          <AnimatedView
            key={item.name}
            entering={FadeInDown.duration(700).reduceMotion(
              ReduceMotion.System
            )}
            className="flex-row gap-3 border-t border-separator py-4"
          >
            <Pressable
              role="link"
              accessibilityLabel={`Show details for ${item.name}`}
              onPress={() => onShowDetails?.(item.name)}
              className="active:opacity-60"
            >
              <Image
                source={{ uri: item.image }}
                resizeMode="cover"
                accessibilityIgnoresInvertColors
                className="size-16 rounded-lg bg-control"
              />
            </Pressable>
            <View className="min-w-0 flex-1">
              <View className="gap-0.5">
                <View className="flex-row items-start justify-between gap-3">
                  <Pressable
                    role="link"
                    accessibilityLabel={`Show details for ${item.name}`}
                    onPress={() => onShowDetails?.(item.name)}
                    className="min-w-0 shrink active:opacity-60"
                  >
                    <Text numberOfLines={1} className="text-base font-semibold">
                      {item.name}
                    </Text>
                  </Pressable>
                  <Text className="text-base font-semibold tabular-nums">
                    {money(item.price * item.quantity)}
                  </Text>
                </View>
                <Text
                  numberOfLines={1}
                  className="text-sm text-label-secondary"
                >
                  {item.variant}
                </Text>
              </View>
              <View className="mt-2.5 flex-row items-center justify-between">
                <Stepper
                  value={item.quantity}
                  onValueChange={(value) => {
                    onQuantityChange?.(item.name, value)
                    setQuantity(item.name, value)
                  }}
                  min={1}
                  max={10}
                  className="gap-2"
                >
                  <StepperInput
                    accessibilityLabel={`${item.name} quantity`}
                    className="w-8 text-center"
                  />
                  <StepperGroup>
                    <StepperDecrement />
                    <StepperSeparator />
                    <StepperIncrement />
                  </StepperGroup>
                </Stepper>
                <Button
                  variant="link"
                  size="sm"
                  accessibilityLabel={`Remove ${item.name}`}
                  onPress={() => {
                    onRemove?.(item.name)
                    setQuantity(item.name, 0)
                  }}
                  className="h-auto px-0"
                >
                  <Text className="text-sm text-link">Remove</Text>
                </Button>
              </View>
            </View>
          </AnimatedView>
        ))}
        {bag.length > 0 ? (
          <View className="gap-2.5 border-t border-separator pt-5">
            <View className="flex-row justify-between">
              <Text className="text-base">Subtotal</Text>
              <Text className="text-base tabular-nums">{money(subtotal)}</Text>
            </View>
            <View className="flex-row justify-between">
              <Text className="text-base">Shipping</Text>
              <Text className="text-base">FREE</Text>
            </View>
            <View className="flex-row justify-between border-t border-separator pt-3">
              <Text className="text-2xl font-semibold">Total</Text>
              <Text className="text-2xl font-semibold tabular-nums">
                {money(subtotal)}
              </Text>
            </View>
          </View>
        ) : null}
      </ScrollView>
      {bag.length > 0 ? (
        <BottomBar separator>
          <BottomBarContent>
            <Button
              size="lg"
              block
              onPress={() => onCheckout?.("suiss-pay")}
              className="bg-label active:bg-label-80"
            >
              <Text className="text-surface">
                Check Out with{" "}
                <Text className="font-bold text-surface">suiss</Text> Pay
              </Text>
            </Button>
            <Button size="lg" block onPress={() => onCheckout?.("default")}>
              <Text>Check Out</Text>
            </Button>
          </BottomBarContent>
        </BottomBar>
      ) : null}
    </Screen>
  )
}

export { BagReview }
```

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: [Bottom Bar](/docs/components/bottom-bar), [Button](/docs/components/button), [Screen](/docs/components/screen), [Stepper](/docs/interactions/stepper), [Text](/docs/components/text).

3. Copy the source into `components/blocks/bag-review.tsx`:

```tsx title="stylesheet/components/blocks/bag-review.tsx"
import * as React from "react"
import { Image, Pressable, ScrollView, StyleSheet, View } from "react-native"
import { FadeIn, FadeInDown, ReduceMotion } from "react-native-reanimated"
import {
  Stepper,
  StepperDecrement,
  StepperGroup,
  StepperIncrement,
  StepperInput,
  StepperSeparator,
} from "@/components/interactions/stepper"
import { AnimatedView } from "@/components/ui/animated-view"
import { BottomBar, BottomBarContent } from "@/components/ui/bottom-bar"
import { Button } from "@/components/ui/button"
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 INITIAL_ITEMS = [
  {
    name: "Phone Pro",
    variant: "256 GB · Cosmic Orange",
    price: 1099,
    image: photo("1714972384975-fbd4f19b1bb3"),
    quantity: 1,
  },
  {
    name: "Pods Studio",
    variant: "Midnight",
    price: 549,
    image: photo("1599669454699-248893623440"),
    quantity: 1,
  },
  {
    name: "Phone Pro Clear Case",
    variant: "With MagCharge",
    price: 49,
    image: photo("1703676311066-34caf2cbee33"),
    quantity: 2,
  },
]

const THOUSANDS = /\B(?=(\d{3})+(?!\d))/g

function money(value: number, digits = 2) {
  try {
    return new Intl.NumberFormat("en-US", {
      style: "currency",
      currency: "USD",
      minimumFractionDigits: digits,
      maximumFractionDigits: digits,
    }).format(value)
  } catch {
    const [whole = "0", fraction] = value.toFixed(digits).split(".")
    return `$${whole.replace(THOUSANDS, ",")}${fraction ? `.${fraction}` : ""}`
  }
}

function withAlpha(color: string, alpha: number) {
  if (!color.startsWith("#") || color.length !== 7) return color
  const r = Number.parseInt(color.slice(1, 3), 16)
  const g = Number.parseInt(color.slice(3, 5), 16)
  const b = Number.parseInt(color.slice(5, 7), 16)
  return `rgba(${r}, ${g}, ${b}, ${alpha})`
}

const styles = StyleSheet.create({
  content: {
    flexGrow: 1,
    paddingHorizontal: 20,
    paddingTop: 32,
    paddingBottom: 32,
  },
  title: { ...fontSize["3xl"], fontWeight: "600", textAlign: "center" },
  subtitle: {
    ...fontSize.base,
    marginTop: 8,
    marginBottom: 20,
    textAlign: "center",
  },
  center: { alignItems: "center" },
  row: {
    flexDirection: "row",
    gap: 12,
    borderTopWidth: 1,
    paddingVertical: 16,
  },
  image: { width: 64, height: 64, borderRadius: radius.lg },
  details: { minWidth: 0, flex: 1 },
  info: { gap: 2 },
  nameRow: {
    flexDirection: "row",
    alignItems: "flex-start",
    justifyContent: "space-between",
    gap: 12,
  },
  nameLink: { minWidth: 0, flexShrink: 1 },
  name: { ...fontSize.base, fontWeight: "600" },
  linePrice: {
    ...fontSize.base,
    fontWeight: "600",
    fontVariant: ["tabular-nums"],
  },
  controls: {
    marginTop: 10,
    flexDirection: "row",
    alignItems: "center",
    justifyContent: "space-between",
  },
  stepper: { gap: 8 },
  quantity: { width: 32, textAlign: "center" },
  remove: { height: "auto", paddingHorizontal: 0 },
  summary: { gap: 10, borderTopWidth: 1, paddingTop: 20 },
  line: { flexDirection: "row", justifyContent: "space-between" },
  totalLine: {
    flexDirection: "row",
    justifyContent: "space-between",
    borderTopWidth: 1,
    paddingTop: 12,
  },
  total: { ...fontSize["2xl"], fontWeight: "600" },
  tabular: { fontVariant: ["tabular-nums"] },
})

function BagReview({
  onCheckout,
  onShowDetails,
  onContinueShopping,
  onQuantityChange,
  onRemove,
}: {
  onCheckout?: (method: "suiss-pay" | "default") => void
  onShowDetails?: (name: string) => void
  onContinueShopping?: () => void
  onQuantityChange?: (name: string, quantity: number) => void
  onRemove?: (name: string) => void
}) {
  const { colors } = useTheme()
  const [items, setItems] = React.useState(INITIAL_ITEMS)
  const bag = items.filter((item) => item.quantity > 0)
  const subtotal = bag.reduce(
    (sum, item) => sum + item.price * item.quantity,
    0
  )

  const setQuantity = (name: string, quantity: number) =>
    setItems((current) =>
      current.map((item) => (item.name === name ? { ...item, quantity } : item))
    )

  return (
    <Screen edges={["top", "right", "left"]}>
      <ScrollView contentContainerStyle={styles.content}>
        <Text
          role="heading"
          accessibilityLiveRegion="polite"
          style={styles.title}
        >
          {bag.length
            ? `Your bag total is ${money(subtotal)}.`
            : "Your bag is empty."}
        </Text>
        <Text style={[styles.subtitle, { color: colors.labelSecondary }]}>
          Free delivery and free returns on every order.
        </Text>
        {bag.length === 0 ? (
          <AnimatedView
            entering={FadeIn.duration(400).reduceMotion(ReduceMotion.System)}
            style={styles.center}
          >
            <Button
              size="lg"
              onPress={() => {
                onContinueShopping?.()
                setItems(INITIAL_ITEMS)
              }}
            >
              <Text>Continue Shopping</Text>
            </Button>
          </AnimatedView>
        ) : null}
        {bag.map((item) => (
          <AnimatedView
            key={item.name}
            entering={FadeInDown.duration(700).reduceMotion(
              ReduceMotion.System
            )}
            style={[styles.row, { borderColor: colors.separator }]}
          >
            <Pressable
              role="link"
              accessibilityLabel={`Show details for ${item.name}`}
              onPress={() => onShowDetails?.(item.name)}
              style={({ pressed }) => pressed && { opacity: 0.6 }}
            >
              <Image
                source={{ uri: item.image }}
                resizeMode="cover"
                accessibilityIgnoresInvertColors
                style={[styles.image, { backgroundColor: colors.control }]}
              />
            </Pressable>
            <View style={styles.details}>
              <View style={styles.info}>
                <View style={styles.nameRow}>
                  <Pressable
                    role="link"
                    accessibilityLabel={`Show details for ${item.name}`}
                    onPress={() => onShowDetails?.(item.name)}
                    style={({ pressed }) => [
                      styles.nameLink,
                      pressed && { opacity: 0.6 },
                    ]}
                  >
                    <Text numberOfLines={1} style={styles.name}>
                      {item.name}
                    </Text>
                  </Pressable>
                  <Text style={styles.linePrice}>
                    {money(item.price * item.quantity)}
                  </Text>
                </View>
                <Text
                  numberOfLines={1}
                  style={[fontSize.sm, { color: colors.labelSecondary }]}
                >
                  {item.variant}
                </Text>
              </View>
              <View style={styles.controls}>
                <Stepper
                  value={item.quantity}
                  onValueChange={(value) => {
                    onQuantityChange?.(item.name, value)
                    setQuantity(item.name, value)
                  }}
                  min={1}
                  max={10}
                  style={styles.stepper}
                >
                  <StepperInput
                    accessibilityLabel={`${item.name} quantity`}
                    style={styles.quantity}
                  />
                  <StepperGroup>
                    <StepperDecrement />
                    <StepperSeparator />
                    <StepperIncrement />
                  </StepperGroup>
                </Stepper>
                <Button
                  variant="link"
                  size="sm"
                  accessibilityLabel={`Remove ${item.name}`}
                  onPress={() => {
                    onRemove?.(item.name)
                    setQuantity(item.name, 0)
                  }}
                  style={styles.remove}
                >
                  <Text style={[fontSize.sm, { color: colors.link }]}>
                    Remove
                  </Text>
                </Button>
              </View>
            </View>
          </AnimatedView>
        ))}
        {bag.length > 0 ? (
          <View style={[styles.summary, { borderColor: colors.separator }]}>
            <View style={styles.line}>
              <Text style={fontSize.base}>Subtotal</Text>
              <Text style={[fontSize.base, styles.tabular]}>
                {money(subtotal)}
              </Text>
            </View>
            <View style={styles.line}>
              <Text style={fontSize.base}>Shipping</Text>
              <Text style={fontSize.base}>FREE</Text>
            </View>
            <View style={[styles.totalLine, { borderColor: colors.separator }]}>
              <Text style={styles.total}>Total</Text>
              <Text style={[styles.total, styles.tabular]}>
                {money(subtotal)}
              </Text>
            </View>
          </View>
        ) : null}
      </ScrollView>
      {bag.length > 0 ? (
        <BottomBar separator>
          <BottomBarContent>
            <Button
              size="lg"
              block
              onPress={() => onCheckout?.("suiss-pay")}
              style={({ pressed }) => ({
                backgroundColor: pressed
                  ? withAlpha(colors.label, 0.8)
                  : colors.label,
              })}
            >
              <Text style={{ color: colors.surface }}>
                Check Out with{" "}
                <Text style={{ color: colors.surface, fontWeight: "700" }}>
                  suiss
                </Text>{" "}
                Pay
              </Text>
            </Button>
            <Button size="lg" block onPress={() => onCheckout?.("default")}>
              <Text>Check Out</Text>
            </Button>
          </BottomBarContent>
        </BottomBar>
      ) : null}
    </Screen>
  )
}

export { BagReview }
```

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/BagReview.swift"
import PhosphorSwift
import SwiftUI

public struct BagReview: View {
  public enum CheckoutMethod: CaseIterable, Sendable {
    case suissPay, `default`
  }

  struct Product: Identifiable, Equatable {
    let name: String
    let variant: String
    let price: Double
    let image: URL?
    var quantity: Int

    var id: String { name }
  }

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

  static var initialItems: [Product] {
    [
      Product(name: "Phone Pro", variant: "256 GB · Cosmic Orange", price: 1099, image: photo("1714972384975-fbd4f19b1bb3"), quantity: 1),
      Product(name: "Pods Studio", variant: "Midnight", price: 549, image: photo("1599669454699-248893623440"), quantity: 1),
      Product(name: "Phone Pro Clear Case", variant: "With MagCharge", price: 49, image: photo("1703676311066-34caf2cbee33"), quantity: 2),
    ]
  }

  private var onCheckout: ((CheckoutMethod) -> Void)?
  private var onShowDetails: ((String) -> Void)?
  private var onContinueShopping: (() -> Void)?
  private var onQuantityChange: ((String, Int) -> Void)?
  private var onRemove: ((String) -> Void)?
  @State private var items: [Product]
  @Environment(\.locale) private var locale
  @Environment(\.accessibilityReduceMotion) private var reduceMotion

  public init(
    onCheckout: ((_ method: CheckoutMethod) -> Void)? = nil,
    onShowDetails: ((_ name: String) -> Void)? = nil,
    onContinueShopping: (() -> Void)? = nil,
    onQuantityChange: ((_ name: String, _ quantity: Int) -> Void)? = nil,
    onRemove: ((_ name: String) -> Void)? = nil
  ) {
    self.init(items: Self.initialItems)
    self.onCheckout = onCheckout
    self.onShowDetails = onShowDetails
    self.onContinueShopping = onContinueShopping
    self.onQuantityChange = onQuantityChange
    self.onRemove = onRemove
  }

  init(items: [Product]) {
    _items = State(initialValue: items)
  }

  private var bag: [Product] {
    items.filter { $0.quantity > 0 }
  }

  private var subtotal: Double {
    bag.reduce(0) { $0 + $1.price * Double($1.quantity) }
  }

  private func money(_ value: Double) -> String {
    value.formatted(.currency(code: "USD").locale(locale))
  }

  public var body: some View {
    let bag = bag
    Screen {
      KeyboardScrollView {
        VStack(spacing: 0) {
          VStack(spacing: 8) {
            Group {
              if bag.isEmpty {
                Text("Your bag is empty.")
              } else {
                Text("Your bag total is \(money(subtotal)).")
              }
            }
            .scaledTextStyle(.xl2, weight: .semibold)
            .contentTransition(.numericText())
            .accessibilityAddTraits(.isHeader)
            Text("Free delivery and free returns on every order.")
              .scaledFont(.base)
              .foregroundStyle(Color.labelSecondary)
            if bag.isEmpty {
              Button("Continue Shopping") {
                onContinueShopping?()
                items = Self.initialItems
              }
              .buttonStyle(.variant(.default, size: .lg))
              .padding(.top, 12)
            }
          }
          .multilineTextAlignment(.center)
          .fixedSize(horizontal: false, vertical: true)
          .padding(.top, 32)
          .padding(.bottom, 20)
          ForEach(bag) { item in
            BagReviewRow(
              item: item,
              money: money,
              quantity: binding(item.name),
              onShowDetails: { onShowDetails?(item.name) },
              onRemove: {
                onRemove?(item.name)
                setQuantity(item.name, 0)
              }
            )
            .transition(.opacity.combined(with: .offset(y: 6)))
          }
          if !bag.isEmpty {
            VStack(spacing: 10) {
              BagReviewTotal(label: "Subtotal", value: Text(verbatim: money(subtotal)))
              BagReviewTotal(label: "Shipping", value: Text("FREE"))
              BagReviewTotal(label: "Total", value: Text(verbatim: money(subtotal)), large: true)
                .padding(.top, 12)
                .overlay(alignment: .top) {
                  Color.separator.frame(height: 1)
                }
            }
            .padding(.top, 20)
            .overlay(alignment: .top) {
              Color.separator.frame(height: 1)
            }
          }
        }
        .padding(.horizontal, 20)
        .padding(.bottom, 24)
      }
      if !bag.isEmpty {
        BottomBar {
          BottomBarContent {
            Button {
              onCheckout?(.suissPay)
            } label: {
              Text("Check Out with \(Text(verbatim: "suiss").bold()) Pay")
            }
            .buttonStyle(BagReviewPayStyle())
            Button("Check Out") {
              onCheckout?(.default)
            }
            .buttonStyle(.variant(.default, size: .lg, block: true))
          }
        }
        .transition(.move(edge: .bottom))
      }
    }
    .animation(reduceMotion ? nil : .timingCurve(0.32, 0.72, 0, 1, duration: 0.5), value: items)
  }

  private func binding(_ name: String) -> Binding<Int> {
    Binding(
      get: { items.first { $0.name == name }?.quantity ?? 0 },
      set: { value in
        onQuantityChange?(name, value)
        setQuantity(name, value)
      }
    )
  }

  private func setQuantity(_ name: String, _ quantity: Int) {
    guard let index = items.firstIndex(where: { $0.name == name }) else { return }
    items[index].quantity = quantity
  }
}

private struct BagReviewRow: View {
  let item: BagReview.Product
  let money: (Double) -> String
  @Binding var quantity: Int
  let onShowDetails: () -> Void
  let onRemove: () -> Void

  var body: some View {
    HStack(alignment: .top, spacing: 12) {
      Button(action: onShowDetails) {
        Color.control
          .overlay {
            AsyncImage(url: item.image) { phase in
              if let image = phase.image {
                image.resizable().scaledToFill()
              }
            }
          }
          .frame(width: 64, height: 64)
          .clipShape(RoundedRectangle(cornerRadius: Radius.lg, style: .continuous))
      }
      .buttonStyle(BagReviewPressStyle())
      .accessibilityLabel(Text("Show details for \(item.name)"))
      .accessibilityAddTraits(.isLink)
      VStack(alignment: .leading, spacing: 0) {
        VStack(alignment: .leading, spacing: 2) {
          HStack(alignment: .firstTextBaseline, spacing: 12) {
            Button(action: onShowDetails) {
              Text(verbatim: item.name)
                .scaledFont(.base, weight: .semibold)
                .lineLimit(1)
                .truncationMode(.tail)
            }
            .buttonStyle(BagReviewPressStyle())
            .accessibilityLabel(Text("Show details for \(item.name)"))
            .accessibilityAddTraits(.isLink)
            .frame(maxWidth: .infinity, alignment: .leading)
            Text(verbatim: money(item.price * Double(item.quantity)))
              .scaledFont(.base, weight: .semibold)
              .monospacedDigit()
              .contentTransition(.numericText())
              .fixedSize()
          }
          Text(verbatim: item.variant)
            .scaledFont(.sm)
            .foregroundStyle(Color.labelSecondary)
            .lineLimit(1)
        }
        HStack {
          ValueStepper(value: $quantity, in: 1...10) {
            StepperInput()
              .accessibilityLabel(Text("\(item.name) quantity"))
            StepperGroup {
              StepperDecrement()
              StepperSeparator()
              StepperIncrement()
            }
          }
          .frame(maxWidth: .infinity, alignment: .leading)
          Button("Remove", action: onRemove)
            .buttonStyle(BagReviewLinkStyle())
            .accessibilityLabel(Text("Remove \(item.name)"))
        }
        .padding(.top, 10)
      }
    }
    .padding(.vertical, 16)
    .overlay(alignment: .top) {
      Color.separator.frame(height: 1)
    }
  }
}

private struct BagReviewTotal: View {
  let label: LocalizedStringKey
  let value: Text
  var large = false

  var body: some View {
    HStack {
      Text(label)
        .frame(maxWidth: .infinity, alignment: .leading)
      value.monospacedDigit()
    }
    .scaledFont(large ? .xl2 : .base, weight: large ? .semibold : .regular)
    .accessibilityElement(children: .combine)
  }
}

private struct BagReviewLinkStyle: 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())
  }
}

private struct BagReviewPressStyle: ButtonStyle {
  func makeBody(configuration: Configuration) -> some View {
    configuration.label
      .opacity(configuration.isPressed ? 0.6 : 1)
      .contentShape(Rectangle())
  }
}

private struct BagReviewPayStyle: ButtonStyle {
  @Environment(\.accessibilityReduceMotion) private var reduceMotion

  func makeBody(configuration: Configuration) -> some View {
    configuration.label
      .scaledFont(.base, weight: .medium)
      .foregroundStyle(Color.surface)
      .frame(maxWidth: .infinity, minHeight: 44)
      .background(Color.label.opacity(configuration.isPressed ? 0.8 : 1), in: RoundedRectangle(cornerRadius: Radius.lg, style: .continuous))
      .scaleEffect(configuration.isPressed && !reduceMotion ? 0.98 : 1)
      .contentShape(Rectangle())
  }
}
```

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

public struct BottomBar<Content: View>: View {
  let separator: Bool
  let content: Content

  @Environment(\.screenBackground) private var background

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

  public var body: some View {
    VStack(spacing: 0) {
      content
    }
    .frame(maxWidth: .infinity)
    .background(background.ignoresSafeArea(.container, edges: .bottom))
    .overlay(alignment: .top) {
      if separator {
        Color.separator.frame(height: 1)
      }
    }
    .accessibilityElement(children: .contain)
  }
}

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

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

  public var body: some View {
    VStack(spacing: 8) {
      content
    }
    .padding(.horizontal, 16)
    .padding(.vertical, 12)
    .frame(maxWidth: .infinity)
  }
}
```

```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/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/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/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/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)
  }
}
```

```swift title="swift/Interactions/Stepper.swift"
import PhosphorSwift
import SwiftUI

enum StepperMath {
  static func canChange(_ value: Double, direction: Int, bounds: ClosedRange<Double>) -> Bool {
    direction > 0 ? value < bounds.upperBound : value > bounds.lowerBound
  }

  static func next(_ value: Double, direction: Int, step: Double, bounds: ClosedRange<Double>) -> Double? {
    guard canChange(value, direction: direction, bounds: bounds) else { return nil }
    let precision = max(0, -Int(log10(step).rounded(.down)))
    let factor = pow(10, Double(precision))
    let raw = ((value + Double(direction) * step) * factor).rounded() / factor
    return min(max(raw, bounds.lowerBound), bounds.upperBound)
  }

  static func delay(after count: Int) -> Duration {
    if count == 0 { return .milliseconds(400) }
    return .milliseconds(Int(max(35, 180 * pow(0.86, Double(count)))))
  }
}

struct StepperFormat {
  var format: (Double) -> String
  var parse: (String) -> Double?
}

struct StepperContext {
  var value: Double
  var enabled: Bool
  var format: (Double) -> String
  var parse: (String) -> Double?
  var canChange: @MainActor (Int) -> Bool
  var change: @MainActor (Int) -> Bool
  var set: @MainActor (Double) -> Void
}

extension EnvironmentValues {
  @Entry var stepper: StepperContext?
}

public struct ValueStepper<Content: View>: View {
  let value: Binding<Double>
  let bounds: ClosedRange<Double>
  let step: Double
  let style: (Locale) -> StepperFormat
  let content: Content

  @Environment(\.isEnabled) private var isEnabled
  @Environment(\.locale) private var locale
  @State private var ticks = 0

  public init<F: ParseableFormatStyle>(
    value: Binding<Double>,
    in bounds: ClosedRange<Double> = -Double.infinity...Double.infinity,
    step: Double = 1,
    format: F,
    @ViewBuilder content: () -> Content
  ) where F.FormatInput == Double, F.FormatOutput == String {
    self.value = value
    self.bounds = bounds
    self.step = step
    style = { _ in StepperFormat(format: { format.format($0) }, parse: { try? format.parseStrategy.parse($0) }) }
    self.content = content()
  }

  public init(
    value: Binding<Double>,
    in bounds: ClosedRange<Double> = -Double.infinity...Double.infinity,
    step: Double = 1,
    @ViewBuilder content: () -> Content
  ) {
    self.value = value
    self.bounds = bounds
    self.step = step
    style = { locale in
      let format = FloatingPointFormatStyle<Double>.number.locale(locale)
      return StepperFormat(format: { format.format($0) }, parse: { try? format.parseStrategy.parse($0) })
    }
    self.content = content()
  }

  public init(
    value: Binding<Int>,
    in bounds: ClosedRange<Int>? = nil,
    step: Int = 1,
    @ViewBuilder content: () -> Content
  ) {
    let double = Binding<Double>(
      get: { Double(value.wrappedValue) },
      set: { value.wrappedValue = Int($0.rounded()) }
    )
    let range = bounds.map { Double($0.lowerBound)...Double($0.upperBound) } ?? -Double.infinity...Double.infinity
    self.value = double
    self.bounds = range
    self.step = Double(step)
    style = { locale in
      let format = IntegerFormatStyle<Int>.number.locale(locale)
      return StepperFormat(format: { format.format(Int($0.rounded())) }, parse: { (try? format.parseStrategy.parse($0)).map(Double.init) })
    }
    self.content = content()
  }

  public var body: some View {
    let binding = value
    let bounds = bounds
    let step = step
    let enabled = isEnabled
    let resolved = style(locale)
    let ticks = $ticks
    HStack(spacing: 12) {
      content
    }
    .environment(\.stepper, StepperContext(
      value: binding.wrappedValue,
      enabled: enabled,
      format: resolved.format,
      parse: resolved.parse,
      canChange: { direction in
        enabled && StepperMath.canChange(binding.wrappedValue, direction: direction, bounds: bounds)
      },
      change: { direction in
        guard enabled, let next = StepperMath.next(binding.wrappedValue, direction: direction, step: step, bounds: bounds) else { return false }
        binding.wrappedValue = next
        ticks.wrappedValue += 1
        return true
      },
      set: { next in
        binding.wrappedValue = min(max(next, bounds.lowerBound), bounds.upperBound)
      }
    ))
    .hapticFeedback(.selection, trigger: ticks.wrappedValue)
    .accessibilityElement(children: .contain)
  }
}

public struct StepperInput: View {
  @Environment(\.stepper) private var stepper
  @State private var text = ""
  @FocusState private var focused: Bool

  public init() {}

  public var body: some View {
    let enabled = stepper?.enabled ?? true
    TextField("", text: $text)
      .focused($focused)
      .keyboardType(.decimalPad)
      .multilineTextAlignment(.trailing)
      .font(TextStyle.base.font())
      .tracking(TextStyle.base.letterSpacing)
      .monospacedDigit()
      .foregroundStyle(enabled ? Color.label : .labelQuaternary)
      .tint(Color.accent)
      .padding(.horizontal, 4)
      .frame(width: 64, height: 32)
      .contentShape(RoundedRectangle(cornerRadius: Radius.md, style: .continuous))
      .onAppear { sync() }
      .onChange(of: stepper?.value) { _, _ in
        if !focused { sync() }
      }
      .onChange(of: focused) { _, isFocused in
        if !isFocused { commit() }
      }
      .onSubmit { commit() }
      .accessibilityValue(Text(verbatim: stepper.map { $0.format($0.value) } ?? ""))
      .accessibilityAdjustableAction { direction in
        _ = stepper?.change(direction == .increment ? 1 : -1)
      }
  }

  private func sync() {
    guard let stepper else { return }
    text = stepper.format(stepper.value)
  }

  private func commit() {
    guard let stepper else { return }
    if let parsed = stepper.parse(text) ?? Double(text) {
      stepper.set(parsed)
    }
    text = stepper.format(stepper.value)
  }
}

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

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

  public var body: some View {
    let shape = RoundedRectangle(cornerRadius: Radius.lg, style: .continuous)
    HStack(spacing: 3) {
      content
    }
    .padding(3)
    .frame(height: 32)
    .background(Color.control, in: shape)
    .fixedSize()
    .accessibilityElement(children: .contain)
  }
}

@MainActor
final class StepperPress {
  var handled = false
  var repeating: Task<Void, Never>?
}

struct StepperButton<Label: View>: View {
  let direction: Int
  let label: Label

  @Environment(\.stepper) private var stepper
  @State private var press = StepperPress()

  var body: some View {
    let enabled = stepper?.canChange(direction) ?? false
    Button {
      if press.handled {
        press.handled = false
      } else {
        _ = stepper?.change(direction)
      }
    } label: {
      label
    }
    .buttonStyle(StepperButtonStyle(direction: direction, press: press))
    .disabled(!enabled)
    .accessibilityAction {
      _ = stepper?.change(direction)
    }
  }
}

private struct StepperButtonStyle: ButtonStyle {
  let direction: Int
  let press: StepperPress

  func makeBody(configuration: Configuration) -> some View {
    StepperButtonBody(direction: direction, pressed: configuration.isPressed, press: press, label: configuration.label)
  }
}

private struct StepperButtonBody<Label: View>: View {
  let direction: Int
  let pressed: Bool
  let press: StepperPress
  let label: Label

  @Environment(\.stepper) private var stepper
  @Environment(\.isEnabled) private var isEnabled
  @Environment(\.colorScheme) private var colorScheme

  var body: some View {
    let shape = RoundedRectangle(cornerRadius: Radius.md, style: .continuous)
    label
      .frame(width: 16, height: 16)
      .foregroundStyle(isEnabled ? Color.label : .labelQuaternary)
      .frame(width: 36)
      .frame(maxHeight: .infinity)
      .background {
        if !isEnabled {
          shape.fill(Color.controlDisabled)
        } else if pressed && isEnabled {
          shape.fill(Color.controlPressed)
        } else if colorScheme == .dark {
          shape.fill(Color.labelQuaternary)
        } else {
          shape.fill(Color.surfaceRaised).shadow(.thumb)
        }
      }
      .padding(.vertical, 9)
      .contentShape(Rectangle())
      .padding(.vertical, -9)
      .onChange(of: pressed) { _, isPressed in
        press.repeating?.cancel()
        press.repeating = nil
        guard isPressed else {
          let current = press
          Task { @MainActor in
            try? await Task.sleep(for: .milliseconds(350))
            current.handled = false
          }
          return
        }
        guard let stepper, stepper.change(direction) else { return }
        press.handled = true
        press.repeating = Task { @MainActor in
          var count = 0
          while !Task.isCancelled {
            try? await Task.sleep(for: StepperMath.delay(after: count))
            guard !Task.isCancelled, stepper.change(direction) else { return }
            count += 1
          }
        }
      }
      .onDisappear {
        press.repeating?.cancel()
      }
  }
}

public struct StepperDecrement<Label: View>: View {
  let label: Label

  public init(@ViewBuilder label: () -> Label) {
    self.label = label()
  }

  public var body: some View {
    StepperButton(direction: -1, label: label)
      .accessibilityLabel(Text("Decrease"))
  }
}

extension StepperDecrement where Label == Image {
  public init() {
    self.init { Ph.minus.bold }
  }
}

public struct StepperIncrement<Label: View>: View {
  let label: Label

  public init(@ViewBuilder label: () -> Label) {
    self.label = label()
  }

  public var body: some View {
    StepperButton(direction: 1, label: label)
      .accessibilityLabel(Text("Increase"))
  }
}

extension StepperIncrement where Label == Image {
  public init() {
    self.init { Ph.plus.bold }
  }
}

public struct StepperSeparator: View {
  public init() {}

  public var body: some View {
    Color.separator
      .frame(width: 1, height: 18)
      .accessibilityHidden(true)
  }
}
```

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/BagReview.kt"
package com.esuiss.ui.blocks

import androidx.compose.animation.core.Animatable
import androidx.compose.animation.core.tween
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.Row
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.heightIn
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.rememberScrollState
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.foundation.text.BasicText
import androidx.compose.foundation.verticalScroll
import androidx.compose.runtime.Composable
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.getValue
import androidx.compose.runtime.key
import androidx.compose.runtime.mutableStateListOf
import androidx.compose.runtime.remember
import androidx.compose.ui.Alignment
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.clearAndSetSemantics
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.heading
import androidx.compose.ui.semantics.liveRegion
import androidx.compose.ui.semantics.role
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.style.TextAlign
import androidx.compose.ui.text.style.TextOverflow
import androidx.compose.ui.text.withStyle
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Light
import com.adamglin.phosphoricons.light.DeviceMobile
import com.adamglin.phosphoricons.light.DeviceMobileCamera
import com.adamglin.phosphoricons.light.Headphones
import com.esuiss.ui.components.BottomBar
import com.esuiss.ui.components.BottomBarContent
import com.esuiss.ui.components.Button
import com.esuiss.ui.components.ButtonSize
import com.esuiss.ui.components.Icon
import com.esuiss.ui.components.Screen
import com.esuiss.ui.interactions.Stepper
import com.esuiss.ui.interactions.StepperDecrement
import com.esuiss.ui.interactions.StepperGroup
import com.esuiss.ui.interactions.StepperIncrement
import com.esuiss.ui.interactions.StepperInput
import com.esuiss.ui.interactions.StepperSeparator
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Radius
import com.esuiss.ui.theme.Typography
import java.text.NumberFormat
import java.util.Currency
import java.util.Locale

private class ReviewItem(val name: String, val variant: String, val price: Double, val icon: ImageVector, val quantity: Int)

private val ReviewItems = listOf(
    ReviewItem("Phone Pro", "256 GB · Cosmic Orange", 1099.0, PhosphorIcons.Light.DeviceMobile, 1),
    ReviewItem("Pods Studio", "Midnight", 549.0, PhosphorIcons.Light.Headphones, 1),
    ReviewItem("Phone Pro Clear Case", "With MagCharge", 49.0, PhosphorIcons.Light.DeviceMobileCamera, 2),
)

private fun reviewMoney(value: Double): String =
    NumberFormat.getCurrencyInstance(Locale.US).apply { currency = Currency.getInstance("USD") }.format(value)

@Composable
fun BagReview(
    modifier: Modifier = Modifier,
    onCheckout: (method: String) -> Unit = {},
    onShowDetails: (item: String) -> Unit = {},
    onContinueShopping: () -> Unit = {},
    onQuantityChange: (item: String, quantity: Int) -> Unit = { _, _ -> },
    onRemove: (item: String) -> Unit = {},
) {
    val colors = EsuissTheme.colors
    val items = remember { mutableStateListOf<ReviewItem>().apply { addAll(ReviewItems) } }
    val bag = items.filter { it.quantity > 0 }
    val subtotal = bag.sumOf { it.price * it.quantity }

    fun setQuantity(name: String, quantity: Int) {
        val index = items.indexOfFirst { it.name == name }
        if (index < 0) return
        val item = items[index]
        if (item.quantity == quantity) return
        if (quantity == 0) onRemove(name) else onQuantityChange(name, quantity)
        items[index] = ReviewItem(item.name, item.variant, item.price, item.icon, quantity)
    }

    Screen(modifier) {
        Column(Modifier.fillMaxSize()) {
            Column(
                Modifier
                    .weight(1f)
                    .verticalScroll(rememberScrollState())
                    .padding(horizontal = 20.dp, vertical = 32.dp),
            ) {
                BasicText(
                    if (bag.isNotEmpty()) "Your bag total is ${reviewMoney(subtotal)}." else "Your bag is empty.",
                    modifier = Modifier
                        .fillMaxWidth()
                        .semantics {
                            heading()
                            liveRegion = LiveRegionMode.Polite
                        },
                    style = Typography.xl3.copy(color = colors.label, fontWeight = FontWeight.SemiBold, textAlign = TextAlign.Center),
                )
                BasicText(
                    "Free delivery and free returns on every order.",
                    modifier = Modifier
                        .fillMaxWidth()
                        .padding(top = 8.dp, bottom = 20.dp),
                    style = Typography.base.copy(color = colors.labelSecondary, textAlign = TextAlign.Center),
                )
                if (bag.isEmpty()) {
                    Button(
                        "Continue Shopping",
                        {
                            onContinueShopping()
                            items.clear()
                            items.addAll(ReviewItems)
                        },
                        modifier = Modifier.align(Alignment.CenterHorizontally),
                        size = ButtonSize.Lg,
                    )
                }
                bag.forEach { item ->
                    key(item.name) {
                        ReviewRow(
                            item = item,
                            onQuantity = { setQuantity(item.name, it) },
                            onShowDetails = { onShowDetails(item.name) },
                        )
                    }
                }
                if (bag.isNotEmpty()) {
                    Box(
                        Modifier
                            .fillMaxWidth()
                            .height(1.dp)
                            .background(colors.separator),
                    )
                    Column(
                        Modifier.padding(top = 20.dp),
                        verticalArrangement = Arrangement.spacedBy(10.dp),
                    ) {
                        ReviewTotalRow("Subtotal", reviewMoney(subtotal))
                        ReviewTotalRow("Shipping", "FREE")
                        Box(
                            Modifier
                                .fillMaxWidth()
                                .height(1.dp)
                                .background(colors.separator),
                        )
                        Row(Modifier.padding(top = 2.dp)) {
                            BasicText(
                                "Total",
                                modifier = Modifier.weight(1f),
                                style = Typography.xl2.copy(color = colors.label, fontWeight = FontWeight.SemiBold),
                            )
                            BasicText(
                                reviewMoney(subtotal),
                                style = Typography.xl2.copy(color = colors.label, fontWeight = FontWeight.SemiBold, fontFeatureSettings = "tnum"),
                            )
                        }
                    }
                }
            }
            if (bag.isNotEmpty()) {
                BottomBar(separator = true) {
                    BottomBarContent {
                        ReviewPayButton { onCheckout("SuissPay") }
                        Button("Check Out", { onCheckout("Default") }, size = ButtonSize.Lg, block = true)
                    }
                }
            }
        }
    }
}

@Composable
private fun ReviewRow(item: ReviewItem, onQuantity: (Int) -> Unit, onShowDetails: () -> Unit) {
    val colors = EsuissTheme.colors
    val appear = remember { Animatable(0f) }
    LaunchedEffect(Unit) { appear.animateTo(1f, tween(700)) }
    Column(
        Modifier.graphicsLayer {
            alpha = appear.value
            translationY = (1f - appear.value) * 6.dp.toPx()
        },
    ) {
        Box(
            Modifier
                .fillMaxWidth()
                .height(1.dp)
                .background(colors.separator),
        )
        Row(
            modifier = Modifier.padding(vertical = 16.dp),
            horizontalArrangement = Arrangement.spacedBy(12.dp),
        ) {
            Box(
                Modifier
                    .size(64.dp)
                    .reviewDetailsLink(item.name, onShowDetails)
                    .background(colors.control, RoundedCornerShape(Radius.lg)),
                contentAlignment = Alignment.Center,
            ) {
                Icon(item.icon, contentDescription = null, size = 36.dp, tint = colors.labelSecondary)
            }
            Column(Modifier.weight(1f)) {
                Column(verticalArrangement = Arrangement.spacedBy(2.dp)) {
                    Row(horizontalArrangement = Arrangement.spacedBy(12.dp)) {
                        Box(Modifier.weight(1f)) {
                            BasicText(
                                item.name,
                                modifier = Modifier.reviewDetailsLink(item.name, onShowDetails),
                                style = Typography.base.copy(color = colors.label, fontWeight = FontWeight.SemiBold),
                                maxLines = 1,
                                overflow = TextOverflow.Ellipsis,
                            )
                        }
                        BasicText(
                            reviewMoney(item.price * item.quantity),
                            style = Typography.base.copy(color = colors.label, fontWeight = FontWeight.SemiBold, fontFeatureSettings = "tnum"),
                        )
                    }
                    BasicText(
                        item.variant,
                        style = Typography.sm.copy(color = colors.labelSecondary),
                        maxLines = 1,
                        overflow = TextOverflow.Ellipsis,
                    )
                }
                Row(
                    Modifier
                        .fillMaxWidth()
                        .padding(top = 10.dp),
                    horizontalArrangement = Arrangement.SpaceBetween,
                    verticalAlignment = Alignment.CenterVertically,
                ) {
                    Stepper(
                        value = item.quantity.toDouble(),
                        onValueChange = { onQuantity(it.toInt()) },
                        min = 1.0,
                        max = 10.0,
                    ) {
                        StepperInput(contentDescription = "${item.name} quantity")
                        StepperGroup {
                            StepperDecrement()
                            StepperSeparator()
                            StepperIncrement()
                        }
                    }
                    ReviewLink("Remove", Modifier.semantics { contentDescription = "Remove ${item.name}" }) { onQuantity(0) }
                }
            }
        }
    }
}

@Composable
private fun Modifier.reviewDetailsLink(name: String, onClick: () -> Unit): Modifier {
    val interaction = remember { MutableInteractionSource() }
    val pressed by interaction.collectIsPressedAsState()
    return this
        .graphicsLayer { alpha = if (pressed) 0.6f else 1f }
        .clickable(interactionSource = interaction, indication = null, onClick = onClick)
        .clearAndSetSemantics {
            role = Role.Button
            contentDescription = "Show details for $name"
        }
}

@Composable
private fun ReviewTotalRow(label: String, value: String) {
    val colors = EsuissTheme.colors
    Row {
        BasicText(label, modifier = Modifier.weight(1f), style = Typography.base.copy(color = colors.label))
        BasicText(value, style = Typography.base.copy(color = colors.label, fontFeatureSettings = "tnum"))
    }
}

@Composable
private fun ReviewLink(text: String, modifier: Modifier = Modifier, 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),
    )
}

@Composable
private fun ReviewPayButton(onClick: () -> Unit) {
    val colors = EsuissTheme.colors
    val interaction = remember { MutableInteractionSource() }
    val pressed by interaction.collectIsPressedAsState()
    val shape = RoundedCornerShape(Radius.lg)
    Box(
        Modifier
            .fillMaxWidth()
            .heightIn(min = ButtonSize.Lg.height)
            .graphicsLayer {
                val scale = if (pressed) 0.98f else 1f
                scaleX = scale
                scaleY = scale
            }
            .background(colors.label.copy(alpha = if (pressed) 0.8f else 1f), shape)
            .clickable(interactionSource = interaction, indication = null, onClick = onClick)
            .semantics(mergeDescendants = true) { role = Role.Button },
        contentAlignment = Alignment.Center,
    ) {
        BasicText(
            buildAnnotatedString {
                append("Check Out with ")
                withStyle(SpanStyle(fontWeight = FontWeight.Bold)) { append("suiss") }
                append(" Pay")
            },
            style = Typography.base.copy(color = colors.surface, fontWeight = FontWeight.Medium),
        )
    }
}
```

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

import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.ColumnScope
import androidx.compose.foundation.layout.WindowInsets
import androidx.compose.foundation.layout.WindowInsetsSides
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.only
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.safeDrawing
import androidx.compose.foundation.layout.windowInsetsPadding
import androidx.compose.runtime.Composable
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.drawBehind
import androidx.compose.ui.geometry.Offset
import androidx.compose.ui.geometry.Size
import androidx.compose.ui.platform.LocalDensity
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.EsuissTheme

@Composable
fun BottomBar(
    modifier: Modifier = Modifier,
    separator: Boolean = false,
    content: @Composable ColumnScope.() -> Unit,
) {
    val colors = EsuissTheme.colors
    Column(
        modifier = modifier
            .fillMaxWidth()
            .background(colors.surface)
            .then(
                if (separator) {
                    Modifier.drawBehind { drawRect(colors.separator, Offset.Zero, Size(size.width, 1.dp.toPx())) }
                } else {
                    Modifier
                },
            )
            .windowInsetsPadding(WindowInsets.safeDrawing.only(WindowInsetsSides.Bottom + WindowInsetsSides.Horizontal))
            .padding(bottom = with(LocalDensity.current) { (LocalKeyboardAccessory.current?.height ?: 0).toDp() }),
        content = content,
    )
}

@Composable
fun BottomBarContent(
    modifier: Modifier = Modifier,
    horizontalAlignment: Alignment.Horizontal = Alignment.CenterHorizontally,
    content: @Composable ColumnScope.() -> Unit,
) {
    Column(
        modifier = modifier
            .fillMaxWidth()
            .padding(horizontal = 16.dp, vertical = 12.dp),
        verticalArrangement = Arrangement.spacedBy(8.dp),
        horizontalAlignment = horizontalAlignment,
        content = content,
    )
}
```

```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/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/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/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/interactions/Stepper.kt"
package com.esuiss.ui.interactions

import androidx.compose.foundation.background
import androidx.compose.foundation.gestures.awaitEachGesture
import androidx.compose.foundation.gestures.awaitFirstDown
import androidx.compose.foundation.gestures.waitForUpOrCancellation
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.interaction.collectIsFocusedAsState
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.fillMaxHeight
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.width
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.foundation.text.BasicTextField
import androidx.compose.foundation.text.KeyboardActions
import androidx.compose.foundation.text.KeyboardOptions
import androidx.compose.foundation.text.selection.LocalTextSelectionColors
import androidx.compose.foundation.text.selection.TextSelectionColors
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.Immutable
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.rememberCoroutineScope
import androidx.compose.runtime.rememberUpdatedState
import androidx.compose.runtime.setValue
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.focus.FocusManager
import androidx.compose.ui.graphics.SolidColor
import androidx.compose.ui.graphics.vector.ImageVector
import androidx.compose.ui.input.pointer.pointerInput
import androidx.compose.ui.platform.LocalFocusManager
import androidx.compose.ui.semantics.Role
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.disabled
import androidx.compose.ui.semantics.onClick
import androidx.compose.ui.semantics.role
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.text.input.ImeAction
import androidx.compose.ui.text.input.KeyboardType
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Bold
import com.adamglin.phosphoricons.bold.Minus
import com.adamglin.phosphoricons.bold.Plus
import com.esuiss.ui.components.FormShadowSm
import com.esuiss.ui.components.Icon
import com.esuiss.ui.components.LocalContentColor
import com.esuiss.ui.components.LocalIconSize
import com.esuiss.ui.components.rememberHaptics
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Radius
import com.esuiss.ui.theme.Typography
import com.esuiss.ui.theme.shadow
import java.text.NumberFormat
import java.text.ParsePosition
import kotlin.math.floor
import kotlin.math.log10
import kotlin.math.max
import kotlin.math.pow
import kotlinx.coroutines.Job
import kotlinx.coroutines.delay
import kotlinx.coroutines.launch

private const val StartDelay = 400L

private const val FirstTick = 180.0

private const val MinTick = 35.0

private const val Acceleration = 0.86

@Immutable
private class StepperContext(
    val value: Double,
    val enabled: Boolean,
    val format: NumberFormat,
    val canChange: (Int) -> Boolean,
    val change: (Int) -> Boolean,
    val commit: (Double) -> Unit,
)

private val LocalStepper = staticCompositionLocalOf<StepperContext?> { null }

private fun stepperContext(): Nothing = error("Stepper parts must be used within a Stepper")

@Composable
fun Stepper(
    value: Double,
    onValueChange: (Double) -> Unit,
    modifier: Modifier = Modifier,
    min: Double = Double.NEGATIVE_INFINITY,
    max: Double = Double.POSITIVE_INFINITY,
    step: Double = 1.0,
    enabled: Boolean = true,
    format: NumberFormat = remember { NumberFormat.getNumberInstance() },
    content: @Composable RowScope.() -> Unit,
) {
    val currentValue by rememberUpdatedState(value)
    val currentOnValueChange by rememberUpdatedState(onValueChange)
    val currentHaptics by rememberUpdatedState(rememberHaptics())
    val canChange: (Int) -> Boolean = { direction ->
        enabled && if (direction > 0) currentValue < max else currentValue > min
    }
    val context = StepperContext(
        value = value,
        enabled = enabled,
        format = format,
        canChange = canChange,
        change = { direction ->
            if (!canChange(direction)) {
                false
            } else {
                val precision = max(0, -floor(log10(step)).toInt())
                val factor = 10.0.pow(precision)
                val next = Math.round((currentValue + direction * step) * factor) / factor
                currentHaptics.selection()
                currentOnValueChange(next.coerceIn(min, max))
                true
            }
        },
        commit = { next -> currentOnValueChange(next.coerceIn(min, max)) },
    )
    CompositionLocalProvider(LocalStepper provides context) {
        Row(
            modifier = modifier,
            horizontalArrangement = Arrangement.spacedBy(12.dp),
            verticalAlignment = Alignment.CenterVertically,
            content = content,
        )
    }
}

@Composable
fun StepperInput(
    modifier: Modifier = Modifier,
    contentDescription: String? = null,
) {
    val stepper = LocalStepper.current ?: stepperContext()
    val colors = EsuissTheme.colors
    val interaction = remember { MutableInteractionSource() }
    val focused by interaction.collectIsFocusedAsState()
    val formatted = stepper.format.format(stepper.value)
    var text by remember { mutableStateOf(formatted) }
    LaunchedEffect(formatted, focused) {
        if (!focused) text = formatted
    }
    val focusManager = LocalFocusManager.current
    val commit = {
        val position = ParsePosition(0)
        val parsed = stepper.format.parse(text.trim(), position)
        if (parsed != null && position.index > 0) stepper.commit(parsed.toDouble())
        text = stepper.format.format(stepper.value)
    }
    LaunchedEffect(focused) {
        if (!focused && text != formatted) commit()
    }
    CompositionLocalProvider(
        LocalTextSelectionColors provides TextSelectionColors(colors.accent, colors.accent.copy(alpha = 0.3f)),
    ) {
        BasicTextField(
            value = text,
            onValueChange = { text = it },
            modifier = modifier
                .height(32.dp)
                .width(64.dp)
                .padding(horizontal = 4.dp)
                .then(
                    if (contentDescription != null) {
                        Modifier.semantics { this.contentDescription = contentDescription }
                    } else {
                        Modifier
                    },
                ),
            enabled = stepper.enabled,
            singleLine = true,
            textStyle = Typography.base.copy(
                color = if (stepper.enabled) colors.label else colors.labelQuaternary,
                textAlign = TextAlign.End,
                fontFeatureSettings = "tnum",
            ),
            keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Decimal, imeAction = ImeAction.Done),
            keyboardActions = KeyboardActions(onDone = { focusManager.clearFocusAndCommit(commit) }),
            interactionSource = interaction,
            cursorBrush = SolidColor(colors.accent),
            decorationBox = { inner ->
                Box(contentAlignment = Alignment.CenterEnd) { inner() }
            },
        )
    }
}

private fun FocusManager.clearFocusAndCommit(commit: () -> Unit) {
    commit()
    clearFocus()
}

@Composable
fun StepperGroup(
    modifier: Modifier = Modifier,
    content: @Composable RowScope.() -> Unit,
) {
    Row(
        modifier = modifier
            .height(32.dp)
            .background(EsuissTheme.colors.control, RoundedCornerShape(Radius.lg))
            .padding(3.dp),
        horizontalArrangement = Arrangement.spacedBy(3.dp),
        verticalAlignment = Alignment.CenterVertically,
        content = content,
    )
}

@Composable
fun StepperDecrement(
    modifier: Modifier = Modifier,
    contentDescription: String = "Decrease",
    content: (@Composable () -> Unit)? = null,
) {
    StepperButton(-1, PhosphorIcons.Bold.Minus, contentDescription, modifier, content)
}

@Composable
fun StepperIncrement(
    modifier: Modifier = Modifier,
    contentDescription: String = "Increase",
    content: (@Composable () -> Unit)? = null,
) {
    StepperButton(1, PhosphorIcons.Bold.Plus, contentDescription, modifier, content)
}

@Composable
fun StepperSeparator(modifier: Modifier = Modifier) {
    Box(
        modifier = modifier
            .width(1.dp)
            .height(18.dp)
            .background(EsuissTheme.colors.separator),
    )
}

@Composable
private fun StepperButton(
    direction: Int,
    icon: ImageVector,
    contentDescription: String,
    modifier: Modifier,
    content: (@Composable () -> Unit)?,
) {
    val stepper = LocalStepper.current ?: stepperContext()
    val colors = EsuissTheme.colors
    val enabled = stepper.canChange(direction)
    val currentStepper by rememberUpdatedState(stepper)
    val scope = rememberCoroutineScope()
    var pressed by remember { mutableStateOf(false) }
    val shape = RoundedCornerShape(Radius.md)
    val surface = when {
        !enabled -> Modifier.background(colors.controlDisabled, shape)
        pressed && enabled -> Modifier.background(colors.controlPressed, shape)
        colors.isDark -> Modifier.background(colors.labelQuaternary, shape)
        else -> Modifier.shadow(FormShadowSm, shape).background(colors.surfaceRaised, shape)
    }
    Box(
        modifier = modifier
            .fillMaxHeight()
            .width(36.dp)
            .then(surface)
            .semantics {
                this.contentDescription = contentDescription
                role = Role.Button
                if (enabled) {
                    onClick {
                        currentStepper.change(direction)
                    }
                } else {
                    disabled()
                }
            }
            .pointerInput(enabled) {
                if (!enabled) return@pointerInput
                awaitEachGesture {
                    awaitFirstDown()
                    pressed = true
                    var repeat: Job? = null
                    if (currentStepper.change(direction)) {
                        repeat = scope.launch {
                            delay(StartDelay)
                            var count = 1
                            while (currentStepper.change(direction)) {
                                delay(max(MinTick, FirstTick * Acceleration.pow(count)).toLong())
                                count++
                            }
                        }
                    }
                    waitForUpOrCancellation()
                    repeat?.cancel()
                    pressed = false
                }
            },
        contentAlignment = Alignment.Center,
    ) {
        val tint = if (enabled) colors.label else colors.labelQuaternary
        CompositionLocalProvider(LocalContentColor provides tint, LocalIconSize provides 16.dp) {
            if (content != null) content() else Icon(icon, contentDescription = null, size = 16.dp, tint = tint)
        }
    }
}
```

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

## Usage

```tsx
import { BagReview } from "@/components/blocks/bag-review"
```

```tsx
<BagReview />
```

Replace `INITIAL_ITEMS` with your cart lines. Wire `onCheckout`, `onShowDetails`, `onContinueShopping`, `onQuantityChange` and `onRemove` to your cart logic.