# Sheet

A panel that slides in from any edge of the screen, for secondary content and settings.

Sheet 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/sheet

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

```tsx
import { View } from "react-native"
import { Button } from "@/components/ui/button"
import { Input } from "@/components/ui/input"
import { Label } from "@/components/ui/label"
import { Sheet, SheetClose, SheetContent, SheetDescription, SheetFooter, SheetHeader, SheetTitle, SheetTrigger } from "@/components/ui/sheet"
import { Text } from "@/components/ui/text"

type Side = "top" | "right" | "bottom" | "left"

function ProfileContent({ side }: { side?: Side }) {
  return (
    <SheetContent side={side}>
      <SheetHeader>
        <SheetTitle>Edit profile</SheetTitle>
        <SheetDescription>
          Make changes to your profile here. Tap save when you&apos;re done.
        </SheetDescription>
      </SheetHeader>
      <View className="gap-4 px-6">
        <View className="gap-2">
          <Label nativeID="sheet-name">Name</Label>
          <Input
            accessibilityLabelledBy="sheet-name"
            defaultValue="Pedro Duarte"
          />
        </View>
        <View className="gap-2">
          <Label nativeID="sheet-username">Username</Label>
          <Input
            accessibilityLabelledBy="sheet-username"
            defaultValue="@peduarte"
            autoCapitalize="none"
          />
        </View>
      </View>
      <SheetFooter>
        <Button>
          <Text>Save changes</Text>
        </Button>
        <SheetClose render={<Button variant="secondary" />}>
          <Text>Close</Text>
        </SheetClose>
      </SheetFooter>
    </SheetContent>
  )
}

export function SheetOpenByDefaultExample() {
  return (
    <View className="items-start">
      <Sheet defaultOpen>
        <SheetTrigger render={<Button variant="outline" />}>
          <Text>Open</Text>
        </SheetTrigger>
        <ProfileContent />
      </Sheet>
    </View>
  )
}
```

```swift
import EsuissUI
import SwiftUI

struct SheetOpenByDefaultExample: View {
  var body: some View {
    ProfileSheet(title: "Open", side: .trailing, open: true)
  }
}

struct ProfileSheet: View {
  let title: LocalizedStringKey
  let side: Edge

  @State private var open: Bool

  init(title: LocalizedStringKey, side: Edge, open: Bool = false) {
    self.title = title
    self.side = side
    _open = State(initialValue: open)
  }

  var body: some View {
    Button(title) { open = true }
      .buttonStyle(.variant(.outline))
      .sheet(isPresented: $open, side: side) {
        ProfileContent()
      }
  }
}

struct ProfileContent: View {
  @State private var name = "Pedro Duarte"
  @State private var username = "@peduarte"

  var body: some View {
    SheetContent {
      SheetHeader {
        SheetTitle("Edit profile")
        SheetDescription("Make changes to your profile here. Tap save when you're done.")
      }
      VStack(alignment: .leading, spacing: 16) {
        VStack(alignment: .leading, spacing: 8) {
          FieldLabel("Name")
            .accessibilityHidden(true)
          TextField("Name", text: $name)
            .textFieldStyle(.input)
        }
        VStack(alignment: .leading, spacing: 8) {
          FieldLabel("Username")
            .accessibilityHidden(true)
          TextField("Username", text: $username)
            .textFieldStyle(.input)
            .textInputAutocapitalization(.never)
        }
      }
      .padding(.horizontal, 24)
      SheetFooter {
        Button {} label: {
          Text("Save changes").frame(maxWidth: .infinity)
        }
        .buttonStyle(.variant())
        SheetClose {
          Text("Close").frame(maxWidth: .infinity)
        }
        .buttonStyle(.variant(.secondary))
      }
    }
  }
}
```

```kotlin
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
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.unit.dp
import com.esuiss.ui.components.Button
import com.esuiss.ui.components.ButtonVariant
import com.esuiss.ui.components.Input
import com.esuiss.ui.components.Label
import com.esuiss.ui.components.Sheet
import com.esuiss.ui.components.SheetDescription
import com.esuiss.ui.components.SheetFooter
import com.esuiss.ui.components.SheetHeader
import com.esuiss.ui.components.SheetSide
import com.esuiss.ui.components.SheetTitle

@Composable
fun SheetOpenByDefaultExample() {
    SheetDefault(defaultOpen = true)
}

@Composable
fun ProfileSheet(open: Boolean, onOpenChange: (Boolean) -> Unit, side: SheetSide = SheetSide.Right) {
    var name by rememberSaveable { mutableStateOf("Pedro Duarte") }
    var username by rememberSaveable { mutableStateOf("@peduarte") }
    Sheet(open = open, onOpenChange = onOpenChange, side = side) {
        SheetHeader {
            SheetTitle("Edit profile")
            SheetDescription("Make changes to your profile here. Tap save when you're done.")
        }
        Column(Modifier.padding(horizontal = 24.dp), verticalArrangement = Arrangement.spacedBy(16.dp)) {
            Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
                Label("Name")
                Input(name, { name = it }, Modifier.semantics { contentDescription = "Name" })
            }
            Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
                Label("Username")
                Input(
                    username,
                    { username = it },
                    Modifier.semantics { contentDescription = "Username" },
                    keyboardOptions = KeyboardOptions(capitalization = KeyboardCapitalization.None, autoCorrectEnabled = false),
                )
            }
        }
        SheetFooter {
            Button("Save changes", onClick = {}, modifier = Modifier.fillMaxWidth())
            Button("Close", onClick = { onOpenChange(false) }, modifier = Modifier.fillMaxWidth(), variant = ButtonVariant.Secondary)
        }
    }
}

@Composable
fun SheetDefault(defaultOpen: Boolean) {
    var open by rememberSaveable { mutableStateOf(defaultOpen) }
    Column {
        Button("Open", onClick = { open = true }, variant = ButtonVariant.Outline)
        ProfileSheet(open, { open = it })
    }
}
```

`Sheet` is built on the drawer primitive. `SheetContent` renders in a portal, above a dimmed overlay, as a rounded floating panel inset from the screen edges and the safe area. It enters and exits with a Reanimated fade-and-slide from its `side` and can be dismissed by swiping toward that edge.

Use `right` or `left` for navigation and detail panels that span the screen height, and `top` or `bottom` for short panels that span the width. For snap points and a drag handle, use Drawer instead.

## Installation

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

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

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

The CLI also adds what it builds on: [Button](/docs/components/button), [Icon](/docs/components/icon), [Text](/docs/components/text).

### Manual

**Uniwind**

1. Install the dependencies:

```bash title="Terminal"
npx expo install cn phosphor-react-native react-native-reanimated react-native-safe-area-context react-native-screens react-native-svg react-native-worklets
```

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

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

```tsx title="uniwind/components/ui/sheet.tsx"
import { cn } from "cn"
import { XIcon } from "phosphor-react-native"
import * as React from "react"
import { Platform, View, type ViewProps, type ViewStyle } from "react-native"
import {
  FadeIn,
  FadeInDown,
  FadeInLeft,
  FadeInRight,
  FadeInUp,
  FadeOut,
  FadeOutDown,
  FadeOutLeft,
  FadeOutRight,
  FadeOutUp,
  ReduceMotion,
} from "react-native-reanimated"
import { useSafeAreaInsets } from "react-native-safe-area-context"
import { FullWindowOverlay as RNFullWindowOverlay } from "react-native-screens"
import * as DrawerPrimitive from "@/components/primitives/drawer"
import { resolveClassName } from "@/components/primitives/use-render"
import { AnimatedView } from "@/components/ui/animated-view"
import { Button } from "@/components/ui/button"
import { Icon } from "@/components/ui/icon"
import { Text } from "@/components/ui/text"

type SheetSide = "top" | "right" | "bottom" | "left"

const SWIPE_DIRECTION: Record<SheetSide, DrawerPrimitive.SwipeDirection> = {
  top: "up",
  right: "right",
  bottom: "down",
  left: "left",
}

const ENTERING = {
  top: FadeInUp,
  right: FadeInRight,
  bottom: FadeInDown,
  left: FadeInLeft,
} as const

const EXITING = {
  top: FadeOutUp,
  right: FadeOutRight,
  bottom: FadeOutDown,
  left: FadeOutLeft,
} as const

const POSITION: Record<SheetSide, string> = {
  top: "top-2 left-2 right-2",
  right: "top-2 bottom-2 right-2 w-3/4 sm:max-w-sm",
  bottom: "bottom-2 left-2 right-2",
  left: "top-2 bottom-2 left-2 w-3/4 sm:max-w-sm",
}

const DURATION = 400

const SheetSideContext = React.createContext<
  ((side: SheetSide) => void) | null
>(null)

const SheetCloseContext = React.createContext({
  hasCloseButton: false,
  hasCloseLabel: false,
})

const FullWindowOverlay =
  Platform.OS === "ios" ? RNFullWindowOverlay : React.Fragment

function Sheet({
  children,
  ...props
}: Omit<
  DrawerPrimitive.RootProps,
  | "swipeDirection"
  | "snapPoints"
  | "snapPoint"
  | "defaultSnapPoint"
  | "onSnapPointChange"
  | "snapToSequentialPoints"
>) {
  const [side, setSide] = React.useState<SheetSide>("right")
  return (
    <SheetSideContext.Provider value={setSide}>
      <DrawerPrimitive.Root swipeDirection={SWIPE_DIRECTION[side]} {...props}>
        {children}
      </DrawerPrimitive.Root>
    </SheetSideContext.Provider>
  )
}

const SheetTrigger = DrawerPrimitive.Trigger

const SheetClose = DrawerPrimitive.Close

const SheetPortal = DrawerPrimitive.Portal

function SheetOverlay({
  className,
  ...props
}: React.ComponentProps<typeof DrawerPrimitive.Backdrop>) {
  return (
    <AnimatedView
      entering={FadeIn.duration(DURATION).reduceMotion(ReduceMotion.System)}
      exiting={FadeOut.duration(DURATION).reduceMotion(ReduceMotion.System)}
      className="absolute top-0 right-0 bottom-0 left-0 z-50"
      style={{ pointerEvents: "box-none" }}
    >
      <DrawerPrimitive.Backdrop
        className={(state) =>
          cn(
            "absolute top-0 right-0 bottom-0 left-0 bg-scrim",
            resolveClassName(className, state)
          )
        }
        {...props}
      />
    </AnimatedView>
  )
}

function SheetContent({
  className,
  children,
  portalHost,
  side = "right",
  showCloseButton = true,
  closeLabel,
  ...props
}: React.ComponentProps<typeof DrawerPrimitive.Popup> & {
  portalHost?: string
  side?: SheetSide
  showCloseButton?: boolean
  closeLabel?: string
}) {
  const setSide = React.useContext(SheetSideContext)
  const insets = useSafeAreaInsets()

  React.useLayoutEffect(() => {
    setSide?.(side)
  }, [setSide, side])

  const frameStyle = React.useMemo<ViewStyle>(
    () => ({
      pointerEvents: "box-none",
      marginTop: side === "bottom" ? 0 : insets.top,
      marginBottom: side === "top" ? 0 : insets.bottom,
      marginLeft: side === "right" ? 0 : insets.left,
      marginRight: side === "left" ? 0 : insets.right,
    }),
    [side, insets]
  )

  const closeContext = React.useMemo(
    () => ({
      hasCloseButton: showCloseButton,
      hasCloseLabel: showCloseButton && closeLabel !== undefined,
    }),
    [showCloseButton, closeLabel]
  )

  return (
    <SheetPortal hostName={portalHost}>
      <FullWindowOverlay>
        <SheetOverlay />
        <DrawerPrimitive.Viewport className="absolute top-0 right-0 bottom-0 left-0 z-50">
          <AnimatedView
            entering={ENTERING[side]
              .duration(DURATION)
              .reduceMotion(ReduceMotion.System)}
            exiting={EXITING[side]
              .duration(DURATION)
              .reduceMotion(ReduceMotion.System)}
            className={cn("absolute z-50", POSITION[side])}
            style={frameStyle}
          >
            <DrawerPrimitive.Popup
              className={(state) =>
                cn(
                  "flex flex-col rounded-3xl bg-surface-raised shadow-xl",
                  (side === "left" || side === "right") && "flex-1",
                  resolveClassName(className, state)
                )
              }
              {...props}
            >
              <SheetCloseContext.Provider value={closeContext}>
                {children}
              </SheetCloseContext.Provider>
              {showCloseButton ? (
                <DrawerPrimitive.Close
                  render={
                    <Button
                      variant={closeLabel ? "plain" : "ghost"}
                      size={closeLabel ? "sm" : "icon-sm"}
                      className={cn(
                        "absolute top-[19px] right-4",
                        !closeLabel && "bg-surface-tertiary active:bg-separator"
                      )}
                    />
                  }
                  hitSlop={8}
                  accessibilityLabel={closeLabel ? undefined : "Close"}
                >
                  {closeLabel ? (
                    <Text className="text-base">{closeLabel}</Text>
                  ) : (
                    <Icon as={XIcon} className="size-4 text-label" />
                  )}
                </DrawerPrimitive.Close>
              ) : null}
            </DrawerPrimitive.Popup>
          </AnimatedView>
        </DrawerPrimitive.Viewport>
      </FullWindowOverlay>
    </SheetPortal>
  )
}

function SheetHeader({ className, ...props }: ViewProps) {
  const { hasCloseButton, hasCloseLabel } = React.useContext(SheetCloseContext)
  return (
    <View
      className={cn(
        "flex flex-col gap-1.5 p-6",
        hasCloseButton && "pr-14",
        hasCloseLabel && "pr-24",
        className
      )}
      {...props}
    />
  )
}

function SheetFooter({ className, ...props }: ViewProps) {
  return (
    <View
      className={cn("mt-auto flex flex-col gap-2 p-6", className)}
      {...props}
    />
  )
}

function SheetTitle({
  className,
  ...props
}: React.ComponentProps<typeof DrawerPrimitive.Title>) {
  return (
    <DrawerPrimitive.Title
      className={(state) =>
        cn(
          "text-base font-semibold text-label",
          resolveClassName(className, state)
        )
      }
      {...props}
    />
  )
}

function SheetDescription({
  className,
  ...props
}: React.ComponentProps<typeof DrawerPrimitive.Description>) {
  return (
    <DrawerPrimitive.Description
      className={(state) =>
        cn("text-sm text-label-secondary", resolveClassName(className, state))
      }
      {...props}
    />
  )
}

export {
  Sheet,
  SheetClose,
  SheetContent,
  SheetDescription,
  SheetFooter,
  SheetHeader,
  SheetTitle,
  SheetTrigger,
}
```

4. Update the import paths to match your project.

**NativeWind**

1. Install the dependencies:

```bash title="Terminal"
npx expo install cn phosphor-react-native react-native-reanimated react-native-safe-area-context react-native-screens react-native-svg react-native-worklets
```

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

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

```tsx title="nativewind/components/ui/sheet.tsx"
import { cn } from "cn"
import { XIcon } from "phosphor-react-native"
import * as React from "react"
import { Platform, View, type ViewProps, type ViewStyle } from "react-native"
import {
  FadeIn,
  FadeInDown,
  FadeInLeft,
  FadeInRight,
  FadeInUp,
  FadeOut,
  FadeOutDown,
  FadeOutLeft,
  FadeOutRight,
  FadeOutUp,
  ReduceMotion,
} from "react-native-reanimated"
import { useSafeAreaInsets } from "react-native-safe-area-context"
import { FullWindowOverlay as RNFullWindowOverlay } from "react-native-screens"
import * as DrawerPrimitive from "@/components/primitives/drawer"
import { resolveClassName } from "@/components/primitives/use-render"
import { AnimatedView } from "@/components/ui/animated-view"
import { Button } from "@/components/ui/button"
import { Icon } from "@/components/ui/icon"
import { Text } from "@/components/ui/text"

type SheetSide = "top" | "right" | "bottom" | "left"

const SWIPE_DIRECTION: Record<SheetSide, DrawerPrimitive.SwipeDirection> = {
  top: "up",
  right: "right",
  bottom: "down",
  left: "left",
}

const ENTERING = {
  top: FadeInUp,
  right: FadeInRight,
  bottom: FadeInDown,
  left: FadeInLeft,
} as const

const EXITING = {
  top: FadeOutUp,
  right: FadeOutRight,
  bottom: FadeOutDown,
  left: FadeOutLeft,
} as const

const POSITION: Record<SheetSide, string> = {
  top: "top-2 left-2 right-2",
  right: "top-2 bottom-2 right-2 w-3/4 sm:max-w-sm",
  bottom: "bottom-2 left-2 right-2",
  left: "top-2 bottom-2 left-2 w-3/4 sm:max-w-sm",
}

const DURATION = 400

const SheetSideContext = React.createContext<
  ((side: SheetSide) => void) | null
>(null)

const SheetCloseContext = React.createContext({
  hasCloseButton: false,
  hasCloseLabel: false,
})

const FullWindowOverlay =
  Platform.OS === "ios" ? RNFullWindowOverlay : React.Fragment

function Sheet({
  children,
  ...props
}: Omit<
  DrawerPrimitive.RootProps,
  | "swipeDirection"
  | "snapPoints"
  | "snapPoint"
  | "defaultSnapPoint"
  | "onSnapPointChange"
  | "snapToSequentialPoints"
>) {
  const [side, setSide] = React.useState<SheetSide>("right")
  return (
    <SheetSideContext.Provider value={setSide}>
      <DrawerPrimitive.Root swipeDirection={SWIPE_DIRECTION[side]} {...props}>
        {children}
      </DrawerPrimitive.Root>
    </SheetSideContext.Provider>
  )
}

const SheetTrigger = DrawerPrimitive.Trigger

const SheetClose = DrawerPrimitive.Close

const SheetPortal = DrawerPrimitive.Portal

function SheetOverlay({
  className,
  ...props
}: React.ComponentProps<typeof DrawerPrimitive.Backdrop>) {
  return (
    <AnimatedView
      entering={FadeIn.duration(DURATION).reduceMotion(ReduceMotion.System)}
      exiting={FadeOut.duration(DURATION).reduceMotion(ReduceMotion.System)}
      className="absolute top-0 right-0 bottom-0 left-0 z-50"
      style={{ pointerEvents: "box-none" }}
    >
      <DrawerPrimitive.Backdrop
        className={(state) =>
          cn(
            "absolute top-0 right-0 bottom-0 left-0 bg-scrim",
            resolveClassName(className, state)
          )
        }
        {...props}
      />
    </AnimatedView>
  )
}

function SheetContent({
  className,
  children,
  portalHost,
  side = "right",
  showCloseButton = true,
  closeLabel,
  ...props
}: React.ComponentProps<typeof DrawerPrimitive.Popup> & {
  portalHost?: string
  side?: SheetSide
  showCloseButton?: boolean
  closeLabel?: string
}) {
  const setSide = React.useContext(SheetSideContext)
  const insets = useSafeAreaInsets()

  React.useLayoutEffect(() => {
    setSide?.(side)
  }, [setSide, side])

  const frameStyle = React.useMemo<ViewStyle>(
    () => ({
      pointerEvents: "box-none",
      marginTop: side === "bottom" ? 0 : insets.top,
      marginBottom: side === "top" ? 0 : insets.bottom,
      marginLeft: side === "right" ? 0 : insets.left,
      marginRight: side === "left" ? 0 : insets.right,
    }),
    [side, insets]
  )

  const closeContext = React.useMemo(
    () => ({
      hasCloseButton: showCloseButton,
      hasCloseLabel: showCloseButton && closeLabel !== undefined,
    }),
    [showCloseButton, closeLabel]
  )

  return (
    <SheetPortal hostName={portalHost}>
      <FullWindowOverlay>
        <SheetOverlay />
        <DrawerPrimitive.Viewport className="absolute top-0 right-0 bottom-0 left-0 z-50">
          <AnimatedView
            entering={ENTERING[side]
              .duration(DURATION)
              .reduceMotion(ReduceMotion.System)}
            exiting={EXITING[side]
              .duration(DURATION)
              .reduceMotion(ReduceMotion.System)}
            className={cn("absolute z-50", POSITION[side])}
            style={frameStyle}
          >
            <DrawerPrimitive.Popup
              className={(state) =>
                cn(
                  "flex flex-col rounded-3xl bg-surface-raised shadow-xl",
                  (side === "left" || side === "right") && "flex-1",
                  resolveClassName(className, state)
                )
              }
              {...props}
            >
              <SheetCloseContext.Provider value={closeContext}>
                {children}
              </SheetCloseContext.Provider>
              {showCloseButton ? (
                <DrawerPrimitive.Close
                  render={
                    <Button
                      variant={closeLabel ? "plain" : "ghost"}
                      size={closeLabel ? "sm" : "icon-sm"}
                      className={cn(
                        "absolute top-[19px] right-4",
                        !closeLabel && "bg-surface-tertiary active:bg-separator"
                      )}
                    />
                  }
                  hitSlop={8}
                  accessibilityLabel={closeLabel ? undefined : "Close"}
                >
                  {closeLabel ? (
                    <Text className="text-base">{closeLabel}</Text>
                  ) : (
                    <Icon as={XIcon} className="size-4 text-label" />
                  )}
                </DrawerPrimitive.Close>
              ) : null}
            </DrawerPrimitive.Popup>
          </AnimatedView>
        </DrawerPrimitive.Viewport>
      </FullWindowOverlay>
    </SheetPortal>
  )
}

function SheetHeader({ className, ...props }: ViewProps) {
  const { hasCloseButton, hasCloseLabel } = React.useContext(SheetCloseContext)
  return (
    <View
      className={cn(
        "flex flex-col gap-1.5 p-6",
        hasCloseButton && "pr-14",
        hasCloseLabel && "pr-24",
        className
      )}
      {...props}
    />
  )
}

function SheetFooter({ className, ...props }: ViewProps) {
  return (
    <View
      className={cn("mt-auto flex flex-col gap-2 p-6", className)}
      {...props}
    />
  )
}

function SheetTitle({
  className,
  ...props
}: React.ComponentProps<typeof DrawerPrimitive.Title>) {
  return (
    <DrawerPrimitive.Title
      className={(state) =>
        cn(
          "text-base font-semibold text-label",
          resolveClassName(className, state)
        )
      }
      {...props}
    />
  )
}

function SheetDescription({
  className,
  ...props
}: React.ComponentProps<typeof DrawerPrimitive.Description>) {
  return (
    <DrawerPrimitive.Description
      className={(state) =>
        cn("text-sm text-label-secondary", resolveClassName(className, state))
      }
      {...props}
    />
  )
}

export {
  Sheet,
  SheetClose,
  SheetContent,
  SheetDescription,
  SheetFooter,
  SheetHeader,
  SheetTitle,
  SheetTrigger,
}
```

4. Update the import paths to match your project.

**StyleSheet**

1. Install the dependencies:

```bash title="Terminal"
npx expo install phosphor-react-native react-native-reanimated react-native-safe-area-context react-native-screens react-native-svg react-native-worklets
```

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

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

```tsx title="stylesheet/components/ui/sheet.tsx"
import { XIcon } from "phosphor-react-native"
import * as React from "react"
import {
  Platform,
  StyleSheet,
  useWindowDimensions,
  View,
  type ViewProps,
  type ViewStyle,
} from "react-native"
import {
  FadeIn,
  FadeInDown,
  FadeInLeft,
  FadeInRight,
  FadeInUp,
  FadeOut,
  FadeOutDown,
  FadeOutLeft,
  FadeOutRight,
  FadeOutUp,
  ReduceMotion,
} from "react-native-reanimated"
import { useSafeAreaInsets } from "react-native-safe-area-context"
import { FullWindowOverlay as RNFullWindowOverlay } from "react-native-screens"
import * as DrawerPrimitive from "@/components/primitives/drawer"
import { AnimatedView } from "@/components/ui/animated-view"
import { Button } from "@/components/ui/button"
import { Icon } from "@/components/ui/icon"
import { Text } from "@/components/ui/text"
import { fontSize, radius, shadow, useTheme } from "@/components/ui/theme"

type SheetSide = "top" | "right" | "bottom" | "left"

const SWIPE_DIRECTION: Record<SheetSide, DrawerPrimitive.SwipeDirection> = {
  top: "up",
  right: "right",
  bottom: "down",
  left: "left",
}

const ENTERING = {
  top: FadeInUp,
  right: FadeInRight,
  bottom: FadeInDown,
  left: FadeInLeft,
} as const

const EXITING = {
  top: FadeOutUp,
  right: FadeOutRight,
  bottom: FadeOutDown,
  left: FadeOutLeft,
} as const

const POSITION: Record<SheetSide, ViewStyle> = {
  top: { top: 8, left: 8, right: 8 },
  right: { top: 8, bottom: 8, right: 8, width: "75%" },
  bottom: { bottom: 8, left: 8, right: 8 },
  left: { top: 8, bottom: 8, left: 8, width: "75%" },
}

const DURATION = 400

const styles = StyleSheet.create({
  layer: { ...StyleSheet.absoluteFill, zIndex: 50, pointerEvents: "box-none" },
  fill: { ...StyleSheet.absoluteFill },
  frame: { position: "absolute", zIndex: 50 },
  popup: {
    display: "flex",
    flexDirection: "column",
    borderRadius: radius["3xl"],
    ...shadow.xl,
  },
  popupFill: { flex: 1 },
  close: { position: "absolute", top: 19, right: 16 },
  closeIcon: { flexShrink: 0 },
  closeLabel: { ...fontSize.base },
  header: { display: "flex", flexDirection: "column", gap: 6, padding: 24 },
  footer: {
    marginTop: "auto",
    display: "flex",
    flexDirection: "column",
    gap: 8,
    padding: 24,
  },
  title: { ...fontSize.base, fontWeight: "600" },
  description: { ...fontSize.sm },
})

const SheetSideContext = React.createContext<
  ((side: SheetSide) => void) | null
>(null)

const SheetCloseContext = React.createContext({
  hasCloseButton: false,
  hasCloseLabel: false,
})

const FullWindowOverlay =
  Platform.OS === "ios" ? RNFullWindowOverlay : React.Fragment

function Sheet({
  children,
  ...props
}: Omit<
  DrawerPrimitive.RootProps,
  | "swipeDirection"
  | "snapPoints"
  | "snapPoint"
  | "defaultSnapPoint"
  | "onSnapPointChange"
  | "snapToSequentialPoints"
>) {
  const [side, setSide] = React.useState<SheetSide>("right")
  return (
    <SheetSideContext.Provider value={setSide}>
      <DrawerPrimitive.Root swipeDirection={SWIPE_DIRECTION[side]} {...props}>
        {children}
      </DrawerPrimitive.Root>
    </SheetSideContext.Provider>
  )
}

const SheetTrigger = DrawerPrimitive.Trigger

const SheetClose = DrawerPrimitive.Close

const SheetPortal = DrawerPrimitive.Portal

function SheetOverlay({
  style,
  ...props
}: React.ComponentProps<typeof DrawerPrimitive.Backdrop>) {
  const { colors } = useTheme()
  return (
    <AnimatedView
      entering={FadeIn.duration(DURATION).reduceMotion(ReduceMotion.System)}
      exiting={FadeOut.duration(DURATION).reduceMotion(ReduceMotion.System)}
      style={styles.layer}
    >
      <DrawerPrimitive.Backdrop
        style={(state) => [
          styles.fill,
          { backgroundColor: colors.scrim },
          typeof style === "function" ? style(state) : style,
        ]}
        {...props}
      />
    </AnimatedView>
  )
}

function SheetContent({
  style,
  children,
  portalHost,
  side = "right",
  showCloseButton = true,
  closeLabel,
  ...props
}: React.ComponentProps<typeof DrawerPrimitive.Popup> & {
  portalHost?: string
  side?: SheetSide
  showCloseButton?: boolean
  closeLabel?: string
}) {
  const { colors } = useTheme()
  const setSide = React.useContext(SheetSideContext)
  const insets = useSafeAreaInsets()
  const { width } = useWindowDimensions()
  const horizontal = side === "left" || side === "right"

  React.useLayoutEffect(() => {
    setSide?.(side)
  }, [setSide, side])

  const frameStyle = React.useMemo<ViewStyle>(
    () => ({
      ...POSITION[side],
      maxWidth: horizontal && width >= 640 ? 384 : undefined,
      pointerEvents: "box-none",
      marginTop: side === "bottom" ? 0 : insets.top,
      marginBottom: side === "top" ? 0 : insets.bottom,
      marginLeft: side === "right" ? 0 : insets.left,
      marginRight: side === "left" ? 0 : insets.right,
    }),
    [side, horizontal, width, insets]
  )

  const closeContext = React.useMemo(
    () => ({
      hasCloseButton: showCloseButton,
      hasCloseLabel: showCloseButton && closeLabel !== undefined,
    }),
    [showCloseButton, closeLabel]
  )

  return (
    <SheetPortal hostName={portalHost}>
      <FullWindowOverlay>
        <SheetOverlay />
        <DrawerPrimitive.Viewport style={styles.layer}>
          <AnimatedView
            entering={ENTERING[side]
              .duration(DURATION)
              .reduceMotion(ReduceMotion.System)}
            exiting={EXITING[side]
              .duration(DURATION)
              .reduceMotion(ReduceMotion.System)}
            style={[styles.frame, frameStyle]}
          >
            <DrawerPrimitive.Popup
              style={(state) => [
                styles.popup,
                { backgroundColor: colors.surfaceRaised },
                horizontal && styles.popupFill,
                typeof style === "function" ? style(state) : style,
              ]}
              {...props}
            >
              <SheetCloseContext.Provider value={closeContext}>
                {children}
              </SheetCloseContext.Provider>
              {showCloseButton ? (
                <DrawerPrimitive.Close
                  render={
                    <Button
                      variant={closeLabel ? "plain" : "ghost"}
                      size={closeLabel ? "sm" : "icon-sm"}
                      style={({ pressed }) => [
                        styles.close,
                        !closeLabel && {
                          backgroundColor: pressed
                            ? colors.separator
                            : colors.surfaceTertiary,
                        },
                      ]}
                    />
                  }
                  hitSlop={8}
                  accessibilityLabel={closeLabel ? undefined : "Close"}
                >
                  {closeLabel ? (
                    <Text style={styles.closeLabel}>{closeLabel}</Text>
                  ) : (
                    <Icon
                      as={XIcon}
                      size={16}
                      color={colors.label}
                      style={styles.closeIcon}
                    />
                  )}
                </DrawerPrimitive.Close>
              ) : null}
            </DrawerPrimitive.Popup>
          </AnimatedView>
        </DrawerPrimitive.Viewport>
      </FullWindowOverlay>
    </SheetPortal>
  )
}

function SheetHeader({ style, ...props }: ViewProps) {
  const { hasCloseButton, hasCloseLabel } = React.useContext(SheetCloseContext)
  return (
    <View
      style={[
        styles.header,
        hasCloseButton && { paddingRight: hasCloseLabel ? 96 : 56 },
        style,
      ]}
      {...props}
    />
  )
}

function SheetFooter({ style, ...props }: ViewProps) {
  return <View style={[styles.footer, style]} {...props} />
}

function SheetTitle({
  style,
  ...props
}: React.ComponentProps<typeof DrawerPrimitive.Title>) {
  const { colors } = useTheme()
  return (
    <DrawerPrimitive.Title
      style={(state) => [
        styles.title,
        { color: colors.label },
        typeof style === "function" ? style(state) : style,
      ]}
      {...props}
    />
  )
}

function SheetDescription({
  style,
  ...props
}: React.ComponentProps<typeof DrawerPrimitive.Description>) {
  const { colors } = useTheme()
  return (
    <DrawerPrimitive.Description
      style={(state) => [
        styles.description,
        { color: colors.labelSecondary },
        typeof style === "function" ? style(state) : style,
      ]}
      {...props}
    />
  )
}

export {
  Sheet,
  SheetClose,
  SheetContent,
  SheetDescription,
  SheetFooter,
  SheetHeader,
  SheetTitle,
  SheetTrigger,
}
```

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/Sheet.swift"
import SwiftUI

extension View {
  public func sheet<Content: View>(
    isPresented: Binding<Bool>,
    side: Edge,
    @ViewBuilder content: @escaping () -> Content
  ) -> some View {
    modifier(
      CoverPresenter(
        isPresented: isPresented,
        enter: .easeOut(duration: 0.4),
        exit: .easeIn(duration: 0.3)
      ) { visible in
        SideSheetStage(side: side, visible: visible, content: content)
      }
    )
  }
}

extension EnvironmentValues {
  @Entry var sheetSide: Edge = .trailing
}

struct SideSheetStage<Content: View>: View {
  let side: Edge
  let visible: Bool
  @ViewBuilder let content: () -> Content

  @State private var drag: CGFloat = 0
  @Environment(\.overlayDismiss) private var dismiss
  @Environment(\.accessibilityReduceMotion) private var reduceMotion
  @Environment(\.layoutDirection) private var layoutDirection

  var body: some View {
    GeometryReader { proxy in
      let horizontal = side == .leading || side == .trailing
      let width = min(proxy.size.width * 0.75, proxy.size.width >= 640 ? 384 : .infinity)
      ZStack(alignment: alignment) {
        ScrimLayer(visible: visible)
        content()
          .environment(\.sheetSide, side)
          .frame(width: horizontal ? width : nil)
          .frame(maxHeight: horizontal ? .infinity : nil)
          .padding(8)
          .offset(offset(visible: visible))
          .opacity(visible ? 1 : 0)
          .gesture(swipe)
      }
      .frame(width: proxy.size.width, height: proxy.size.height)
    }
    .accessibilityAction(.escape) { dismiss?() }
  }

  private var alignment: Alignment {
    switch side {
    case .top: .top
    case .bottom: .bottom
    case .leading: .leading
    case .trailing: .trailing
    }
  }

  private var direction: CGSize {
    let flip: CGFloat = layoutDirection == .rightToLeft ? -1 : 1
    switch side {
    case .top: return CGSize(width: 0, height: -1)
    case .bottom: return CGSize(width: 0, height: 1)
    case .leading: return CGSize(width: -flip, height: 0)
    case .trailing: return CGSize(width: flip, height: 0)
    }
  }

  private func offset(visible: Bool) -> CGSize {
    let distance = (visible || reduceMotion ? 0 : 25) + drag
    return CGSize(width: direction.width * distance, height: direction.height * distance)
  }

  private var swipe: some Gesture {
    DragGesture(minimumDistance: 10)
      .onChanged { value in
        let moved = value.translation.width * direction.width + value.translation.height * direction.height
        drag = max(0, moved)
      }
      .onEnded { value in
        let predicted = value.predictedEndTranslation.width * direction.width
          + value.predictedEndTranslation.height * direction.height
        if drag > 80 || predicted > 240 {
          dismiss?()
          withAnimation(.easeIn(duration: 0.3)) { drag += 60 }
        } else {
          withAnimation(.spring(duration: 0.3)) { drag = 0 }
        }
      }
  }
}

public struct SheetContent<Content: View>: View {
  let showCloseButton: Bool
  let closeLabel: LocalizedStringKey?
  let content: Content

  @Environment(\.sheetSide) private var side

  public init(
    showCloseButton: Bool = true,
    closeLabel: LocalizedStringKey? = nil,
    @ViewBuilder content: () -> Content
  ) {
    self.showCloseButton = showCloseButton
    self.closeLabel = closeLabel
    self.content = content()
  }

  public var body: some View {
    let horizontal = side == .leading || side == .trailing
    let shape = RoundedRectangle(cornerRadius: Radius.xl3, style: .continuous)
    VStack(alignment: .leading, spacing: 0) {
      content
    }
    .frame(maxWidth: .infinity, maxHeight: horizontal ? .infinity : nil, alignment: .topLeading)
    .fixedSize(horizontal: false, vertical: !horizontal)
    .environment(\.overlayCloseInset, showCloseButton ? (closeLabel == nil ? 56 : 96) : 0)
    .clipShape(shape)
    .background {
      shape
        .fill(Color.surfaceRaised)
        .shadow(.lg)
    }
    .overlay(alignment: .topTrailing) {
      if showCloseButton {
        OverlayCloseButton(label: closeLabel)
          .padding(.top, closeLabel == nil ? 19 : 17)
          .padding(.trailing, 16)
      }
    }
    .accessibilityElement(children: .contain)
    .accessibilityAddTraits(.isModal)
  }
}

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

  @Environment(\.overlayCloseInset) private var closeInset

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

  public var body: some View {
    VStack(alignment: .leading, spacing: 6) {
      content
    }
    .frame(maxWidth: .infinity, alignment: .leading)
    .padding(24)
    .padding(.trailing, max(closeInset - 24, 0))
  }
}

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

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

  public var body: some View {
    VStack(spacing: 0) {
      Spacer(minLength: 0)
      VStack(spacing: 8) {
        content
      }
      .frame(maxWidth: .infinity)
      .padding(24)
    }
  }
}

public typealias SheetTitle = DialogTitle
public typealias SheetDescription = DialogDescription
public typealias SheetClose<Label: View> = DialogClose<Label>
```

```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/Dialog.swift"
import SwiftUI

extension View {
  public func dialog<Content: View>(
    isPresented: Binding<Bool>,
    @ViewBuilder content: @escaping () -> Content
  ) -> some View {
    modifier(
      CoverPresenter(isPresented: isPresented) { visible in
        CenteredStage(visible: visible, dismissible: true, content: content)
      }
    )
  }
}

struct CenteredStage<Content: View>: View {
  let visible: Bool
  let dismissible: Bool
  @ViewBuilder let content: () -> Content

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

  var body: some View {
    ZStack {
      ScrimLayer(visible: visible, dismissible: dismissible)
      content()
        .scaleEffect(visible || reduceMotion ? 1 : 0.95)
        .opacity(visible ? 1 : 0)
        .padding(16)
    }
    .accessibilityAction(.escape) { dismiss?() }
  }
}

extension EnvironmentValues {
  @Entry var overlayCloseInset: CGFloat = 0
}

public struct DialogContent<Content: View>: View {
  let showCloseButton: Bool
  let closeLabel: LocalizedStringKey?
  let content: Content

  public init(
    showCloseButton: Bool = true,
    closeLabel: LocalizedStringKey? = nil,
    @ViewBuilder content: () -> Content
  ) {
    self.showCloseButton = showCloseButton
    self.closeLabel = closeLabel
    self.content = content()
  }

  public var body: some View {
    VStack(alignment: .leading, spacing: 24) {
      content
    }
    .padding(24)
    .frame(maxWidth: 448, alignment: .leading)
    .environment(\.overlayCloseInset, showCloseButton ? (closeLabel == nil ? 32 : 72) : 0)
    .popupSurface(radius: Radius.xl2)
    .overlay(alignment: .topTrailing) {
      if showCloseButton {
        OverlayCloseButton(label: closeLabel)
          .padding(.top, closeLabel == nil ? 19 : 17)
          .padding(.trailing, 16)
      }
    }
    .accessibilityElement(children: .contain)
    .accessibilityAddTraits(.isModal)
  }
}

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

  @Environment(\.overlayCloseInset) private var closeInset

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

  public var body: some View {
    VStack(alignment: .leading, spacing: 6) {
      content
    }
    .padding(.trailing, closeInset)
    .frame(maxWidth: .infinity, alignment: .leading)
  }
}

public struct DialogFooter<Content: View>: View {
  let showCloseButton: Bool
  let content: Content

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

  public var body: some View {
    ReversedVStack(spacing: 8) {
      content
      if showCloseButton {
        DialogClose {
          Text("Close").frame(maxWidth: .infinity)
        }
        .buttonStyle(.variant(.secondary))
      }
    }
  }
}

extension DialogFooter where Content == EmptyView {
  public init(showCloseButton: Bool) {
    self.init(showCloseButton: showCloseButton) { EmptyView() }
  }
}

public struct DialogTitle: View {
  let text: Text

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

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

  public var body: some View {
    text
      .textStyle(.base, weight: .semibold)
      .foregroundStyle(Color.label)
      .fixedSize(horizontal: false, vertical: true)
      .accessibilityAddTraits(.isHeader)
  }
}

public struct DialogDescription: View {
  let text: Text

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

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

  public var body: some View {
    text
      .textStyle(.sm)
      .foregroundStyle(Color.labelSecondary)
      .fixedSize(horizontal: false, vertical: true)
  }
}

public struct DialogClose<Label: View>: View {
  let action: (() -> Void)?
  let label: Label

  @Environment(\.overlayDismiss) private var dismiss

  public init(action: (() -> Void)? = nil, @ViewBuilder label: () -> Label) {
    self.action = action
    self.label = label()
  }

  public var body: some View {
    Button {
      action?()
      dismiss?()
    } label: {
      label
    }
  }
}

extension DialogClose where Label == Text {
  public init(_ title: LocalizedStringKey, action: (() -> Void)? = nil) {
    self.init(action: action) { Text(title) }
  }
}
```

```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/Separator.swift"
import SwiftUI

public struct Separator: View {
  let orientation: Axis

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

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

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

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

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

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

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

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

private struct TextVariantModifier: ViewModifier {
  let variant: TextVariant

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

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

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

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

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

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

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

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

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

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

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

5. Add the files to your app target.

**Jetpack Compose**

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

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

2. Copy the theme files every view uses:

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

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

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

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

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

val LocalColors = staticCompositionLocalOf { LightColors }

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

    val typography: Typography
        get() = Typography

    val radius: Radius
        get() = Radius

    val shadows: Shadows
        get() = Shadows
}

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

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

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

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

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

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

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

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

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

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

3. Copy the source and every file it uses:

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

import androidx.compose.animation.AnimatedVisibility
import androidx.compose.animation.core.Animatable
import androidx.compose.animation.core.MutableTransitionState
import androidx.compose.animation.core.tween
import androidx.compose.animation.fadeIn
import androidx.compose.animation.fadeOut
import androidx.compose.animation.slideIn
import androidx.compose.animation.slideOut
import androidx.compose.foundation.background
import androidx.compose.foundation.gestures.Orientation
import androidx.compose.foundation.gestures.draggable
import androidx.compose.foundation.gestures.rememberDraggableState
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.BoxWithConstraints
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.ColumnScope
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.WindowInsets
import androidx.compose.foundation.layout.WindowInsetsSides
import androidx.compose.foundation.layout.absoluteOffset
import androidx.compose.foundation.layout.fillMaxHeight
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.only
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.safeDrawing
import androidx.compose.foundation.layout.width
import androidx.compose.foundation.layout.windowInsetsPadding
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.foundation.text.BasicText
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.Immutable
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.mutableFloatStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.rememberCoroutineScope
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.AbsoluteAlignment
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.input.pointer.pointerInput
import androidx.compose.ui.layout.onSizeChanged
import androidx.compose.ui.platform.LocalDensity
import androidx.compose.ui.semantics.paneTitle
import androidx.compose.ui.semantics.semantics
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 SheetSide { Top, Right, Bottom, Left }

@Immutable
private data class SheetInfo(
    val hasCloseButton: Boolean,
    val hasCloseLabel: Boolean,
    val fillsHeight: Boolean,
)

private val LocalSheetInfo = staticCompositionLocalOf { SheetInfo(false, false, false) }

private const val SheetDuration = 400

@Composable
fun Sheet(
    open: Boolean,
    onOpenChange: (Boolean) -> Unit,
    modifier: Modifier = Modifier,
    side: SheetSide = SheetSide.Right,
    showCloseButton: Boolean = true,
    closeLabel: String? = null,
    content: @Composable ColumnScope.() -> Unit,
) {
    val transition = remember { MutableTransitionState(false) }
    transition.targetState = open
    val paneTitle = remember { PaneTitleState() }
    val drag = remember { Animatable(0f) }
    val scope = rememberCoroutineScope()
    val close = { if (open) onOpenChange(false) }
    LaunchedEffect(open) { if (open) drag.snapTo(0f) }

    val horizontal = side == SheetSide.Left || side == SheetSide.Right
    val sign = if (side == SheetSide.Right || side == SheetSide.Bottom) 1f else -1f
    val alignment = when (side) {
        SheetSide.Top -> AbsoluteAlignment.TopLeft
        SheetSide.Right -> AbsoluteAlignment.CenterRight
        SheetSide.Bottom -> AbsoluteAlignment.BottomLeft
        SheetSide.Left -> AbsoluteAlignment.CenterLeft
    }
    val insetSides = when (side) {
        SheetSide.Top -> WindowInsetsSides.Top + WindowInsetsSides.Horizontal
        SheetSide.Bottom -> WindowInsetsSides.Bottom + WindowInsetsSides.Horizontal
        SheetSide.Left -> WindowInsetsSides.Vertical + WindowInsetsSides.Left
        SheetSide.Right -> WindowInsetsSides.Vertical + WindowInsetsSides.Right
    }
    val colors = EsuissTheme.colors
    val density = LocalDensity.current
    val slide = with(density) { 25.dp.roundToPx() }
    fun edgeOffset(): IntOffset = when (side) {
        SheetSide.Top -> IntOffset(0, -slide)
        SheetSide.Bottom -> IntOffset(0, slide)
        SheetSide.Left -> IntOffset(-slide, 0)
        SheetSide.Right -> IntOffset(slide, 0)
    }

    ModalWindow(
        visible = transition.currentState || transition.targetState,
        onDismissRequest = close,
        dismissOnBackPress = true,
        paneTitle = paneTitle.value,
    ) {
        BoxWithConstraints(modifier = Modifier.fillMaxSize()) {
            val wide = maxWidth >= 640.dp
            Scrim(transition, SheetDuration, SheetDuration, onClick = close)
            AnimatedVisibility(
                visibleState = transition,
                modifier = Modifier
                    .align(alignment)
                    .windowInsetsPadding(WindowInsets.safeDrawing.only(insetSides))
                    .padding(8.dp),
                enter = fadeIn(tween(SheetDuration)) + slideIn(tween(SheetDuration)) { edgeOffset() },
                exit = fadeOut(tween(SheetDuration)) + slideOut(tween(SheetDuration)) { edgeOffset() },
            ) {
                val extent = remember { mutableFloatStateOf(1f) }
                val shape = RoundedCornerShape(Radius.xl3)
                val sizing = if (horizontal) {
                    val width = if (wide) minOf(this@BoxWithConstraints.maxWidth * 0.75f, 384.dp) else this@BoxWithConstraints.maxWidth * 0.75f
                    Modifier.width(width).fillMaxHeight()
                } else {
                    Modifier.fillMaxWidth()
                }
                Box(
                    modifier = modifier
                        .then(sizing)
                        .onSizeChanged { extent.floatValue = (if (horizontal) it.width else it.height).toFloat() }
                        .absoluteOffset {
                            val value = (drag.value * sign).roundToInt()
                            if (horizontal) IntOffset(value, 0) else IntOffset(0, value)
                        }
                        .draggable(
                            orientation = if (horizontal) Orientation.Horizontal else Orientation.Vertical,
                            state = rememberDraggableState { delta ->
                                scope.launch { drag.snapTo((drag.value + delta * sign).coerceAtLeast(0f)) }
                            },
                            onDragStopped = { velocity ->
                                if (drag.value > extent.floatValue * 0.3f || velocity * sign > 1000f) {
                                    close()
                                } else {
                                    drag.animateTo(0f, tween(200))
                                }
                            },
                        )
                        .shadow(Shadows.lg, shape)
                        .clip(shape)
                        .background(colors.surfaceRaised, shape)
                        .pointerInput(Unit) {}
                        .semantics { paneTitle.value?.let { this.paneTitle = it } },
                ) {
                    CompositionLocalProvider(
                        LocalPaneTitle provides paneTitle,
                        LocalSheetInfo provides SheetInfo(showCloseButton, showCloseButton && closeLabel != null, horizontal),
                        LocalContentStyle provides Typography.base.copy(color = colors.label),
                        LocalContentColor provides colors.label,
                    ) {
                        Column(
                            modifier = if (horizontal) Modifier.fillMaxSize() else Modifier.fillMaxWidth(),
                            content = content,
                        )
                    }
                    if (showCloseButton) {
                        OverlayCloseButton(
                            onClick = close,
                            label = closeLabel,
                            modifier = Modifier
                                .align(Alignment.TopEnd)
                                .padding(
                                    top = if (closeLabel != null) 19.dp else 13.dp,
                                    end = if (closeLabel != null) 16.dp else 10.dp,
                                ),
                        )
                    }
                }
            }
        }
    }
}

@Composable
fun SheetHeader(
    modifier: Modifier = Modifier,
    content: @Composable ColumnScope.() -> Unit,
) {
    val info = LocalSheetInfo.current
    val end = when {
        info.hasCloseLabel -> 96.dp
        info.hasCloseButton -> 56.dp
        else -> 24.dp
    }
    Column(
        modifier = modifier.fillMaxWidth().padding(start = 24.dp, top = 24.dp, bottom = 24.dp, end = end),
        verticalArrangement = Arrangement.spacedBy(6.dp),
        content = content,
    )
}

@Composable
fun ColumnScope.SheetFooter(
    modifier: Modifier = Modifier,
    content: @Composable ColumnScope.() -> Unit,
) {
    if (LocalSheetInfo.current.fillsHeight) {
        Spacer(Modifier.weight(1f))
    }
    Column(
        modifier = modifier.fillMaxWidth().padding(24.dp),
        verticalArrangement = Arrangement.spacedBy(8.dp),
        content = content,
    )
}

@Composable
fun SheetTitle(text: String, modifier: Modifier = Modifier) {
    OverlayTitle(text, modifier, titleStyle(EsuissTheme.colors))
}

@Composable
fun SheetDescription(text: String, modifier: Modifier = Modifier) {
    BasicText(text, modifier = modifier, style = descriptionStyle(EsuissTheme.colors))
}
```

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

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

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

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

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

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

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

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

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

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

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

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

enum class ButtonGroupOrientation { Horizontal, Vertical }

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

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

internal object ButtonGroupFill

private object ButtonGroupDivider

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

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

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

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

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

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

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

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

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

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

val LocalContentStyle = compositionLocalOf { TextStyle.Default }

val LocalContentColor = compositionLocalOf { Color.Unspecified }

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

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

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

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

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

import android.os.Build
import android.view.Window
import android.view.WindowManager
import androidx.compose.animation.AnimatedVisibility
import androidx.compose.animation.AnimatedVisibilityScope
import androidx.compose.animation.EnterExitState
import androidx.compose.animation.core.MutableTransitionState
import androidx.compose.animation.core.animateFloat
import androidx.compose.animation.core.tween
import androidx.compose.animation.fadeIn
import androidx.compose.animation.fadeOut
import androidx.compose.animation.scaleIn
import androidx.compose.animation.scaleOut
import androidx.compose.animation.slideIn
import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.clickable
import androidx.compose.foundation.gestures.awaitEachGesture
import androidx.compose.foundation.gestures.awaitFirstDown
import androidx.compose.foundation.gestures.detectTapGestures
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.interaction.collectIsPressedAsState
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.WindowInsets
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.ime
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.shape.CircleShape
import androidx.compose.foundation.text.BasicText
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.SideEffect
import androidx.compose.runtime.Stable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableIntStateOf
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.rememberUpdatedState
import androidx.compose.runtime.setValue
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.geometry.Offset
import androidx.compose.ui.graphics.CompositingStrategy
import androidx.compose.ui.graphics.Shape
import androidx.compose.ui.graphics.TransformOrigin
import androidx.compose.ui.graphics.graphicsLayer
import androidx.compose.ui.input.pointer.PointerEventPass
import androidx.compose.ui.input.pointer.pointerInput
import androidx.compose.ui.platform.LocalDensity
import androidx.compose.ui.platform.LocalView
import androidx.compose.ui.platform.LocalWindowInfo
import androidx.compose.ui.semantics.Role
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.heading
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.IntOffset
import androidx.compose.ui.unit.IntRect
import androidx.compose.ui.unit.IntSize
import androidx.compose.ui.unit.LayoutDirection
import androidx.compose.ui.unit.dp
import androidx.compose.ui.window.Dialog as WindowDialog
import androidx.compose.ui.window.DialogProperties
import androidx.compose.ui.window.DialogWindowProvider
import androidx.compose.ui.window.Popup
import androidx.compose.ui.window.PopupPositionProvider
import androidx.compose.ui.window.PopupProperties
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.X
import com.esuiss.ui.theme.Colors
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Shadow
import com.esuiss.ui.theme.Shadows
import com.esuiss.ui.theme.Typography
import com.esuiss.ui.theme.shadow
import kotlin.math.max
import kotlin.math.min

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

enum class PopupAlign { Start, Center, End }

internal val PopupInset = 16.dp

internal val PopupMargin = 8.dp

@Stable
internal class PopupPlacement {
    var anchorWidth by mutableIntStateOf(0)
}

internal class AnchoredPositionProvider(
    private val side: PopupSide,
    private val align: PopupAlign,
    private val sideOffset: Int,
    private val alignOffset: Int,
    private val inset: Int,
    private val margin: Int,
    private val bottomLimit: Int,
    private val point: IntOffset?,
    private val placement: PopupPlacement,
) : PopupPositionProvider {
    override fun calculatePosition(
        anchorBounds: IntRect,
        windowSize: IntSize,
        layoutDirection: LayoutDirection,
        popupContentSize: IntSize,
    ): IntOffset {
        val anchor = if (point != null) {
            val x = anchorBounds.left + point.x
            val y = anchorBounds.top + point.y
            IntRect(x, y, x, y)
        } else {
            anchorBounds
        }
        val width = (popupContentSize.width - inset * 2).coerceAtLeast(0)
        val height = (popupContentSize.height - inset * 2).coerceAtLeast(0)
        val left = margin
        val top = margin
        val right = windowSize.width - margin
        val bottom = min(windowSize.height, bottomLimit) - margin

        fun space(candidate: PopupSide): Int = when (candidate) {
            PopupSide.Bottom -> bottom - anchor.bottom - sideOffset
            PopupSide.Top -> anchor.top - sideOffset - top
            PopupSide.Right -> right - anchor.right - sideOffset
            PopupSide.Left -> anchor.left - sideOffset - left
        }

        val opposite = when (side) {
            PopupSide.Bottom -> PopupSide.Top
            PopupSide.Top -> PopupSide.Bottom
            PopupSide.Left -> PopupSide.Right
            PopupSide.Right -> PopupSide.Left
        }
        val vertical = side == PopupSide.Top || side == PopupSide.Bottom
        val needed = if (vertical) height else width
        val resolved = if (space(side) >= needed || space(side) >= space(opposite)) side else opposite
        val rtl = layoutDirection == LayoutDirection.Rtl

        var x: Int
        var y: Int
        if (vertical) {
            x = when (align) {
                PopupAlign.Start -> if (rtl) anchor.right - width else anchor.left
                PopupAlign.Center -> anchor.left + (anchor.width - width) / 2
                PopupAlign.End -> if (rtl) anchor.left else anchor.right - width
            } + if (rtl) -alignOffset else alignOffset
            y = if (resolved == PopupSide.Bottom) anchor.bottom + sideOffset else anchor.top - sideOffset - height
        } else {
            y = when (align) {
                PopupAlign.Start -> anchor.top
                PopupAlign.Center -> anchor.top + (anchor.height - height) / 2
                PopupAlign.End -> anchor.bottom - height
            } + alignOffset
            x = if (resolved == PopupSide.Right) anchor.right + sideOffset else anchor.left - sideOffset - width
        }
        x = x.coerceIn(left, max(left, right - width))
        y = y.coerceIn(top, max(top, bottom - height))
        placement.anchorWidth = anchorBounds.width
        return IntOffset(x - inset, y - inset)
    }
}

private fun transformOrigin(side: PopupSide): TransformOrigin = when (side) {
    PopupSide.Bottom -> TransformOrigin(0.5f, 0f)
    PopupSide.Top -> TransformOrigin(0.5f, 1f)
    PopupSide.Left -> TransformOrigin(1f, 0.5f)
    PopupSide.Right -> TransformOrigin(0f, 0.5f)
}

@Composable
internal fun AnchoredPopup(
    expanded: Boolean,
    onDismissRequest: () -> Unit,
    side: PopupSide = PopupSide.Bottom,
    align: PopupAlign = PopupAlign.Center,
    sideOffset: Dp = 4.dp,
    alignOffset: Dp = 0.dp,
    focusable: Boolean = true,
    point: IntOffset? = null,
    enterMillis: Int = 150,
    exitMillis: Int = 100,
    content: @Composable (PopupPlacement) -> Unit,
) {
    val transition = remember { MutableTransitionState(false) }
    transition.targetState = expanded
    if (!transition.currentState && !transition.targetState) return

    val density = LocalDensity.current
    val imeBottom = WindowInsets.ime.getBottom(density)
    val containerHeight = LocalWindowInfo.current.containerSize.height
    val bottomLimit = if (containerHeight > 0) containerHeight - imeBottom else Int.MAX_VALUE
    val placement = remember { PopupPlacement() }
    val provider = remember(side, align, sideOffset, alignOffset, point, bottomLimit, density) {
        with(density) {
            AnchoredPositionProvider(
                side = side,
                align = align,
                sideOffset = sideOffset.roundToPx(),
                alignOffset = alignOffset.roundToPx(),
                inset = PopupInset.roundToPx(),
                margin = PopupMargin.roundToPx(),
                bottomLimit = bottomLimit,
                point = point,
                placement = placement,
            )
        }
    }
    val currentExpanded by rememberUpdatedState(expanded)
    val dismiss by rememberUpdatedState(onDismissRequest)
    val properties = PopupProperties(
        focusable = focusable,
        dismissOnBackPress = true,
        dismissOnClickOutside = true,
    )
    val slide = with(density) { 8.dp.roundToPx() }
    val origin = transformOrigin(side)
    Popup(
        popupPositionProvider = provider,
        onDismissRequest = { if (currentExpanded) dismiss() },
        properties = properties,
    ) {
        Box(
            modifier = Modifier
                .pointerInput(Unit) {
                    val insetPx = PopupInset.toPx()
                    detectTapGestures { position ->
                        val inside = position.x >= insetPx && position.y >= insetPx &&
                            position.x <= size.width - insetPx && position.y <= size.height - insetPx
                        if (!inside && currentExpanded) dismiss()
                    }
                }
                .padding(PopupInset),
        ) {
            AnimatedVisibility(
                visibleState = transition,
                enter = scaleIn(tween(enterMillis), initialScale = 0.95f, transformOrigin = origin) +
                    slideIn(tween(enterMillis)) {
                        when (side) {
                            PopupSide.Bottom -> IntOffset(0, -slide)
                            PopupSide.Top -> IntOffset(0, slide)
                            PopupSide.Left -> IntOffset(slide, 0)
                            PopupSide.Right -> IntOffset(-slide, 0)
                        }
                    },
                exit = scaleOut(tween(exitMillis), targetScale = 0.95f, transformOrigin = origin),
            ) {
                Box(fadeWithShadow(enterMillis, exitMillis)) {
                    CompositionLocalProvider(LocalButtonGroup provides null) {
                        content(placement)
                    }
                }
            }
        }
    }
}

@Composable
internal fun ModalWindow(
    visible: Boolean,
    onDismissRequest: () -> Unit,
    dismissOnBackPress: Boolean,
    paneTitle: String?,
    content: @Composable () -> Unit,
) {
    if (!visible) return
    WindowDialog(
        onDismissRequest = onDismissRequest,
        properties = DialogProperties(
            dismissOnBackPress = dismissOnBackPress,
            dismissOnClickOutside = false,
            usePlatformDefaultWidth = false,
            decorFitsSystemWindows = false,
            windowTitle = paneTitle.orEmpty(),
        ),
    ) {
        val window = (LocalView.current.parent as? DialogWindowProvider)?.window
        SideEffect {
            window?.apply {
                setDimAmount(0f)
                clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND)
                setLayout(WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.MATCH_PARENT)
                val params = attributes
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
                    params.fitInsetsTypes = 0
                    params.fitInsetsSides = 0
                    params.layoutInDisplayCutoutMode = WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_ALWAYS
                } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
                    params.layoutInDisplayCutoutMode = WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES
                }
                attributes = params
                addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS)
                clearSystemBarColors()
            }
        }
        CompositionLocalProvider(LocalButtonGroup provides null, content = content)
    }
}

@Suppress("DEPRECATION")
private fun Window.clearSystemBarColors() {
    statusBarColor = android.graphics.Color.TRANSPARENT
    navigationBarColor = android.graphics.Color.TRANSPARENT
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
        isStatusBarContrastEnforced = false
        isNavigationBarContrastEnforced = false
    }
}

@Composable
internal fun AnimatedVisibilityScope.fadeWithShadow(enterMillis: Int, exitMillis: Int): Modifier {
    val alpha by transition.animateFloat(
        transitionSpec = { tween(if (targetState == EnterExitState.Visible) enterMillis else exitMillis) },
        label = "alpha",
    ) { if (it == EnterExitState.Visible) 1f else 0f }
    return Modifier.graphicsLayer {
        this.alpha = alpha
        compositingStrategy = CompositingStrategy.ModulateAlpha
    }
}

@Composable
internal fun Scrim(
    transition: MutableTransitionState<Boolean>,
    enterMillis: Int,
    exitMillis: Int,
    onClick: (() -> Unit)?,
) {
    val color = EsuissTheme.colors.scrim
    val click by rememberUpdatedState(onClick)
    AnimatedVisibility(
        visibleState = transition,
        enter = fadeIn(tween(enterMillis)),
        exit = fadeOut(tween(exitMillis)),
    ) {
        Box(
            modifier = Modifier
                .fillMaxSize()
                .background(color)
                .pointerInput(Unit) { detectTapGestures { click?.invoke() } },
        )
    }
}

@Stable
internal class PaneTitleState {
    var value by mutableStateOf<String?>(null)
}

internal val LocalPaneTitle = staticCompositionLocalOf<PaneTitleState?> { null }

@Composable
internal fun RegisterPaneTitle(text: String) {
    val state = LocalPaneTitle.current
    SideEffect { state?.value = text }
}

internal fun Modifier.raisedSurface(colors: Colors, shape: Shape, shadow: Shadow = Shadows.lg): Modifier =
    this
        .shadow(shadow, shape)
        .clip(shape)
        .background(colors.surfaceRaised, shape)
        .border(1.dp, colors.label.copy(alpha = if (colors.isDark) 0.1f else 0.05f), shape)

internal fun titleStyle(colors: Colors, style: TextStyle = Typography.base, centered: Boolean = false): TextStyle =
    style.copy(
        color = colors.label,
        fontWeight = FontWeight.SemiBold,
        textAlign = if (centered) TextAlign.Center else TextAlign.Unspecified,
    )

internal fun descriptionStyle(colors: Colors, centered: Boolean = false): TextStyle =
    Typography.sm.copy(
        color = colors.labelSecondary,
        textAlign = if (centered) TextAlign.Center else TextAlign.Unspecified,
    )

@Composable
internal fun OverlayTitle(text: String, modifier: Modifier, style: TextStyle) {
    RegisterPaneTitle(text)
    BasicText(text, modifier = modifier.semantics { heading() }, style = style)
}

@Composable
internal fun OverlayCloseButton(
    onClick: () -> Unit,
    label: String?,
    modifier: Modifier = Modifier,
) {
    val colors = EsuissTheme.colors
    if (label != null) {
        Button(onClick = onClick, modifier = modifier, variant = ButtonVariant.Plain, size = ButtonSize.Sm) {
            BasicText(label, style = Typography.base.copy(color = LocalContentColor.current), maxLines = 1)
        }
        return
    }
    val interaction = remember { MutableInteractionSource() }
    val pressed by interaction.collectIsPressedAsState()
    Box(
        modifier = modifier
            .size(44.dp)
            .clip(CircleShape)
            .clickable(interactionSource = interaction, indication = null, role = Role.Button, onClick = onClick)
            .semantics { contentDescription = "Close" },
        contentAlignment = Alignment.Center,
    ) {
        Box(
            modifier = Modifier
                .size(32.dp)
                .background(if (pressed) colors.separator else colors.surfaceTertiary, CircleShape),
            contentAlignment = Alignment.Center,
        ) {
            Icon(PhosphorIcons.Regular.X, contentDescription = null, size = 16.dp, tint = colors.label)
        }
    }
}

@Composable
internal fun rememberLongPressModifier(enabled: Boolean, onLongPress: (Offset) -> Unit): Modifier {
    val callback by rememberUpdatedState(onLongPress)
    if (!enabled) return Modifier
    return Modifier.pointerInput(Unit) {
        awaitEachGesture {
            val down = awaitFirstDown(requireUnconsumed = false, pass = PointerEventPass.Initial)
            val released = withTimeoutOrNull(viewConfiguration.longPressTimeoutMillis) {
                while (true) {
                    val event = awaitPointerEvent(PointerEventPass.Initial)
                    val change = event.changes.firstOrNull { it.id == down.id }
                    if (change == null || !change.pressed) break
                    if ((change.position - down.position).getDistance() > viewConfiguration.touchSlop) break
                }
                true
            }
            if (released == null) {
                callback(down.position)
                while (true) {
                    val event = awaitPointerEvent(PointerEventPass.Initial)
                    event.changes.forEach { it.consume() }
                    if (event.changes.none { it.pressed }) break
                }
            }
        }
    }
}
```

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

## Usage

```tsx
import { Sheet, SheetContent, SheetHeader, SheetFooter, SheetTitle, SheetDescription } from "@/components/ui/sheet"
```

```tsx
<View className="items-start">
  <Sheet defaultOpen>
    <SheetTrigger render={<Button variant="outline" />}>
      <Text>Open</Text>
    </SheetTrigger>
    <ProfileContent />
  </Sheet>
</View>
```

Wrap a `SheetTrigger` and a `SheetContent` in `Sheet`. Inside the content, compose `SheetHeader` with `SheetTitle` and `SheetDescription`, your body, and a `SheetFooter`, which is pushed to the bottom. Use `SheetTrigger` and `SheetClose` with `render` to turn a `Button` into a trigger or close control.

`Sheet` accepts `open`, `defaultOpen` and `onOpenChange` for controlled or uncontrolled use, plus `modal`, `disablePointerDismissal`, `onOpenChangeComplete` and `actionsRef`. The swipe direction follows the `side` of its content.

A close button is shown in the top corner by default. Set `closeLabel` to show a text button instead of the X icon, or `showCloseButton={false}` to remove it. `SheetHeader` adds end padding so the title does not run under the button.

## Examples

### Default

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

```tsx
import { View } from "react-native"
import { Button } from "@/components/ui/button"
import { Input } from "@/components/ui/input"
import { Label } from "@/components/ui/label"
import { Sheet, SheetClose, SheetContent, SheetDescription, SheetFooter, SheetHeader, SheetTitle, SheetTrigger } from "@/components/ui/sheet"
import { Text } from "@/components/ui/text"

type Side = "top" | "right" | "bottom" | "left"

function ProfileContent({ side }: { side?: Side }) {
  return (
    <SheetContent side={side}>
      <SheetHeader>
        <SheetTitle>Edit profile</SheetTitle>
        <SheetDescription>
          Make changes to your profile here. Tap save when you&apos;re done.
        </SheetDescription>
      </SheetHeader>
      <View className="gap-4 px-6">
        <View className="gap-2">
          <Label nativeID="sheet-name">Name</Label>
          <Input
            accessibilityLabelledBy="sheet-name"
            defaultValue="Pedro Duarte"
          />
        </View>
        <View className="gap-2">
          <Label nativeID="sheet-username">Username</Label>
          <Input
            accessibilityLabelledBy="sheet-username"
            defaultValue="@peduarte"
            autoCapitalize="none"
          />
        </View>
      </View>
      <SheetFooter>
        <Button>
          <Text>Save changes</Text>
        </Button>
        <SheetClose render={<Button variant="secondary" />}>
          <Text>Close</Text>
        </SheetClose>
      </SheetFooter>
    </SheetContent>
  )
}

export function SheetExample() {
  return (
    <View className="items-start">
      <Sheet>
        <SheetTrigger render={<Button variant="outline" />}>
          <Text>Open</Text>
        </SheetTrigger>
        <ProfileContent />
      </Sheet>
    </View>
  )
}
```

```swift
import EsuissUI
import SwiftUI

struct SheetExample: View {
  var body: some View {
    ProfileSheet(title: "Open", side: .trailing)
  }
}

struct ProfileSheet: View {
  let title: LocalizedStringKey
  let side: Edge

  @State private var open: Bool

  init(title: LocalizedStringKey, side: Edge, open: Bool = false) {
    self.title = title
    self.side = side
    _open = State(initialValue: open)
  }

  var body: some View {
    Button(title) { open = true }
      .buttonStyle(.variant(.outline))
      .sheet(isPresented: $open, side: side) {
        ProfileContent()
      }
  }
}

struct ProfileContent: View {
  @State private var name = "Pedro Duarte"
  @State private var username = "@peduarte"

  var body: some View {
    SheetContent {
      SheetHeader {
        SheetTitle("Edit profile")
        SheetDescription("Make changes to your profile here. Tap save when you're done.")
      }
      VStack(alignment: .leading, spacing: 16) {
        VStack(alignment: .leading, spacing: 8) {
          FieldLabel("Name")
            .accessibilityHidden(true)
          TextField("Name", text: $name)
            .textFieldStyle(.input)
        }
        VStack(alignment: .leading, spacing: 8) {
          FieldLabel("Username")
            .accessibilityHidden(true)
          TextField("Username", text: $username)
            .textFieldStyle(.input)
            .textInputAutocapitalization(.never)
        }
      }
      .padding(.horizontal, 24)
      SheetFooter {
        Button {} label: {
          Text("Save changes").frame(maxWidth: .infinity)
        }
        .buttonStyle(.variant())
        SheetClose {
          Text("Close").frame(maxWidth: .infinity)
        }
        .buttonStyle(.variant(.secondary))
      }
    }
  }
}
```

```kotlin
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
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.unit.dp
import com.esuiss.ui.components.Button
import com.esuiss.ui.components.ButtonVariant
import com.esuiss.ui.components.Input
import com.esuiss.ui.components.Label
import com.esuiss.ui.components.Sheet
import com.esuiss.ui.components.SheetDescription
import com.esuiss.ui.components.SheetFooter
import com.esuiss.ui.components.SheetHeader
import com.esuiss.ui.components.SheetSide
import com.esuiss.ui.components.SheetTitle

@Composable
fun SheetExample() {
    SheetDefault(defaultOpen = false)
}

@Composable
fun ProfileSheet(open: Boolean, onOpenChange: (Boolean) -> Unit, side: SheetSide = SheetSide.Right) {
    var name by rememberSaveable { mutableStateOf("Pedro Duarte") }
    var username by rememberSaveable { mutableStateOf("@peduarte") }
    Sheet(open = open, onOpenChange = onOpenChange, side = side) {
        SheetHeader {
            SheetTitle("Edit profile")
            SheetDescription("Make changes to your profile here. Tap save when you're done.")
        }
        Column(Modifier.padding(horizontal = 24.dp), verticalArrangement = Arrangement.spacedBy(16.dp)) {
            Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
                Label("Name")
                Input(name, { name = it }, Modifier.semantics { contentDescription = "Name" })
            }
            Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
                Label("Username")
                Input(
                    username,
                    { username = it },
                    Modifier.semantics { contentDescription = "Username" },
                    keyboardOptions = KeyboardOptions(capitalization = KeyboardCapitalization.None, autoCorrectEnabled = false),
                )
            }
        }
        SheetFooter {
            Button("Save changes", onClick = {}, modifier = Modifier.fillMaxWidth())
            Button("Close", onClick = { onOpenChange(false) }, modifier = Modifier.fillMaxWidth(), variant = ButtonVariant.Secondary)
        }
    }
}

@Composable
fun SheetDefault(defaultOpen: Boolean) {
    var open by rememberSaveable { mutableStateOf(defaultOpen) }
    Column {
        Button("Open", onClick = { open = true }, variant = ButtonVariant.Outline)
        ProfileSheet(open, { open = it })
    }
}
```

### Sides

One sheet for each side: `top`, `right`, `bottom` and `left`.

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

```tsx
import { View } from "react-native"
import { Button } from "@/components/ui/button"
import { Input } from "@/components/ui/input"
import { Label } from "@/components/ui/label"
import { Sheet, SheetClose, SheetContent, SheetDescription, SheetFooter, SheetHeader, SheetTitle, SheetTrigger } from "@/components/ui/sheet"
import { Text } from "@/components/ui/text"

type Side = "top" | "right" | "bottom" | "left"

function ProfileContent({ side }: { side?: Side }) {
  return (
    <SheetContent side={side}>
      <SheetHeader>
        <SheetTitle>Edit profile</SheetTitle>
        <SheetDescription>
          Make changes to your profile here. Tap save when you&apos;re done.
        </SheetDescription>
      </SheetHeader>
      <View className="gap-4 px-6">
        <View className="gap-2">
          <Label nativeID="sheet-name">Name</Label>
          <Input
            accessibilityLabelledBy="sheet-name"
            defaultValue="Pedro Duarte"
          />
        </View>
        <View className="gap-2">
          <Label nativeID="sheet-username">Username</Label>
          <Input
            accessibilityLabelledBy="sheet-username"
            defaultValue="@peduarte"
            autoCapitalize="none"
          />
        </View>
      </View>
      <SheetFooter>
        <Button>
          <Text>Save changes</Text>
        </Button>
        <SheetClose render={<Button variant="secondary" />}>
          <Text>Close</Text>
        </SheetClose>
      </SheetFooter>
    </SheetContent>
  )
}

export function SheetSidesExample() {
  return (
    <View className="items-start gap-3">
      {(["top", "right", "bottom", "left"] as const).map((side) => (
        <Sheet key={side}>
          <SheetTrigger render={<Button variant="outline" />}>
            <Text className="capitalize">{side}</Text>
          </SheetTrigger>
          <ProfileContent side={side} />
        </Sheet>
      ))}
    </View>
  )
}
```

```swift
import EsuissUI
import SwiftUI

struct SheetSidesExample: View {
  var body: some View {
    VStack(alignment: .leading, spacing: 12) {
      ProfileSheet(title: "Top", side: .top)
      ProfileSheet(title: "Right", side: .trailing)
      ProfileSheet(title: "Bottom", side: .bottom)
      ProfileSheet(title: "Left", side: .leading)
    }
  }
}

struct ProfileSheet: View {
  let title: LocalizedStringKey
  let side: Edge

  @State private var open: Bool

  init(title: LocalizedStringKey, side: Edge, open: Bool = false) {
    self.title = title
    self.side = side
    _open = State(initialValue: open)
  }

  var body: some View {
    Button(title) { open = true }
      .buttonStyle(.variant(.outline))
      .sheet(isPresented: $open, side: side) {
        ProfileContent()
      }
  }
}

struct ProfileContent: View {
  @State private var name = "Pedro Duarte"
  @State private var username = "@peduarte"

  var body: some View {
    SheetContent {
      SheetHeader {
        SheetTitle("Edit profile")
        SheetDescription("Make changes to your profile here. Tap save when you're done.")
      }
      VStack(alignment: .leading, spacing: 16) {
        VStack(alignment: .leading, spacing: 8) {
          FieldLabel("Name")
            .accessibilityHidden(true)
          TextField("Name", text: $name)
            .textFieldStyle(.input)
        }
        VStack(alignment: .leading, spacing: 8) {
          FieldLabel("Username")
            .accessibilityHidden(true)
          TextField("Username", text: $username)
            .textFieldStyle(.input)
            .textInputAutocapitalization(.never)
        }
      }
      .padding(.horizontal, 24)
      SheetFooter {
        Button {} label: {
          Text("Save changes").frame(maxWidth: .infinity)
        }
        .buttonStyle(.variant())
        SheetClose {
          Text("Close").frame(maxWidth: .infinity)
        }
        .buttonStyle(.variant(.secondary))
      }
    }
  }
}
```

```kotlin
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
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.unit.dp
import com.esuiss.ui.components.Button
import com.esuiss.ui.components.ButtonVariant
import com.esuiss.ui.components.Input
import com.esuiss.ui.components.Label
import com.esuiss.ui.components.Sheet
import com.esuiss.ui.components.SheetDescription
import com.esuiss.ui.components.SheetFooter
import com.esuiss.ui.components.SheetHeader
import com.esuiss.ui.components.SheetSide
import com.esuiss.ui.components.SheetTitle

@Composable
fun ProfileSheet(open: Boolean, onOpenChange: (Boolean) -> Unit, side: SheetSide = SheetSide.Right) {
    var name by rememberSaveable { mutableStateOf("Pedro Duarte") }
    var username by rememberSaveable { mutableStateOf("@peduarte") }
    Sheet(open = open, onOpenChange = onOpenChange, side = side) {
        SheetHeader {
            SheetTitle("Edit profile")
            SheetDescription("Make changes to your profile here. Tap save when you're done.")
        }
        Column(Modifier.padding(horizontal = 24.dp), verticalArrangement = Arrangement.spacedBy(16.dp)) {
            Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
                Label("Name")
                Input(name, { name = it }, Modifier.semantics { contentDescription = "Name" })
            }
            Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
                Label("Username")
                Input(
                    username,
                    { username = it },
                    Modifier.semantics { contentDescription = "Username" },
                    keyboardOptions = KeyboardOptions(capitalization = KeyboardCapitalization.None, autoCorrectEnabled = false),
                )
            }
        }
        SheetFooter {
            Button("Save changes", onClick = {}, modifier = Modifier.fillMaxWidth())
            Button("Close", onClick = { onOpenChange(false) }, modifier = Modifier.fillMaxWidth(), variant = ButtonVariant.Secondary)
        }
    }
}

@Composable
fun SheetSides() {
    Column(verticalArrangement = Arrangement.spacedBy(12.dp)) {
        SheetSide.entries.forEach { side ->
            var open by rememberSaveable(side.name) { mutableStateOf(false) }
            Button(side.name, onClick = { open = true }, variant = ButtonVariant.Outline)
            ProfileSheet(open, { open = it }, side)
        }
    }
}
```

### With close label

A bottom sheet whose close button reads "Done" instead of showing an icon.

![Preview](https://uim.suiss.app/previews/components-sheet--with-close-label.light.webp)

```tsx
import { View } from "react-native"
import { Button } from "@/components/ui/button"
import { Sheet, SheetContent, SheetDescription, SheetHeader, SheetTitle, SheetTrigger } from "@/components/ui/sheet"
import { Text } from "@/components/ui/text"

export function SheetWithCloseLabelExample() {
  return (
    <View className="items-start">
      <Sheet>
        <SheetTrigger render={<Button variant="outline" />}>
          <Text>Open with label</Text>
        </SheetTrigger>
        <SheetContent side="bottom" closeLabel="Done">
          <SheetHeader>
            <SheetTitle>Notifications</SheetTitle>
            <SheetDescription>
              Choose what you want to be notified about.
            </SheetDescription>
          </SheetHeader>
        </SheetContent>
      </Sheet>
    </View>
  )
}
```

```swift
import EsuissUI
import SwiftUI

struct CloseLabelSheet: View {
  @State private var open = false

  var body: some View {
    Button("Open with label") { open = true }
      .buttonStyle(.variant(.outline))
      .sheet(isPresented: $open, side: .bottom) {
        SheetContent(closeLabel: "Done") {
          SheetHeader {
            SheetTitle("Notifications")
            SheetDescription("Choose what you want to be notified about.")
          }
        }
      }
  }
}
```

```kotlin
import androidx.compose.foundation.layout.Column
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.Button
import com.esuiss.ui.components.ButtonVariant
import com.esuiss.ui.components.Sheet
import com.esuiss.ui.components.SheetDescription
import com.esuiss.ui.components.SheetHeader
import com.esuiss.ui.components.SheetSide
import com.esuiss.ui.components.SheetTitle

@Composable
fun SheetWithCloseLabel() {
    var open by rememberSaveable { mutableStateOf(false) }
    Column {
        Button("Open with label", onClick = { open = true }, variant = ButtonVariant.Outline)
        Sheet(open = open, onOpenChange = { open = it }, side = SheetSide.Bottom, closeLabel = "Done") {
            SheetHeader {
                SheetTitle("Notifications")
                SheetDescription("Choose what you want to be notified about.")
            }
        }
    }
}
```

## API Reference

### Sheet

Root that holds the open state.

### SheetContent

The panel, rendered in a portal with an overlay and an optional close button.

### SheetHeader

Column for the title and description.

### SheetFooter

Column of actions pushed to the bottom of the panel.

### SheetTitle

Heading that labels the sheet.

### SheetDescription

Secondary text under the title.

## Accessibility

- The panel has the `dialog` role and is labeled by `SheetTitle` when one is present.
- It is modal by default, so VoiceOver keeps focus inside the sheet.
- The VoiceOver escape gesture and the Android back button close the sheet.
- The icon-only close button has the accessibility label "Close".
- Animations respect the system reduce motion setting.

## Notes

- Uses `bg-surface-raised` for the panel and `bg-scrim` for the overlay; colors follow the system appearance.
- On iOS the sheet renders inside a `FullWindowOverlay` from `react-native-screens`, so it appears above native modals.
- Side sheets are three quarters of the screen width, capped at `max-w-sm` on larger screens.