# Tabs

A set of tabs that switch between panels of content shown in the same place.

Tabs is an open-source mobile component 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/components/tabs

![Preview](https://uim.suiss.app/previews/components-tabs--default.light.webp)

```tsx
import * as React from "react"
import { View } from "react-native"
import { Button } from "@/components/ui/button"
import { Card, CardContent, CardDescription, CardFooter, CardHeader, CardTitle } from "@/components/ui/card"
import { Input } from "@/components/ui/input"
import { Label } from "@/components/ui/label"
import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs"
import { Text } from "@/components/ui/text"

function TabsDemo() {
  const [value, setValue] = React.useState("account")
  return (
    <Tabs value={value} onValueChange={setValue} className="w-full">
      <TabsList>
        <TabsTrigger value="account">
          <Text>Account</Text>
        </TabsTrigger>
        <TabsTrigger value="password">
          <Text>Password</Text>
        </TabsTrigger>
      </TabsList>
      <TabsContent value="account">
        <Card>
          <CardHeader>
            <CardTitle>Account</CardTitle>
            <CardDescription>
              Make changes to your account here.
            </CardDescription>
          </CardHeader>
          <CardContent className="gap-4">
            <View className="gap-2">
              <Label nativeID="tabs-name">Name</Label>
              <Input
                accessibilityLabelledBy="tabs-name"
                defaultValue="Pedro Duarte"
              />
            </View>
            <View className="gap-2">
              <Label nativeID="tabs-username">Username</Label>
              <Input
                accessibilityLabelledBy="tabs-username"
                defaultValue="@peduarte"
                autoCapitalize="none"
              />
            </View>
          </CardContent>
          <CardFooter>
            <Button>
              <Text>Save changes</Text>
            </Button>
          </CardFooter>
        </Card>
      </TabsContent>
      <TabsContent value="password">
        <Card>
          <CardHeader>
            <CardTitle>Password</CardTitle>
            <CardDescription>
              Change your password here. You will be logged out after saving.
            </CardDescription>
          </CardHeader>
          <CardContent className="gap-4">
            <View className="gap-2">
              <Label nativeID="tabs-current">Current password</Label>
              <Input accessibilityLabelledBy="tabs-current" secureTextEntry />
            </View>
            <View className="gap-2">
              <Label nativeID="tabs-new">New password</Label>
              <Input accessibilityLabelledBy="tabs-new" secureTextEntry />
            </View>
          </CardContent>
          <CardFooter>
            <Button>
              <Text>Save password</Text>
            </Button>
          </CardFooter>
        </Card>
      </TabsContent>
    </Tabs>
  )
}

export function TabsExample() {
  return (
    <TabsDemo />
  )
}
```

```swift
import EsuissUI
import SwiftUI

struct TabsDemo: View {
  @State private var value = "account"
  @State private var name = "Pedro Duarte"
  @State private var username = "@peduarte"
  @State private var current = ""
  @State private var next = ""

  var body: some View {
    Tabs(selection: $value) {
      TabsList {
        TabsTrigger("Account", value: "account")
        TabsTrigger("Password", value: "password")
      }
      TabsContent(value: "account") {
        Card {
          CardHeader("Account", description: "Make changes to your account here.")
          CardContent {
            VStack(alignment: .leading, spacing: 16) {
              TabsLabeledField(label: "Name") {
                TextField("Name", text: $name).textFieldStyle(.input)
              }
              TabsLabeledField(label: "Username") {
                TextField("Username", text: $username)
                  .textFieldStyle(.input)
                  .textInputAutocapitalization(.never)
              }
            }
          }
          CardFooter {
            Button("Save changes") {}.buttonStyle(.variant())
          }
        }
      }
      TabsContent(value: "password") {
        Card {
          CardHeader("Password", description: "Change your password here. You will be logged out after saving.")
          CardContent {
            VStack(alignment: .leading, spacing: 16) {
              TabsLabeledField(label: "Current password") {
                SecureField("Current password", text: $current).textFieldStyle(.input)
              }
              TabsLabeledField(label: "New password") {
                SecureField("New password", text: $next).textFieldStyle(.input)
              }
            }
          }
          CardFooter {
            Button("Save password") {}.buttonStyle(.variant())
          }
        }
      }
    }
    .frame(maxWidth: .infinity)
  }
}

struct TabsLabeledField<Content: View>: View {
  let label: LocalizedStringKey
  @ViewBuilder let content: () -> Content

  var body: some View {
    VStack(alignment: .leading, spacing: 8) {
      FieldLabel(label)
        .accessibilityHidden(true)
      content()
        .frame(maxWidth: .infinity)
    }
  }
}
```

```kotlin
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.text.KeyboardOptions
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.text.input.KeyboardCapitalization
import androidx.compose.ui.text.input.KeyboardType
import androidx.compose.ui.text.input.PasswordVisualTransformation
import androidx.compose.ui.text.input.VisualTransformation
import androidx.compose.ui.unit.dp
import com.esuiss.ui.components.Button
import com.esuiss.ui.components.Card
import com.esuiss.ui.components.CardContent
import com.esuiss.ui.components.CardFooter
import com.esuiss.ui.components.CardHeader
import com.esuiss.ui.components.Input
import com.esuiss.ui.components.Label
import com.esuiss.ui.components.Tabs
import com.esuiss.ui.components.TabsContent
import com.esuiss.ui.components.TabsList
import com.esuiss.ui.components.TabsTrigger

@Composable
fun TabsField(label: String, initial: String, password: Boolean = false, capitalize: Boolean = true) {
    var value by rememberSaveable(label) { mutableStateOf(initial) }
    Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
        Label(label)
        Input(
            value,
            { value = it },
            Modifier.semantics { contentDescription = label },
            keyboardOptions = when {
                password -> KeyboardOptions(keyboardType = KeyboardType.Password)
                capitalize -> KeyboardOptions.Default
                else -> KeyboardOptions(capitalization = KeyboardCapitalization.None, autoCorrectEnabled = false)
            },
            visualTransformation = if (password) PasswordVisualTransformation() else VisualTransformation.None,
        )
    }
}

@Composable
fun TabsDemo() {
    var value by rememberSaveable { mutableStateOf("account") }
    Tabs(value, { value = it }, Modifier.fillMaxWidth()) {
        TabsList {
            TabsTrigger("account", "Account")
            TabsTrigger("password", "Password")
        }
        TabsContent("account") {
            Card(Modifier.fillMaxWidth()) {
                CardHeader("Account", description = "Make changes to your account here.")
                CardContent {
                    Column(verticalArrangement = Arrangement.spacedBy(16.dp)) {
                        TabsField("Name", "Pedro Duarte")
                        TabsField("Username", "@peduarte", capitalize = false)
                    }
                }
                CardFooter {
                    Button("Save changes", onClick = {})
                }
            }
        }
        TabsContent("password") {
            Card(Modifier.fillMaxWidth()) {
                CardHeader("Password", description = "Change your password here. You will be logged out after saving.")
                CardContent {
                    Column(verticalArrangement = Arrangement.spacedBy(16.dp)) {
                        TabsField("Current password", "", password = true)
                        TabsField("New password", "", password = true)
                    }
                }
                CardFooter {
                    Button("Save password", onClick = {})
                }
            }
        }
    }
}
```

`Tabs` groups a `TabsList` of `TabsTrigger` buttons with matching `TabsContent` panels. The active tab is marked by an indicator that slides between tabs with a Reanimated layout transition.

`TabsList` has two variants: `default`, a segmented control with a raised indicator on a filled track, and `line`, a transparent list with a thin underline. Both work in horizontal and vertical orientation.

## Installation

```bash title="Terminal"
npx @esuiss/uim@latest add tabs
```

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

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

The CLI also adds what it builds on: [Text](/docs/components/text).

### Manual

**Uniwind**

1. Install the dependencies:

```bash title="Terminal"
npx expo install class-variance-authority cn react-native-reanimated react-native-worklets
```

2. Add the pieces it builds on: [Text](/docs/components/text), and the primitives `components/primitives/tabs.tsx`, `components/primitives/use-render.tsx`.

3. Copy the source into `components/ui/tabs.tsx`:

```tsx title="uniwind/components/ui/tabs.tsx"
import { cva, type VariantProps } from "class-variance-authority"
import { cn } from "cn"
import * as React from "react"
import Animated, {
  Easing,
  LinearTransition,
  ReduceMotion,
} from "react-native-reanimated"
import * as TabsPrimitive from "@/components/primitives/tabs"
import { resolveClassName } from "@/components/primitives/use-render"
import { TextClassContext } from "@/components/ui/text"

type TabsListVariant = NonNullable<
  VariantProps<typeof tabsListVariants>["variant"]
>

const TabsListContext = React.createContext<TabsListVariant>("default")

const INDICATOR_TRANSITION = LinearTransition.duration(300)
  .easing(Easing.bezier(0.32, 0.72, 0, 1))
  .reduceMotion(ReduceMotion.System)

function Tabs({
  className,
  ...props
}: React.ComponentProps<typeof TabsPrimitive.Root>) {
  return (
    <TabsPrimitive.Root
      className={(state) =>
        cn(
          "gap-2",
          state.orientation === "vertical" ? "flex-row" : "flex-col",
          resolveClassName(className, state)
        )
      }
      {...props}
    />
  )
}

const tabsListVariants = cva(
  "relative shrink-0 flex-row items-center justify-center gap-1 self-start",
  {
    variants: {
      variant: {
        default: "rounded-xl bg-control p-1",
        line: "bg-transparent p-0.5",
      },
    },
    defaultVariants: {
      variant: "default",
    },
  }
)

function TabsIndicator({ variant }: { variant: TabsListVariant }) {
  return (
    <TabsPrimitive.Indicator
      className={cn(
        variant === "line"
          ? "bg-label"
          : "rounded-md bg-surface-raised shadow-sm dark:bg-label-quaternary"
      )}
      style={(state) => {
        if (variant !== "line") return undefined
        const position = state.activeTabPosition
        const size = state.activeTabSize
        if (!position || !size) return undefined
        return state.orientation === "vertical"
          ? { left: position.left + size.width + 2, width: 2 }
          : { top: position.top + size.height + 3, height: 2 }
      }}
      render={<Animated.View layout={INDICATOR_TRANSITION} />}
    />
  )
}

function TabsList({
  className,
  variant = "default",
  children,
  ...props
}: React.ComponentProps<typeof TabsPrimitive.List> &
  VariantProps<typeof tabsListVariants>) {
  const resolved = variant ?? "default"
  return (
    <TabsListContext.Provider value={resolved}>
      <TabsPrimitive.List
        className={(state) =>
          cn(
            tabsListVariants({ variant: resolved }),
            state.orientation === "vertical"
              ? "flex-col items-stretch"
              : resolved === "line"
                ? "h-10.25 pb-1.75"
                : "h-11",
            resolveClassName(className, state)
          )
        }
        {...props}
      >
        <TabsIndicator variant={resolved} />
        {children}
      </TabsPrimitive.List>
    </TabsListContext.Provider>
  )
}

function TabsTrigger({
  className,
  disabled,
  ...props
}: React.ComponentProps<typeof TabsPrimitive.Tab>) {
  const { value, orientation } = TabsPrimitive.useRootContext()
  const active = value === props.value
  return (
    <TextClassContext.Provider
      value={cn(
        "text-sm",
        disabled
          ? "text-label-quaternary"
          : active
            ? "text-label"
            : "text-label-secondary"
      )}
    >
      <TabsPrimitive.Tab
        disabled={disabled}
        className={(state) =>
          cn(
            "flex-row items-center justify-center gap-2 rounded-md px-3 py-1",
            orientation === "vertical"
              ? "h-9 w-full justify-start"
              : "h-full flex-1",
            resolveClassName(className, state)
          )
        }
        {...props}
      />
    </TextClassContext.Provider>
  )
}

function TabsContent({
  className,
  ...props
}: React.ComponentProps<typeof TabsPrimitive.Panel>) {
  return (
    <TabsPrimitive.Panel
      className={(state) => cn("grow", resolveClassName(className, state))}
      {...props}
    />
  )
}

export { Tabs, TabsContent, TabsList, TabsTrigger, tabsListVariants }
```

4. Update the import paths to match your project.

**NativeWind**

1. Install the dependencies:

```bash title="Terminal"
npx expo install class-variance-authority cn react-native-reanimated react-native-worklets
```

2. Add the pieces it builds on: [Text](/docs/components/text), and the primitives `components/primitives/tabs.tsx`, `components/primitives/use-render.tsx`.

3. Copy the source into `components/ui/tabs.tsx`:

```tsx title="nativewind/components/ui/tabs.tsx"
import { cva, type VariantProps } from "class-variance-authority"
import { cn } from "cn"
import * as React from "react"
import Animated, {
  Easing,
  LinearTransition,
  ReduceMotion,
} from "react-native-reanimated"
import * as TabsPrimitive from "@/components/primitives/tabs"
import { resolveClassName } from "@/components/primitives/use-render"
import { TextClassContext } from "@/components/ui/text"

type TabsListVariant = NonNullable<
  VariantProps<typeof tabsListVariants>["variant"]
>

const TabsListContext = React.createContext<TabsListVariant>("default")

const INDICATOR_TRANSITION = LinearTransition.duration(300)
  .easing(Easing.bezier(0.32, 0.72, 0, 1))
  .reduceMotion(ReduceMotion.System)

function Tabs({
  className,
  ...props
}: React.ComponentProps<typeof TabsPrimitive.Root>) {
  return (
    <TabsPrimitive.Root
      className={(state) =>
        cn(
          "gap-2",
          state.orientation === "vertical" ? "flex-row" : "flex-col",
          resolveClassName(className, state)
        )
      }
      {...props}
    />
  )
}

const tabsListVariants = cva(
  "relative shrink-0 flex-row items-center justify-center gap-1 self-start",
  {
    variants: {
      variant: {
        default: "rounded-xl bg-control p-1",
        line: "bg-transparent p-0.5",
      },
    },
    defaultVariants: {
      variant: "default",
    },
  }
)

function TabsIndicator({ variant }: { variant: TabsListVariant }) {
  return (
    <TabsPrimitive.Indicator
      className={cn(
        variant === "line"
          ? "bg-label"
          : "rounded-md bg-surface-raised shadow dark:bg-label-quaternary"
      )}
      style={(state) => {
        if (variant !== "line") return undefined
        const position = state.activeTabPosition
        const size = state.activeTabSize
        if (!position || !size) return undefined
        return state.orientation === "vertical"
          ? { left: position.left + size.width + 2, width: 2 }
          : { top: position.top + size.height + 3, height: 2 }
      }}
      render={<Animated.View layout={INDICATOR_TRANSITION} />}
    />
  )
}

function TabsList({
  className,
  variant = "default",
  children,
  ...props
}: React.ComponentProps<typeof TabsPrimitive.List> &
  VariantProps<typeof tabsListVariants>) {
  const resolved = variant ?? "default"
  return (
    <TabsListContext.Provider value={resolved}>
      <TabsPrimitive.List
        className={(state) =>
          cn(
            tabsListVariants({ variant: resolved }),
            state.orientation === "vertical"
              ? "flex-col items-stretch"
              : resolved === "line"
                ? "h-[2.5625rem] pb-[0.4375rem]"
                : "h-11",
            resolveClassName(className, state)
          )
        }
        {...props}
      >
        <TabsIndicator variant={resolved} />
        {children}
      </TabsPrimitive.List>
    </TabsListContext.Provider>
  )
}

function TabsTrigger({
  className,
  disabled,
  ...props
}: React.ComponentProps<typeof TabsPrimitive.Tab>) {
  const { value, orientation } = TabsPrimitive.useRootContext()
  const active = value === props.value
  return (
    <TextClassContext.Provider
      value={cn(
        "text-sm",
        disabled
          ? "text-label-quaternary"
          : active
            ? "text-label"
            : "text-label-secondary"
      )}
    >
      <TabsPrimitive.Tab
        disabled={disabled}
        className={(state) =>
          cn(
            "flex-row items-center justify-center gap-2 rounded-md px-3 py-1",
            orientation === "vertical"
              ? "h-9 w-full justify-start"
              : "h-full flex-1",
            resolveClassName(className, state)
          )
        }
        {...props}
      />
    </TextClassContext.Provider>
  )
}

function TabsContent({
  className,
  ...props
}: React.ComponentProps<typeof TabsPrimitive.Panel>) {
  return (
    <TabsPrimitive.Panel
      className={(state) => cn("grow", resolveClassName(className, state))}
      {...props}
    />
  )
}

export { Tabs, TabsContent, TabsList, TabsTrigger, tabsListVariants }
```

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: [Text](/docs/components/text), and the primitives `components/primitives/tabs.tsx`, `components/primitives/use-render.tsx`.

3. Copy the source into `components/ui/tabs.tsx`:

```tsx title="stylesheet/components/ui/tabs.tsx"
import * as React from "react"
import { StyleSheet } from "react-native"
import Animated, {
  Easing,
  LinearTransition,
  ReduceMotion,
} from "react-native-reanimated"
import * as TabsPrimitive from "@/components/primitives/tabs"
import { TextStyleContext } from "@/components/ui/text"
import { fontSize, radius, shadow, useTheme } from "@/components/ui/theme"

type TabsListVariant = "default" | "line"

const TabsListContext = React.createContext<TabsListVariant>("default")

const INDICATOR_TRANSITION = LinearTransition.duration(300)
  .easing(Easing.bezier(0.32, 0.72, 0, 1))
  .reduceMotion(ReduceMotion.System)

const styles = StyleSheet.create({
  root: { gap: 8 },
  rootHorizontal: { flexDirection: "column" },
  rootVertical: { flexDirection: "row" },
  list: {
    position: "relative",
    flexShrink: 0,
    flexDirection: "row",
    alignItems: "center",
    justifyContent: "center",
    alignSelf: "flex-start",
    gap: 4,
  },
  listDefault: { borderRadius: radius.xl, padding: 4, height: 44 },
  listLine: { padding: 2, height: 41, paddingBottom: 7 },
  listVertical: {
    height: "auto",
    flexDirection: "column",
    alignItems: "stretch",
  },
  indicatorDefault: { borderRadius: radius.md, ...shadow.sm },
  trigger: {
    flexDirection: "row",
    alignItems: "center",
    justifyContent: "center",
    gap: 8,
    borderRadius: radius.md,
    paddingHorizontal: 12,
    paddingVertical: 4,
  },
  triggerHorizontal: { height: "100%", flexGrow: 1, flexShrink: 1 },
  triggerVertical: { height: 36, width: "100%", justifyContent: "flex-start" },
  content: { flexGrow: 1 },
})

function Tabs({
  style,
  ...props
}: React.ComponentProps<typeof TabsPrimitive.Root>) {
  return (
    <TabsPrimitive.Root
      style={(state) => [
        styles.root,
        state.orientation === "vertical"
          ? styles.rootVertical
          : styles.rootHorizontal,
        typeof style === "function" ? style(state) : style,
      ]}
      {...props}
    />
  )
}

function TabsIndicator({ variant }: { variant: TabsListVariant }) {
  const { colors, isDark } = useTheme()
  return (
    <TabsPrimitive.Indicator
      style={(state) => {
        if (variant !== "line") {
          return [
            styles.indicatorDefault,
            {
              backgroundColor: isDark
                ? colors.labelQuaternary
                : colors.surfaceRaised,
            },
          ]
        }
        const position = state.activeTabPosition
        const size = state.activeTabSize
        if (!position || !size) return { backgroundColor: colors.label }
        return [
          { backgroundColor: colors.label },
          state.orientation === "vertical"
            ? { left: position.left + size.width + 2, width: 2 }
            : { top: position.top + size.height + 3, height: 2 },
        ]
      }}
      render={<Animated.View layout={INDICATOR_TRANSITION} />}
    />
  )
}

function TabsList({
  style,
  variant = "default",
  children,
  ...props
}: React.ComponentProps<typeof TabsPrimitive.List> & {
  variant?: TabsListVariant
}) {
  const { colors } = useTheme()
  return (
    <TabsListContext.Provider value={variant}>
      <TabsPrimitive.List
        style={(state) => [
          styles.list,
          variant === "line"
            ? styles.listLine
            : [styles.listDefault, { backgroundColor: colors.control }],
          state.orientation === "vertical" && styles.listVertical,
          typeof style === "function" ? style(state) : style,
        ]}
        {...props}
      >
        <TabsIndicator variant={variant} />
        {children}
      </TabsPrimitive.List>
    </TabsListContext.Provider>
  )
}

function TabsTrigger({
  style,
  disabled,
  ...props
}: React.ComponentProps<typeof TabsPrimitive.Tab>) {
  const { value, orientation } = TabsPrimitive.useRootContext()
  const { colors } = useTheme()
  const active = value === props.value
  return (
    <TextStyleContext.Provider
      value={{
        ...fontSize.sm,
        color: disabled
          ? colors.labelQuaternary
          : active
            ? colors.label
            : colors.labelSecondary,
      }}
    >
      <TabsPrimitive.Tab
        disabled={disabled}
        style={(state) => [
          styles.trigger,
          orientation === "vertical"
            ? styles.triggerVertical
            : styles.triggerHorizontal,
          typeof style === "function" ? style(state) : style,
        ]}
        {...props}
      />
    </TextStyleContext.Provider>
  )
}

function TabsContent({
  style,
  ...props
}: React.ComponentProps<typeof TabsPrimitive.Panel>) {
  return (
    <TabsPrimitive.Panel
      style={(state) => [
        styles.content,
        typeof style === "function" ? style(state) : style,
      ]}
      {...props}
    />
  )
}

export type { TabsListVariant }
export { Tabs, TabsContent, TabsList, TabsTrigger }
```

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/Components/Tabs.swift"
import SwiftUI

public struct Tabs<Content: View>: View {
  let selection: Binding<AnyHashable>
  let orientation: Axis
  let content: Content

  @Environment(\.accessibilityReduceMotion) private var reduceMotion

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

  public var body: some View {
    let binding = selection
    let animation: Animation? = reduceMotion ? nil : .timingCurve(0.32, 0.72, 0, 1, duration: 0.3)
    let context = TabsContext(
      selected: binding.wrappedValue,
      orientation: orientation,
      select: { value in
        withAnimation(animation) { binding.wrappedValue = value }
      }
    )
    Group {
      if orientation == .vertical {
        HStack(alignment: .top, spacing: 8) { content }
      } else {
        VStack(alignment: .leading, spacing: 8) { content }
      }
    }
    .environment(\.tabs, context)
  }
}

struct TabsContext: @unchecked Sendable {
  var selected: AnyHashable?
  var orientation: Axis = .horizontal
  var select: @MainActor @Sendable (AnyHashable) -> Void = { _ in }
}

extension EnvironmentValues {
  @Entry var tabs = TabsContext()
  @Entry var tabsListVariant: TabsListVariant = .default
  @Entry var tabsIndicator: Namespace.ID? = nil
}

public enum TabsListVariant: CaseIterable, Sendable {
  case `default`, line
}

public struct TabsList<Content: View>: View {
  public typealias Variant = TabsListVariant

  let variant: Variant
  let content: Content

  @Namespace private var namespace
  @Environment(\.tabs) private var tabs

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

  public var body: some View {
    let vertical = tabs.orientation == .vertical
    Group {
      if vertical {
        VStack(alignment: .leading, spacing: 4) { content }
          .fixedSize(horizontal: true, vertical: false)
      } else {
        HStack(spacing: 4) { content }
          .frame(height: variant == .line ? 32 : 36)
      }
    }
    .padding(variant == .line ? 2 : 4)
    .padding(variant == .line && !vertical ? .bottom : [], 5)
    .padding(variant == .line && vertical ? .trailing : [], 5)
    .background {
      if variant == .default {
        RoundedRectangle(cornerRadius: Radius.xl, style: .continuous).fill(Color.control)
      }
    }
    .environment(\.tabsListVariant, variant)
    .environment(\.tabsIndicator, namespace)
    .accessibilityElement(children: .contain)
  }
}

public struct TabsTrigger<Label: View>: View {
  let value: AnyHashable
  let label: Label

  @Environment(\.tabs) private var tabs
  @Environment(\.tabsListVariant) private var variant
  @Environment(\.tabsIndicator) private var namespace
  @Environment(\.isEnabled) private var isEnabled
  @Environment(\.colorScheme) private var colorScheme

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

  public var body: some View {
    let active = tabs.selected == value
    let vertical = tabs.orientation == .vertical
    Button {
      tabs.select(value)
    } label: {
      label
        .labelStyle(ButtonLabelStyle(spacing: 8, iconSize: 16))
        .font(TextStyle.sm.font())
        .tracking(TextStyle.sm.letterSpacing)
        .lineLimit(1)
        .foregroundStyle(!isEnabled ? Color.labelQuaternary : active ? .label : .labelSecondary)
        .padding(.horizontal, 12)
        .padding(.vertical, 4)
        .frame(maxWidth: vertical ? .infinity : nil, alignment: vertical ? .leading : .center)
        .frame(height: vertical ? 36 : nil)
        .frame(maxHeight: vertical ? nil : .infinity)
        .contentShape(Rectangle())
    }
    .buttonStyle(TabsTriggerStyle())
    .background(alignment: vertical ? .trailing : .bottom) {
      if active, let namespace {
        indicator
          .matchedGeometryEffect(id: "indicator", in: namespace)
      }
    }
    .accessibilityAddTraits(active ? .isSelected : [])
  }

  @ViewBuilder private var indicator: some View {
    let vertical = tabs.orientation == .vertical
    if variant == .line {
      Rectangle()
        .fill(Color.label)
        .frame(width: vertical ? 2 : nil, height: vertical ? nil : 2)
        .offset(x: vertical ? 4 : 0, y: vertical ? 0 : 5)
    } else {
      RoundedRectangle(cornerRadius: Radius.md, style: .continuous)
        .fill(colorScheme == .dark ? Color.labelQuaternary : .surfaceRaised)
        .shadow(color: .black.opacity(colorScheme == .dark ? 0 : 0.08), radius: 1.5, y: 1)
    }
  }
}

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

private struct TabsTriggerStyle: ButtonStyle {
  func makeBody(configuration: Configuration) -> some View {
    configuration.label
      .opacity(configuration.isPressed ? 0.7 : 1)
  }
}

public struct TabsContent<Content: View>: View {
  let value: AnyHashable
  let content: Content

  @Environment(\.tabs) private var tabs

  public init<Value: Hashable & Sendable>(value: Value, @ViewBuilder content: () -> Content) {
    self.value = AnyHashable(value)
    self.content = content()
  }

  public var body: some View {
    if tabs.selected == value {
      content
        .frame(maxWidth: .infinity, alignment: .topLeading)
    }
  }
}
```

```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/DropdownMenu.swift"
import PhosphorSwift
import SwiftUI

enum MenuPresentation: Sendable {
  case system, popup
}

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

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

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

  @State private var local = false

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

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

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

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

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

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

  @Environment(\.isEnabled) private var isEnabled

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

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

private struct MenuCheckmark: View {
  let visible: Bool

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

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

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

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

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

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

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

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

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

  @Environment(\.menuPresentation) private var presentation

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

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

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

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

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

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

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

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

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

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

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

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

  @Environment(\.menuPresentation) private var presentation

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

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

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

  @Environment(\.menuPresentation) private var presentation

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

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

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

  public init() {}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

public struct FieldTitle: View {
  let text: Text

  @Environment(\.isEnabled) private var isEnabled

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

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

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

public struct FieldDescription: View {
  let text: Text

  @Environment(\.fieldSetInset) private var inset

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

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

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

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

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

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

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

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

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

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

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

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

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

struct FieldSetInsetKey: PreferenceKey {
  static let defaultValue = false

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

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

  @State private var inset = false

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

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

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

  let text: Text
  let variant: Variant

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

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

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

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

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

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

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

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

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

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

extension EnvironmentValues {
  @Entry public var hapticsEnabled = true
}

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

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

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

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

  @Environment(\.hapticsEnabled) private var enabled

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

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

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

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

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

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

  @State private var count = 0

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  @State private var anchor = PopupAnchor()

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

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

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

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

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

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

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

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

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

  @Environment(\.colorScheme) private var colorScheme

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

struct OverlayCloseButton: View {
  let label: LocalizedStringKey?

  @Environment(\.overlayDismiss) private var dismiss

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

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

struct ReversedVStack: Layout {
  var spacing: CGFloat

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

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

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

  @Environment(\.overlayDismiss) private var dismiss

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  @Environment(\.select) private var select

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

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

public struct SelectLabel: View {
  let title: LocalizedStringKey

  @Environment(\.select) private var select

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

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

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

  public init() {}

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

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

public struct Separator: View {
  let orientation: Axis

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

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

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

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

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

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

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

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

private struct TextVariantModifier: ViewModifier {
  let variant: TextVariant

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

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

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

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

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

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

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

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

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

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

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

5. Add the files to your app target.

**Jetpack Compose**

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

```kotlin title="build.gradle.kts"
implementation(platform("androidx.compose:compose-bom:2026.09.00"))
implementation("androidx.compose.foundation:foundation")
implementation("androidx.compose.ui:ui")
```

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/components/Tabs.kt"
package com.esuiss.ui.components

import androidx.compose.animation.core.Animatable
import androidx.compose.animation.core.CubicBezierEasing
import androidx.compose.animation.core.tween
import androidx.compose.foundation.background
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.ColumnScope
import androidx.compose.foundation.layout.IntrinsicSize
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.RowScope
import androidx.compose.foundation.layout.fillMaxHeight
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.offset
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.layout.width
import androidx.compose.foundation.selection.selectable
import androidx.compose.foundation.selection.selectableGroup
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.LaunchedEffect
import androidx.compose.runtime.Stable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateMapOf
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.geometry.Rect
import androidx.compose.ui.layout.boundsInParent
import androidx.compose.ui.layout.onPlaced
import androidx.compose.ui.platform.LocalDensity
import androidx.compose.ui.semantics.Role
import androidx.compose.ui.unit.IntOffset
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Radius
import com.esuiss.ui.theme.Shadows
import com.esuiss.ui.theme.Typography
import com.esuiss.ui.theme.shadow
import kotlin.math.roundToInt
import kotlinx.coroutines.launch

enum class TabsListVariant { Default, Line }

private val IndicatorEasing = CubicBezierEasing(0.32f, 0.72f, 0f, 1f)

@Stable
private class TabsState(selected: String, onSelectedChange: (String) -> Unit) {
    var selected by mutableStateOf(selected)
    var onSelectedChange by mutableStateOf(onSelectedChange)
    val bounds = mutableStateMapOf<String, Rect>()
}

private val LocalTabs = staticCompositionLocalOf<TabsState?> { null }

private val LocalTabsVariant = staticCompositionLocalOf { TabsListVariant.Default }

@Composable
fun Tabs(
    selected: String,
    onSelectedChange: (String) -> Unit,
    modifier: Modifier = Modifier,
    content: @Composable ColumnScope.() -> Unit,
) {
    val state = remember { TabsState(selected, onSelectedChange) }
    state.selected = selected
    state.onSelectedChange = onSelectedChange
    CompositionLocalProvider(LocalTabs provides state) {
        Column(modifier = modifier, verticalArrangement = Arrangement.spacedBy(8.dp), content = content)
    }
}

@Composable
fun TabsList(
    modifier: Modifier = Modifier,
    variant: TabsListVariant = TabsListVariant.Default,
    content: @Composable RowScope.() -> Unit,
) {
    val state = LocalTabs.current ?: error("TabsList must be used within Tabs.")
    val colors = EsuissTheme.colors
    val line = variant == TabsListVariant.Line
    val listShape = RoundedCornerShape(Radius.xl)
    Box(
        modifier = modifier
            .width(IntrinsicSize.Max)
            .height(if (line) 41.dp else 44.dp)
            .then(if (line) Modifier else Modifier.background(colors.control, listShape))
            .padding(if (line) 2.dp else 4.dp)
            .then(if (line) Modifier.padding(bottom = 5.dp) else Modifier),
    ) {
        TabsIndicator(state, variant)
        CompositionLocalProvider(LocalTabsVariant provides variant) {
            Row(
                modifier = Modifier.fillMaxWidth().fillMaxHeight().selectableGroup(),
                horizontalArrangement = Arrangement.spacedBy(4.dp),
                verticalAlignment = Alignment.CenterVertically,
                content = content,
            )
        }
    }
}

@Composable
private fun TabsIndicator(state: TabsState, variant: TabsListVariant) {
    val colors = EsuissTheme.colors
    val density = LocalDensity.current
    val target = state.bounds[state.selected] ?: return
    val left = remember { Animatable(target.left) }
    val width = remember { Animatable(target.width) }
    LaunchedEffect(target) {
        val spec = tween<Float>(300, easing = IndicatorEasing)
        launch { left.animateTo(target.left, spec) }
        launch { width.animateTo(target.width, spec) }
    }
    val shape = RoundedCornerShape(Radius.md)
    if (variant == TabsListVariant.Line) {
        Box(
            modifier = Modifier
                .offset { IntOffset(left.value.roundToInt(), (target.bottom + with(density) { 3.dp.toPx() }).roundToInt()) }
                .size(with(density) { width.value.toDp() }, 2.dp)
                .background(colors.label),
        )
    } else {
        Box(
            modifier = Modifier
                .offset { IntOffset(left.value.roundToInt(), target.top.roundToInt()) }
                .size(with(density) { width.value.toDp() }, with(density) { target.height.toDp() })
                .shadow(Shadows.md, shape)
                .background(if (colors.isDark) colors.labelQuaternary else colors.surfaceRaised, shape),
        )
    }
}

@Composable
fun RowScope.TabsTrigger(
    value: String,
    text: String,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
) {
    TabsTrigger(value, modifier, enabled) {
        BasicText(text, style = LocalContentStyle.current, maxLines = 1)
    }
}

@Composable
fun RowScope.TabsTrigger(
    value: String,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    content: @Composable RowScope.() -> Unit,
) {
    val state = LocalTabs.current ?: error("TabsTrigger must be used within Tabs.")
    val colors = EsuissTheme.colors
    val active = state.selected == value
    val foreground = when {
        !enabled -> colors.labelQuaternary
        active -> colors.label
        else -> colors.labelSecondary
    }
    Row(
        modifier = modifier
            .weight(1f)
            .fillMaxHeight()
            .onPlaced { state.bounds[value] = it.boundsInParent() }
            .selectable(
                selected = active,
                enabled = enabled,
                role = Role.Tab,
                interactionSource = remember { MutableInteractionSource() },
                indication = null,
                onClick = { state.onSelectedChange(value) },
            )
            .padding(horizontal = 12.dp, vertical = 4.dp),
        horizontalArrangement = Arrangement.spacedBy(8.dp, Alignment.CenterHorizontally),
        verticalAlignment = Alignment.CenterVertically,
    ) {
        CompositionLocalProvider(
            LocalContentStyle provides Typography.sm.copy(color = foreground),
            LocalContentColor provides foreground,
            LocalIconSize provides 16.dp,
        ) {
            content()
        }
    }
}

@Composable
fun TabsContent(
    value: String,
    modifier: Modifier = Modifier,
    content: @Composable ColumnScope.() -> Unit,
) {
    val state = LocalTabs.current ?: error("TabsContent must be used within Tabs.")
    if (state.selected != value) return
    Column(modifier = modifier, content = content)
}
```

```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 }
```

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

## Usage

```tsx
import { Tabs, TabsList, TabsTrigger, TabsContent } from "@/components/ui/tabs"
```

```tsx
<TabsDemo />
```

Give each `TabsTrigger` and its `TabsContent` the same `value`. Use `defaultValue` for an uncontrolled tab set, or `value` with `onValueChange` to control it.

Set `orientation="vertical"` on `Tabs` to stack the list beside the panels. Put an `Icon` next to the `Text` in a trigger for icon tabs.

Inactive panels are unmounted unless you set `keepMounted` on `TabsContent`. `tabsListVariants` is exported for reuse.

## Examples

### With icons

Tabs with an icon beside each label.

![Preview](https://uim.suiss.app/previews/components-tabs--with-icons.light.webp)

```tsx
import { GearIcon, UserIcon } from "phosphor-react-native"
import * as React from "react"
import { Icon } from "@/components/ui/icon"
import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs"
import { Text } from "@/components/ui/text"

type ListVariant = "default" | "line"

function WithIconsDemo({ variant }: { variant?: ListVariant }) {
  const [value, setValue] = React.useState("profile")
  return (
    <Tabs value={value} onValueChange={setValue}>
      <TabsList variant={variant}>
        <TabsTrigger value="profile">
          <Icon as={UserIcon} className="size-4" />
          <Text>Profile</Text>
        </TabsTrigger>
        <TabsTrigger value="settings">
          <Icon as={GearIcon} className="size-4" />
          <Text>Settings</Text>
        </TabsTrigger>
      </TabsList>
      <TabsContent value="profile">
        <Text className="text-sm text-label-secondary">
          Your public profile information.
        </Text>
      </TabsContent>
      <TabsContent value="settings">
        <Text className="text-sm text-label-secondary">
          Manage your preferences.
        </Text>
      </TabsContent>
    </Tabs>
  )
}

export function TabsWithIconsExample() {
  return (
    <WithIconsDemo />
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct TabsPanelText: View {
  let text: LocalizedStringKey

  var body: some View {
    Text(text)
      .textStyle(.sm)
      .foregroundStyle(Color.labelSecondary)
  }
}

struct TabsWithIconsDemo: View {
  var variant: TabsListVariant = .default

  @State private var value = "profile"

  var body: some View {
    Tabs(selection: $value) {
      TabsList(variant: variant) {
        TabsTrigger(value: "profile") {
          Label {
            Text("Profile")
          } icon: {
            Ph.user.regular
          }
        }
        TabsTrigger(value: "settings") {
          Label {
            Text("Settings")
          } icon: {
            Ph.gear.regular
          }
        }
      }
      TabsContent(value: "profile") {
        TabsPanelText(text: "Your public profile information.")
      }
      TabsContent(value: "settings") {
        TabsPanelText(text: "Manage your preferences.")
      }
    }
    .frame(maxWidth: .infinity)
  }
}
```

```kotlin
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.Gear
import com.adamglin.phosphoricons.regular.User
import com.esuiss.ui.components.Icon
import com.esuiss.ui.components.Tabs
import com.esuiss.ui.components.TabsContent
import com.esuiss.ui.components.TabsList
import com.esuiss.ui.components.TabsListVariant
import com.esuiss.ui.components.TabsTrigger
import com.esuiss.ui.components.Text
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography

@Composable
fun TabsWithIconsExample() {
    TabsWithIcons(TabsListVariant.Default)
}

@Composable
fun TabsSecondaryText(text: String) {
    Text(text, style = Typography.sm, color = EsuissTheme.colors.labelSecondary)
}

@Composable
fun TabsWithIcons(variant: TabsListVariant) {
    var value by rememberSaveable { mutableStateOf("profile") }
    Tabs(value, { value = it }) {
        TabsList(variant = variant) {
            TabsTrigger("profile") {
                Icon(PhosphorIcons.Regular.User, contentDescription = null, size = 16.dp)
                Text("Profile")
            }
            TabsTrigger("settings") {
                Icon(PhosphorIcons.Regular.Gear, contentDescription = null, size = 16.dp)
                Text("Settings")
            }
        }
        TabsContent("profile") { TabsSecondaryText("Your public profile information.") }
        TabsContent("settings") { TabsSecondaryText("Manage your preferences.") }
    }
}
```

### Disabled tab

A tab set with one disabled tab.

![Preview](https://uim.suiss.app/previews/components-tabs--disabled-tab.light.webp)

```tsx
import * as React from "react"
import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs"
import { Text } from "@/components/ui/text"

type ListVariant = "default" | "line"

function DisabledTabDemo({ variant }: { variant?: ListVariant }) {
  const [value, setValue] = React.useState("overview")
  return (
    <Tabs value={value} onValueChange={setValue}>
      <TabsList variant={variant}>
        <TabsTrigger value="overview">
          <Text>Overview</Text>
        </TabsTrigger>
        <TabsTrigger value="analytics">
          <Text>Analytics</Text>
        </TabsTrigger>
        <TabsTrigger value="reports" disabled>
          <Text>Reports</Text>
        </TabsTrigger>
      </TabsList>
      <TabsContent value="overview">
        <Text className="text-sm text-label-secondary">
          A summary of your activity.
        </Text>
      </TabsContent>
      <TabsContent value="analytics">
        <Text className="text-sm text-label-secondary">
          Detailed metrics and trends.
        </Text>
      </TabsContent>
    </Tabs>
  )
}

export function TabsDisabledTabExample() {
  return (
    <DisabledTabDemo />
  )
}
```

```swift
import EsuissUI
import SwiftUI

struct TabsPanelText: View {
  let text: LocalizedStringKey

  var body: some View {
    Text(text)
      .textStyle(.sm)
      .foregroundStyle(Color.labelSecondary)
  }
}

struct TabsDisabledDemo: View {
  var variant: TabsListVariant = .default

  @State private var value = "overview"

  var body: some View {
    Tabs(selection: $value) {
      TabsList(variant: variant) {
        TabsTrigger("Overview", value: "overview")
        TabsTrigger("Analytics", value: "analytics")
        TabsTrigger("Reports", value: "reports")
          .disabled(true)
      }
      TabsContent(value: "overview") {
        TabsPanelText(text: "A summary of your activity.")
      }
      TabsContent(value: "analytics") {
        TabsPanelText(text: "Detailed metrics and trends.")
      }
    }
    .frame(maxWidth: .infinity)
  }
}
```

```kotlin
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import com.esuiss.ui.components.Tabs
import com.esuiss.ui.components.TabsContent
import com.esuiss.ui.components.TabsList
import com.esuiss.ui.components.TabsListVariant
import com.esuiss.ui.components.TabsTrigger
import com.esuiss.ui.components.Text
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography

@Composable
fun TabsDisabledTabExample() {
    TabsDisabledTab(TabsListVariant.Default)
}

@Composable
fun TabsSecondaryText(text: String) {
    Text(text, style = Typography.sm, color = EsuissTheme.colors.labelSecondary)
}

@Composable
fun TabsDisabledTab(variant: TabsListVariant) {
    var value by rememberSaveable { mutableStateOf("overview") }
    Tabs(value, { value = it }) {
        TabsList(variant = variant) {
            TabsTrigger("overview", "Overview")
            TabsTrigger("analytics", "Analytics")
            TabsTrigger("reports", "Reports", enabled = false)
        }
        TabsContent("overview") { TabsSecondaryText("A summary of your activity.") }
        TabsContent("analytics") { TabsSecondaryText("Detailed metrics and trends.") }
    }
}
```

### Line

The `line` variant with an underline indicator.

![Preview](https://uim.suiss.app/previews/components-tabs--line.light.webp)

```tsx
import * as React from "react"
import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs"
import { Text } from "@/components/ui/text"

type ListVariant = "default" | "line"

function SectionsDemo({
  variant,
  orientation,
}: {
  variant?: ListVariant
  orientation?: "horizontal" | "vertical"
}) {
  const [value, setValue] = React.useState("overview")
  return (
    <Tabs value={value} onValueChange={setValue} orientation={orientation}>
      <TabsList variant={variant}>
        <TabsTrigger value="overview">
          <Text>Overview</Text>
        </TabsTrigger>
        <TabsTrigger value="analytics">
          <Text>Analytics</Text>
        </TabsTrigger>
        <TabsTrigger value="reports">
          <Text>Reports</Text>
        </TabsTrigger>
      </TabsList>
      <TabsContent value="overview">
        <Text className="text-sm text-label-secondary">
          A summary of your activity.
        </Text>
      </TabsContent>
      <TabsContent value="analytics">
        <Text className="text-sm text-label-secondary">
          Detailed metrics and trends.
        </Text>
      </TabsContent>
      <TabsContent value="reports">
        <Text className="text-sm text-label-secondary">
          Exported reports and schedules.
        </Text>
      </TabsContent>
    </Tabs>
  )
}

export function TabsLineExample() {
  return (
    <SectionsDemo variant="line" />
  )
}
```

```swift
import EsuissUI
import SwiftUI

struct TabsLineExample: View {
  var body: some View {
    TabsSectionsDemo(variant: .line)
  }
}

struct TabsPanelText: View {
  let text: LocalizedStringKey

  var body: some View {
    Text(text)
      .textStyle(.sm)
      .foregroundStyle(Color.labelSecondary)
  }
}

struct TabsSectionsDemo: View {
  var variant: TabsListVariant = .default
  var orientation: Axis = .horizontal

  @State private var value = "overview"

  var body: some View {
    Tabs(selection: $value, orientation: orientation) {
      TabsList(variant: variant) {
        TabsTrigger("Overview", value: "overview")
        TabsTrigger("Analytics", value: "analytics")
        TabsTrigger("Reports", value: "reports")
      }
      TabsContent(value: "overview") {
        TabsPanelText(text: "A summary of your activity.")
      }
      TabsContent(value: "analytics") {
        TabsPanelText(text: "Detailed metrics and trends.")
      }
      TabsContent(value: "reports") {
        TabsPanelText(text: "Exported reports and schedules.")
      }
    }
    .frame(maxWidth: .infinity)
  }
}
```

```kotlin
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import com.esuiss.ui.components.Tabs
import com.esuiss.ui.components.TabsContent
import com.esuiss.ui.components.TabsList
import com.esuiss.ui.components.TabsListVariant
import com.esuiss.ui.components.TabsTrigger
import com.esuiss.ui.components.Text
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography

@Composable
fun TabsLineExample() {
    TabsSections(TabsListVariant.Line)
}

@Composable
fun TabsSecondaryText(text: String) {
    Text(text, style = Typography.sm, color = EsuissTheme.colors.labelSecondary)
}

@Composable
fun TabsSections(variant: TabsListVariant) {
    var value by rememberSaveable { mutableStateOf("overview") }
    Tabs(value, { value = it }) {
        TabsList(variant = variant) {
            TabsTrigger("overview", "Overview")
            TabsTrigger("analytics", "Analytics")
            TabsTrigger("reports", "Reports")
        }
        TabsContent("overview") { TabsSecondaryText("A summary of your activity.") }
        TabsContent("analytics") { TabsSecondaryText("Detailed metrics and trends.") }
        TabsContent("reports") { TabsSecondaryText("Exported reports and schedules.") }
    }
}
```

### Vertical

A vertical tab list next to its panels.

![Preview](https://uim.suiss.app/previews/components-tabs--vertical.light.webp)

```tsx
import * as React from "react"
import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs"
import { Text } from "@/components/ui/text"

type ListVariant = "default" | "line"

function SectionsDemo({
  variant,
  orientation,
}: {
  variant?: ListVariant
  orientation?: "horizontal" | "vertical"
}) {
  const [value, setValue] = React.useState("overview")
  return (
    <Tabs value={value} onValueChange={setValue} orientation={orientation}>
      <TabsList variant={variant}>
        <TabsTrigger value="overview">
          <Text>Overview</Text>
        </TabsTrigger>
        <TabsTrigger value="analytics">
          <Text>Analytics</Text>
        </TabsTrigger>
        <TabsTrigger value="reports">
          <Text>Reports</Text>
        </TabsTrigger>
      </TabsList>
      <TabsContent value="overview">
        <Text className="text-sm text-label-secondary">
          A summary of your activity.
        </Text>
      </TabsContent>
      <TabsContent value="analytics">
        <Text className="text-sm text-label-secondary">
          Detailed metrics and trends.
        </Text>
      </TabsContent>
      <TabsContent value="reports">
        <Text className="text-sm text-label-secondary">
          Exported reports and schedules.
        </Text>
      </TabsContent>
    </Tabs>
  )
}

export function TabsVerticalExample() {
  return (
    <SectionsDemo orientation="vertical" />
  )
}
```

```swift
import EsuissUI
import SwiftUI

struct TabsVerticalExample: View {
  var body: some View {
    TabsSectionsDemo(orientation: .vertical)
  }
}

struct TabsPanelText: View {
  let text: LocalizedStringKey

  var body: some View {
    Text(text)
      .textStyle(.sm)
      .foregroundStyle(Color.labelSecondary)
  }
}

struct TabsSectionsDemo: View {
  var variant: TabsListVariant = .default
  var orientation: Axis = .horizontal

  @State private var value = "overview"

  var body: some View {
    Tabs(selection: $value, orientation: orientation) {
      TabsList(variant: variant) {
        TabsTrigger("Overview", value: "overview")
        TabsTrigger("Analytics", value: "analytics")
        TabsTrigger("Reports", value: "reports")
      }
      TabsContent(value: "overview") {
        TabsPanelText(text: "A summary of your activity.")
      }
      TabsContent(value: "analytics") {
        TabsPanelText(text: "Detailed metrics and trends.")
      }
      TabsContent(value: "reports") {
        TabsPanelText(text: "Exported reports and schedules.")
      }
    }
    .frame(maxWidth: .infinity)
  }
}
```

### Vertical line

A vertical `line` list with a side indicator.

![Preview](https://uim.suiss.app/previews/components-tabs--vertical-line.light.webp)

```tsx
import * as React from "react"
import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs"
import { Text } from "@/components/ui/text"

type ListVariant = "default" | "line"

function SectionsDemo({
  variant,
  orientation,
}: {
  variant?: ListVariant
  orientation?: "horizontal" | "vertical"
}) {
  const [value, setValue] = React.useState("overview")
  return (
    <Tabs value={value} onValueChange={setValue} orientation={orientation}>
      <TabsList variant={variant}>
        <TabsTrigger value="overview">
          <Text>Overview</Text>
        </TabsTrigger>
        <TabsTrigger value="analytics">
          <Text>Analytics</Text>
        </TabsTrigger>
        <TabsTrigger value="reports">
          <Text>Reports</Text>
        </TabsTrigger>
      </TabsList>
      <TabsContent value="overview">
        <Text className="text-sm text-label-secondary">
          A summary of your activity.
        </Text>
      </TabsContent>
      <TabsContent value="analytics">
        <Text className="text-sm text-label-secondary">
          Detailed metrics and trends.
        </Text>
      </TabsContent>
      <TabsContent value="reports">
        <Text className="text-sm text-label-secondary">
          Exported reports and schedules.
        </Text>
      </TabsContent>
    </Tabs>
  )
}

export function TabsVerticalLineExample() {
  return (
    <SectionsDemo variant="line" orientation="vertical" />
  )
}
```

```swift
import EsuissUI
import SwiftUI

struct TabsVerticalLineExample: View {
  var body: some View {
    TabsSectionsDemo(variant: .line, orientation: .vertical)
  }
}

struct TabsPanelText: View {
  let text: LocalizedStringKey

  var body: some View {
    Text(text)
      .textStyle(.sm)
      .foregroundStyle(Color.labelSecondary)
  }
}

struct TabsSectionsDemo: View {
  var variant: TabsListVariant = .default
  var orientation: Axis = .horizontal

  @State private var value = "overview"

  var body: some View {
    Tabs(selection: $value, orientation: orientation) {
      TabsList(variant: variant) {
        TabsTrigger("Overview", value: "overview")
        TabsTrigger("Analytics", value: "analytics")
        TabsTrigger("Reports", value: "reports")
      }
      TabsContent(value: "overview") {
        TabsPanelText(text: "A summary of your activity.")
      }
      TabsContent(value: "analytics") {
        TabsPanelText(text: "Detailed metrics and trends.")
      }
      TabsContent(value: "reports") {
        TabsPanelText(text: "Exported reports and schedules.")
      }
    }
    .frame(maxWidth: .infinity)
  }
}
```

### With icons line

Icon tabs in the `line` variant.

![Preview](https://uim.suiss.app/previews/components-tabs--with-icons-line.light.webp)

```tsx
import { GearIcon, UserIcon } from "phosphor-react-native"
import * as React from "react"
import { Icon } from "@/components/ui/icon"
import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs"
import { Text } from "@/components/ui/text"

type ListVariant = "default" | "line"

function WithIconsDemo({ variant }: { variant?: ListVariant }) {
  const [value, setValue] = React.useState("profile")
  return (
    <Tabs value={value} onValueChange={setValue}>
      <TabsList variant={variant}>
        <TabsTrigger value="profile">
          <Icon as={UserIcon} className="size-4" />
          <Text>Profile</Text>
        </TabsTrigger>
        <TabsTrigger value="settings">
          <Icon as={GearIcon} className="size-4" />
          <Text>Settings</Text>
        </TabsTrigger>
      </TabsList>
      <TabsContent value="profile">
        <Text className="text-sm text-label-secondary">
          Your public profile information.
        </Text>
      </TabsContent>
      <TabsContent value="settings">
        <Text className="text-sm text-label-secondary">
          Manage your preferences.
        </Text>
      </TabsContent>
    </Tabs>
  )
}

export function TabsWithIconsLineExample() {
  return (
    <WithIconsDemo variant="line" />
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct TabsWithIconsLineExample: View {
  var body: some View {
    TabsWithIconsDemo(variant: .line)
  }
}

struct TabsPanelText: View {
  let text: LocalizedStringKey

  var body: some View {
    Text(text)
      .textStyle(.sm)
      .foregroundStyle(Color.labelSecondary)
  }
}

struct TabsWithIconsDemo: View {
  var variant: TabsListVariant = .default

  @State private var value = "profile"

  var body: some View {
    Tabs(selection: $value) {
      TabsList(variant: variant) {
        TabsTrigger(value: "profile") {
          Label {
            Text("Profile")
          } icon: {
            Ph.user.regular
          }
        }
        TabsTrigger(value: "settings") {
          Label {
            Text("Settings")
          } icon: {
            Ph.gear.regular
          }
        }
      }
      TabsContent(value: "profile") {
        TabsPanelText(text: "Your public profile information.")
      }
      TabsContent(value: "settings") {
        TabsPanelText(text: "Manage your preferences.")
      }
    }
    .frame(maxWidth: .infinity)
  }
}
```

```kotlin
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.Gear
import com.adamglin.phosphoricons.regular.User
import com.esuiss.ui.components.Icon
import com.esuiss.ui.components.Tabs
import com.esuiss.ui.components.TabsContent
import com.esuiss.ui.components.TabsList
import com.esuiss.ui.components.TabsListVariant
import com.esuiss.ui.components.TabsTrigger
import com.esuiss.ui.components.Text
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography

@Composable
fun TabsWithIconsLineExample() {
    TabsWithIcons(TabsListVariant.Line)
}

@Composable
fun TabsSecondaryText(text: String) {
    Text(text, style = Typography.sm, color = EsuissTheme.colors.labelSecondary)
}

@Composable
fun TabsWithIcons(variant: TabsListVariant) {
    var value by rememberSaveable { mutableStateOf("profile") }
    Tabs(value, { value = it }) {
        TabsList(variant = variant) {
            TabsTrigger("profile") {
                Icon(PhosphorIcons.Regular.User, contentDescription = null, size = 16.dp)
                Text("Profile")
            }
            TabsTrigger("settings") {
                Icon(PhosphorIcons.Regular.Gear, contentDescription = null, size = 16.dp)
                Text("Settings")
            }
        }
        TabsContent("profile") { TabsSecondaryText("Your public profile information.") }
        TabsContent("settings") { TabsSecondaryText("Manage your preferences.") }
    }
}
```

### Disabled tab line

A disabled tab in the `line` variant.

![Preview](https://uim.suiss.app/previews/components-tabs--disabled-tab-line.light.webp)

```tsx
import * as React from "react"
import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs"
import { Text } from "@/components/ui/text"

type ListVariant = "default" | "line"

function DisabledTabDemo({ variant }: { variant?: ListVariant }) {
  const [value, setValue] = React.useState("overview")
  return (
    <Tabs value={value} onValueChange={setValue}>
      <TabsList variant={variant}>
        <TabsTrigger value="overview">
          <Text>Overview</Text>
        </TabsTrigger>
        <TabsTrigger value="analytics">
          <Text>Analytics</Text>
        </TabsTrigger>
        <TabsTrigger value="reports" disabled>
          <Text>Reports</Text>
        </TabsTrigger>
      </TabsList>
      <TabsContent value="overview">
        <Text className="text-sm text-label-secondary">
          A summary of your activity.
        </Text>
      </TabsContent>
      <TabsContent value="analytics">
        <Text className="text-sm text-label-secondary">
          Detailed metrics and trends.
        </Text>
      </TabsContent>
    </Tabs>
  )
}

export function TabsDisabledTabLineExample() {
  return (
    <DisabledTabDemo variant="line" />
  )
}
```

```swift
import EsuissUI
import SwiftUI

struct TabsDisabledTabLineExample: View {
  var body: some View {
    TabsDisabledDemo(variant: .line)
  }
}

struct TabsPanelText: View {
  let text: LocalizedStringKey

  var body: some View {
    Text(text)
      .textStyle(.sm)
      .foregroundStyle(Color.labelSecondary)
  }
}

struct TabsDisabledDemo: View {
  var variant: TabsListVariant = .default

  @State private var value = "overview"

  var body: some View {
    Tabs(selection: $value) {
      TabsList(variant: variant) {
        TabsTrigger("Overview", value: "overview")
        TabsTrigger("Analytics", value: "analytics")
        TabsTrigger("Reports", value: "reports")
          .disabled(true)
      }
      TabsContent(value: "overview") {
        TabsPanelText(text: "A summary of your activity.")
      }
      TabsContent(value: "analytics") {
        TabsPanelText(text: "Detailed metrics and trends.")
      }
    }
    .frame(maxWidth: .infinity)
  }
}
```

```kotlin
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import com.esuiss.ui.components.Tabs
import com.esuiss.ui.components.TabsContent
import com.esuiss.ui.components.TabsList
import com.esuiss.ui.components.TabsListVariant
import com.esuiss.ui.components.TabsTrigger
import com.esuiss.ui.components.Text
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography

@Composable
fun TabsDisabledTabLineExample() {
    TabsDisabledTab(TabsListVariant.Line)
}

@Composable
fun TabsSecondaryText(text: String) {
    Text(text, style = Typography.sm, color = EsuissTheme.colors.labelSecondary)
}

@Composable
fun TabsDisabledTab(variant: TabsListVariant) {
    var value by rememberSaveable { mutableStateOf("overview") }
    Tabs(value, { value = it }) {
        TabsList(variant = variant) {
            TabsTrigger("overview", "Overview")
            TabsTrigger("analytics", "Analytics")
            TabsTrigger("reports", "Reports", enabled = false)
        }
        TabsContent("overview") { TabsSecondaryText("A summary of your activity.") }
        TabsContent("analytics") { TabsSecondaryText("Detailed metrics and trends.") }
    }
}
```

## API Reference

### Tabs

Root that holds the active value and orientation.

### TabsList

Row or column of triggers with the animated indicator.

### TabsTrigger

Pressable tab that activates its panel.

### TabsContent

Panel shown when its value is active.

## Accessibility

- `TabsList` has the `tablist` role and each trigger has the `tab` role.
- Triggers report `selected` and `disabled` in their accessibility state, so VoiceOver and TalkBack announce the current tab.
- Hidden panels kept with `keepMounted` are removed from the accessibility tree.
- The indicator animation follows the system reduce motion setting.

## Notes

- The `default` track uses `bg-control` with a `bg-surface-raised` indicator (`bg-label-quaternary` in dark mode); the `line` indicator uses `bg-label`.
- Labels use `text-label` when active, `text-label-secondary` when inactive and `text-label-quaternary` when disabled.
- Light and dark colors follow the system appearance.