# Login Passkey

A passkey sign-in screen with a face scan dialog and a welcome view after verifying.

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

Source: https://uim.suiss.app/docs/blocks/login-passkey

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

```tsx title="uniwind/components/blocks/login-passkey.tsx"
import { cn } from "cn"
import { CheckIcon, KeyIcon, ScanSmileyIcon } from "phosphor-react-native"
import * as React from "react"
import { Pressable, ScrollView, View } from "react-native"
import {
  cancelAnimation,
  FadeInDown,
  ReduceMotion,
  useAnimatedStyle,
  useSharedValue,
  withRepeat,
  withSequence,
  withSpring,
  withTiming,
} from "react-native-reanimated"
import { AnimatedView } from "@/components/ui/animated-view"
import { Avatar, AvatarFallback } from "@/components/ui/avatar"
import { Button } from "@/components/ui/button"
import {
  Dialog,
  DialogClose,
  DialogContent,
  DialogDescription,
  DialogTitle,
} from "@/components/ui/dialog"
import { Icon } from "@/components/ui/icon"
import { Screen } from "@/components/ui/screen"
import { Text } from "@/components/ui/text"

type Status = "idle" | "scan" | "ok" | "done"

function LinkText({
  onPress,
  className,
  children,
}: {
  onPress?: () => void
  className?: string
  children: React.ReactNode
}) {
  return (
    <Pressable
      role="link"
      hitSlop={8}
      onPress={onPress}
      className="active:opacity-60"
    >
      <Text className={cn("text-link", className)}>{children}</Text>
    </Pressable>
  )
}

function ScanGlyph({ verified }: { verified: boolean }) {
  const pulse = useSharedValue(1)
  const check = useSharedValue(0)

  React.useEffect(() => {
    if (verified) {
      cancelAnimation(pulse)
      pulse.value = withTiming(0, {
        duration: 300,
        reduceMotion: ReduceMotion.System,
      })
      check.value = withSpring(1, {
        damping: 12,
        reduceMotion: ReduceMotion.System,
      })
      return
    }
    check.value = 0
    pulse.value = withRepeat(
      withSequence(
        withTiming(0.4, { duration: 600 }),
        withTiming(1, { duration: 600 })
      ),
      -1,
      false,
      undefined,
      ReduceMotion.System
    )
    return () => cancelAnimation(pulse)
  }, [verified, pulse, check])

  const glyphStyle = useAnimatedStyle(() => ({
    opacity: pulse.value,
    transform: [{ scale: 0.6 + pulse.value * 0.4 }],
  }))

  const checkStyle = useAnimatedStyle(() => ({
    opacity: check.value,
    transform: [{ scale: 0.4 + check.value * 0.6 }],
  }))

  return (
    <View className="size-18">
      <AnimatedView
        style={glyphStyle}
        className="absolute inset-0 items-center justify-center"
      >
        <Icon as={ScanSmileyIcon} weight="light" className="size-18" />
      </AnimatedView>
      <AnimatedView
        style={checkStyle}
        className="absolute inset-1.5 items-center justify-center rounded-full bg-success"
      >
        <Icon as={CheckIcon} weight="bold" className="size-8 text-on-accent" />
      </AnimatedView>
    </View>
  )
}

function LoginPasskey({
  onChangeAccount,
  onUsePassword,
  onContinue,
}: {
  onChangeAccount?: () => void
  onUsePassword?: () => void
  onContinue?: () => void
}) {
  const [status, setStatus] = React.useState<Status>("idle")

  React.useEffect(() => {
    if (status !== "scan" && status !== "ok") return
    const timer = setTimeout(
      () => setStatus(status === "scan" ? "ok" : "done"),
      status === "scan" ? 1500 : 900
    )
    return () => clearTimeout(timer)
  }, [status])

  if (status === "done") {
    return (
      <Screen>
        <View className="flex-1 items-center justify-center p-6">
          <AnimatedView
            entering={FadeInDown.duration(600).reduceMotion(
              ReduceMotion.System
            )}
            className="items-center gap-3.5"
          >
            <Avatar size="xl" className="size-21">
              <AvatarFallback className="bg-indigo dark:bg-indigo">
                <Text className="text-3xl">JR</Text>
              </AvatarFallback>
            </Avatar>
            <Text role="heading" className="text-center text-3xl font-semibold">
              Welcome, Jamie.
            </Text>
            <Text className="text-center text-lg text-label-secondary">
              You signed in with a passkey. No password needed.
            </Text>
            <LinkText className="text-lg" onPress={() => setStatus("idle")}>
              Sign out ›
            </LinkText>
          </AnimatedView>
        </View>
      </Screen>
    )
  }

  return (
    <Screen>
      <ScrollView contentContainerClassName="grow items-center justify-center px-6 py-8">
        <View className="size-18 items-center justify-center rounded-full bg-surface-secondary">
          <Icon as={KeyIcon} weight="bold" className="size-8.5 text-accent" />
        </View>
        <Text
          role="heading"
          className="mt-5.5 text-center text-3xl font-semibold"
        >
          Sign in without a password.
        </Text>
        <Text className="mt-3 text-center text-xl text-label-secondary">
          With a passkey, your face or fingerprint is all it takes. Nothing to
          remember, nothing to type.
        </Text>
        <View className="mt-7 flex-row items-center gap-2.5 rounded-full bg-surface-secondary py-2 ps-2 pe-4">
          <Avatar size="sm" className="size-7">
            <AvatarFallback className="bg-indigo dark:bg-indigo">
              JR
            </AvatarFallback>
          </Avatar>
          <Text className="shrink text-base" numberOfLines={1}>
            jamie@suiss.com
          </Text>
          <LinkText className="text-sm" onPress={onChangeAccount}>
            Change ›
          </LinkText>
        </View>
        <Button
          size="lg"
          onPress={() => {
            onContinue?.()
            setStatus("scan")
          }}
          className="mt-5.5"
        >
          <Icon as={ScanSmileyIcon} className="size-4.5 text-on-accent" />
          <Text>Continue with passkey</Text>
        </Button>
        <View className="mt-4.5">
          <LinkText className="text-sm" onPress={onUsePassword}>
            Sign in with password ›
          </LinkText>
        </View>
        <Text className="mt-10 text-center text-xs text-label-secondary">
          Passkeys are end-to-end encrypted and sync across all your devices
          with suiss Keychain.
        </Text>
      </ScrollView>
      <Dialog
        open={status === "scan" || status === "ok"}
        onOpenChange={(open) => {
          if (!open) setStatus("idle")
        }}
      >
        <DialogContent
          showCloseButton={false}
          className="w-65 items-center gap-3.5 self-center rounded-3xl px-6 pt-7.5 pb-4.5"
        >
          <ScanGlyph verified={status === "ok"} />
          <View className="items-center gap-0.75">
            <DialogTitle className="text-center text-lg font-semibold">
              {status === "ok" ? "Verified" : "Face scan"}
            </DialogTitle>
            <DialogDescription className="text-center text-sm text-label-secondary">
              Passkey for suiss.com
            </DialogDescription>
          </View>
          <DialogClose
            disabled={status === "ok"}
            render={
              <Button
                variant="plain"
                className={cn(status === "ok" && "opacity-0")}
              />
            }
          >
            <Text className="text-base">Cancel</Text>
          </DialogClose>
        </DialogContent>
      </Dialog>
    </Screen>
  )
}

export { LoginPasskey }
```

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

public struct LoginPasskey: View {
  enum Status: Sendable {
    case idle, scan, ok, done
  }

  private var onChangeAccount: (() -> Void)?
  private var onUsePassword: (() -> Void)?
  private var onContinue: (() -> Void)?
  @State private var status: Status
  @State private var task: Task<Void, Never>?
  @Environment(\.accessibilityReduceMotion) private var reduceMotion

  public init(
    onContinue: (() -> Void)? = nil,
    onChangeAccount: (() -> Void)? = nil,
    onUsePassword: (() -> Void)? = nil
  ) {
    self.init(status: .idle)
    self.onContinue = onContinue
    self.onChangeAccount = onChangeAccount
    self.onUsePassword = onUsePassword
  }

  init(status: Status) {
    _status = State(initialValue: status)
  }

  public var body: some View {
    Screen {
      if status == .done {
        welcome
          .transition(.opacity.combined(with: .offset(y: 18)))
      } else {
        intro
      }
    }
    .animation(reduceMotion ? nil : .timingCurve(0.32, 0.72, 0, 1, duration: 0.6), value: status == .done)
    .dialog(isPresented: scanning) {
      LoginPasskeyScan(verified: status == .ok, onCancel: cancel)
    }
    .onDisappear { task?.cancel() }
  }

  private var scanning: Binding<Bool> {
    Binding(
      get: { status == .scan || status == .ok },
      set: { if !$0 { cancel() } }
    )
  }

  private var intro: some View {
    VStack(spacing: 0) {
      KeyboardScrollView {
        VStack(spacing: 0) {
          Ph.key.bold
            .frame(width: 34, height: 34)
            .foregroundStyle(Color.accent)
            .frame(width: 72, height: 72)
            .background(Color.surfaceSecondary, in: Circle())
            .accessibilityHidden(true)
          Text("Sign in without a password.")
            .scaledTextStyle(.xl2, weight: .bold)
            .padding(.top, 22)
          Text("With a passkey, your face or fingerprint is all it takes. Nothing to remember, nothing to type.")
            .scaledTextStyle(.lg)
            .foregroundStyle(Color.labelSecondary)
            .padding(.top, 12)
          account
            .padding(.top, 28)
          Button(action: start) {
            Label {
              Text("Continue with passkey")
            } icon: {
              Ph.scanSmiley.regular
            }
          }
          .buttonStyle(.variant(.default, size: .lg))
          .padding(.top, 22)
          Button("Sign in with password ›") { onUsePassword?() }
            .buttonStyle(LoginPasskeyLinkStyle())
            .padding(.top, 10)
          Text("Passkeys are end-to-end encrypted and sync across all your devices with suiss Keychain.")
            .scaledTextStyle(.xs2)
            .foregroundStyle(Color.labelSecondary)
            .padding(.top, 40)
        }
        .multilineTextAlignment(.center)
        .fixedSize(horizontal: false, vertical: true)
        .frame(maxWidth: .infinity)
        .padding(.horizontal, 24)
        .padding(.top, 72)
        .padding(.bottom, 24)
      }
    }
  }

  private var account: some View {
    HStack(spacing: 10) {
      Avatar(size: .sm) {
        LoginPasskeyInitials(style: .xs3)
      }
      .frame(width: 28, height: 28)
      Text(verbatim: "jamie@suiss.com")
        .scaledFont(.base)
        .foregroundStyle(Color.label)
        .lineLimit(1)
      Button("Change ›") { onChangeAccount?() }
        .buttonStyle(LoginPasskeyLinkStyle())
    }
    .padding(.leading, 8)
    .padding(.trailing, 16)
    .padding(.vertical, 2)
    .background(Color.surfaceSecondary, in: Capsule())
  }

  private var welcome: some View {
    VStack(spacing: 14) {
      Avatar(size: .xl) {
        LoginPasskeyInitials(style: .xl2)
      }
      Text("Welcome, Jamie.")
        .scaledTextStyle(.xl3, weight: .bold)
      Text("You signed in with a passkey. No password needed.")
        .scaledTextStyle(.lg)
        .foregroundStyle(Color.labelSecondary)
      Button("Sign out ›") { status = .idle }
        .buttonStyle(LoginPasskeyLinkStyle(style: .lg))
    }
    .multilineTextAlignment(.center)
    .fixedSize(horizontal: false, vertical: true)
    .padding(24)
    .frame(maxWidth: .infinity, maxHeight: .infinity)
  }

  private func start() {
    onContinue?()
    status = .scan
    task?.cancel()
    task = Task {
      try? await Task.sleep(for: .milliseconds(1500))
      guard !Task.isCancelled else { return }
      status = .ok
      try? await Task.sleep(for: .milliseconds(900))
      guard !Task.isCancelled else { return }
      status = .done
    }
  }

  private func cancel() {
    task?.cancel()
    task = nil
    if status != .done { status = .idle }
  }
}

struct LoginPasskeyScan: View {
  let verified: Bool
  let onCancel: () -> Void

  var body: some View {
    DialogContent(showCloseButton: false) {
      VStack(spacing: 14) {
        LoginPasskeyGlyph(verified: verified)
        VStack(spacing: 3) {
          DialogTitle(verified ? "Verified" : "Face scan")
          DialogDescription("Passkey for suiss.com")
        }
        .multilineTextAlignment(.center)
        Button("Cancel", action: onCancel)
          .buttonStyle(.variant(.plain))
          .opacity(verified ? 0 : 1)
          .disabled(verified)
      }
      .frame(width: 212)
      .frame(maxWidth: .infinity)
    }
    .frame(width: 260)
  }
}

private struct LoginPasskeyGlyph: View {
  let verified: Bool

  @State private var pulse = false
  @Environment(\.accessibilityReduceMotion) private var reduceMotion

  var body: some View {
    ZStack {
      Ph.scanSmiley.light
        .foregroundStyle(Color.label)
        .opacity(verified ? 0 : pulse ? 0.5 : 1)
        .scaleEffect(verified ? 0.6 : 1)
      Ph.check.bold
        .frame(width: 32, height: 32)
        .foregroundStyle(Color.onAccent)
        .frame(width: 60, height: 60)
        .background(Color.success, in: Circle())
        .scaleEffect(verified ? 1 : 0.4)
        .opacity(verified ? 1 : 0)
    }
    .frame(width: 72, height: 72)
    .animation(reduceMotion ? nil : .spring(response: 0.55, dampingFraction: 0.6), value: verified)
    .onAppear {
      guard !reduceMotion else { return }
      withAnimation(.easeInOut(duration: 0.6).repeatForever(autoreverses: true)) { pulse = true }
    }
    .accessibilityHidden(true)
  }
}

private struct LoginPasskeyInitials: View {
  let style: TextStyle

  var body: some View {
    Text(verbatim: "JR")
      .scaledFont(style, weight: .semibold)
      .foregroundStyle(Color.onAccent)
      .frame(maxWidth: .infinity, maxHeight: .infinity)
      .background(
        Color.indigo,
        in: Circle()
      )
  }
}

private struct LoginPasskeyLinkStyle: ButtonStyle {
  var style: TextStyle = .sm

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

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

import androidx.compose.animation.core.Animatable
import androidx.compose.animation.core.CubicBezierEasing
import androidx.compose.animation.core.RepeatMode
import androidx.compose.animation.core.animateFloat
import androidx.compose.animation.core.animateFloatAsState
import androidx.compose.animation.core.infiniteRepeatable
import androidx.compose.animation.core.rememberInfiniteTransition
import androidx.compose.animation.core.tween
import androidx.compose.foundation.background
import androidx.compose.foundation.clickable
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.interaction.collectIsPressedAsState
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.BoxWithConstraints
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.heightIn
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.layout.width
import androidx.compose.foundation.layout.widthIn
import androidx.compose.foundation.rememberScrollState
import androidx.compose.foundation.shape.CircleShape
import androidx.compose.foundation.text.BasicText
import androidx.compose.foundation.verticalScroll
import androidx.compose.runtime.Composable
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.graphicsLayer
import androidx.compose.ui.semantics.Role
import androidx.compose.ui.semantics.heading
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Bold
import com.adamglin.phosphoricons.Light
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.bold.Check
import com.adamglin.phosphoricons.bold.Key
import com.adamglin.phosphoricons.light.ScanSmiley
import com.adamglin.phosphoricons.regular.ScanSmiley
import com.esuiss.ui.components.Avatar
import com.esuiss.ui.components.AvatarSize
import com.esuiss.ui.components.BottomBar
import com.esuiss.ui.components.BottomBarContent
import com.esuiss.ui.components.Button
import com.esuiss.ui.components.ButtonSize
import com.esuiss.ui.components.ButtonVariant
import com.esuiss.ui.components.Dialog
import com.esuiss.ui.components.DialogDescription
import com.esuiss.ui.components.DialogTitle
import com.esuiss.ui.components.Icon
import com.esuiss.ui.components.LocalContentStyle
import com.esuiss.ui.components.Screen
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography
import kotlinx.coroutines.delay

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

private val PopEasing = CubicBezierEasing(0.3f, 1.25f, 0.5f, 1f)

private enum class PasskeyStatus { Idle, Scan, Ok, Done }

@Composable
fun LoginPasskey(
    modifier: Modifier = Modifier,
    onContinue: () -> Unit = {},
    onChangeAccount: () -> Unit = {},
    onUsePassword: () -> Unit = {},
) {
    val colors = EsuissTheme.colors
    var status by rememberSaveable { mutableStateOf(PasskeyStatus.Idle) }

    LaunchedEffect(status) {
        when (status) {
            PasskeyStatus.Scan -> {
                delay(1500)
                status = PasskeyStatus.Ok
            }
            PasskeyStatus.Ok -> {
                delay(900)
                status = PasskeyStatus.Done
            }
            else -> Unit
        }
    }

    Screen(modifier) {
        if (status == PasskeyStatus.Done) {
            Welcome { status = PasskeyStatus.Idle }
            return@Screen
        }
        Column(Modifier.fillMaxSize()) {
            BoxWithConstraints(Modifier.weight(1f)) {
                val height = maxHeight
                Column(
                    modifier = Modifier
                        .fillMaxSize()
                        .verticalScroll(rememberScrollState()),
                ) {
                    Column(
                        modifier = Modifier
                            .fillMaxWidth()
                            .heightIn(min = height)
                            .padding(24.dp),
                        verticalArrangement = Arrangement.Center,
                        horizontalAlignment = Alignment.CenterHorizontally,
                    ) {
                        Box(
                            Modifier
                                .size(72.dp)
                                .background(colors.surfaceSecondary, CircleShape),
                            contentAlignment = Alignment.Center,
                        ) {
                            Icon(PhosphorIcons.Bold.Key, contentDescription = null, size = 34.dp, tint = colors.accent)
                        }
                        Spacer(Modifier.height(22.dp))
                        BasicText(
                            "Sign in without a password.",
                            modifier = Modifier.semantics { heading() },
                            style = Typography.xl3.copy(
                                color = colors.label,
                                fontWeight = FontWeight.SemiBold,
                                textAlign = TextAlign.Center,
                            ),
                        )
                        Spacer(Modifier.height(12.dp))
                        BasicText(
                            "With a passkey, your face or fingerprint is all it takes. Nothing to remember, nothing to type.",
                            modifier = Modifier.widthIn(max = 480.dp),
                            style = Typography.lg.copy(color = colors.labelSecondary, textAlign = TextAlign.Center),
                        )
                        Spacer(Modifier.height(28.dp))
                        AccountPill(onChangeAccount)
                        Spacer(Modifier.height(40.dp))
                        BasicText(
                            "Passkeys are end-to-end encrypted and sync across all your devices with suiss Keychain.",
                            modifier = Modifier.widthIn(max = 420.dp),
                            style = Typography.xs.copy(color = colors.labelSecondary, textAlign = TextAlign.Center),
                        )
                    }
                }
            }
            BottomBar {
                BottomBarContent {
                    Button(
                        onClick = {
                            onContinue()
                            status = PasskeyStatus.Scan
                        },
                        size = ButtonSize.Lg,
                        block = true,
                    ) {
                        Icon(PhosphorIcons.Regular.ScanSmiley, contentDescription = null, size = 18.dp)
                        BasicText("Continue with passkey", style = LocalContentStyle.current)
                    }
                    Button("Sign in with password ›", onUsePassword, variant = ButtonVariant.Plain)
                }
            }
        }
        val scanning = status == PasskeyStatus.Scan || status == PasskeyStatus.Ok
        Dialog(
            open = scanning,
            onOpenChange = { if (!it) status = PasskeyStatus.Idle },
            modifier = Modifier.width(260.dp),
            showCloseButton = false,
        ) {
            Column(
                modifier = Modifier.fillMaxWidth(),
                horizontalAlignment = Alignment.CenterHorizontally,
                verticalArrangement = Arrangement.spacedBy(14.dp),
            ) {
                ScanGlyph(verified = status == PasskeyStatus.Ok)
                Column(
                    horizontalAlignment = Alignment.CenterHorizontally,
                    verticalArrangement = Arrangement.spacedBy(3.dp),
                ) {
                    DialogTitle(if (status == PasskeyStatus.Ok) "Verified" else "Face scan")
                    DialogDescription("Passkey for suiss.com")
                }
                Button(
                    "Cancel",
                    { status = PasskeyStatus.Idle },
                    modifier = Modifier.graphicsLayer { alpha = if (status == PasskeyStatus.Ok) 0f else 1f },
                    variant = ButtonVariant.Plain,
                    enabled = status != PasskeyStatus.Ok,
                )
            }
        }
    }
}

@Composable
private fun AccountPill(onChange: () -> Unit) {
    val colors = EsuissTheme.colors
    val interaction = remember { MutableInteractionSource() }
    val pressed by interaction.collectIsPressedAsState()
    Row(
        modifier = Modifier
            .background(colors.surfaceSecondary, CircleShape)
            .padding(start = 8.dp, end = 16.dp, top = 8.dp, bottom = 8.dp),
        horizontalArrangement = Arrangement.spacedBy(10.dp),
        verticalAlignment = Alignment.CenterVertically,
    ) {
        GradientAvatar("JR", Modifier.size(28.dp), AvatarSize.Sm)
        BasicText("jamie@suiss.com", style = Typography.base.copy(color = colors.label))
        BasicText(
            "Change ›",
            modifier = Modifier
                .graphicsLayer { alpha = if (pressed) 0.5f else 1f }
                .clickable(interactionSource = interaction, indication = null, role = Role.Button, onClick = onChange),
            style = Typography.sm.copy(color = colors.link),
        )
    }
}

@Composable
private fun GradientAvatar(initials: String, modifier: Modifier, size: AvatarSize) {
    val colors = EsuissTheme.colors
    Avatar(
        modifier = modifier,
        size = size,
        fallback = {
            Box(
                Modifier
                    .fillMaxSize()
                    .background(colors.indigo, CircleShape),
                contentAlignment = Alignment.Center,
            ) {
                BasicText(
                    initials,
                    style = (if (size == AvatarSize.Sm) Typography.xs3 else Typography.xl3).copy(
                        color = colors.onAccent,
                        fontWeight = FontWeight.SemiBold,
                    ),
                )
            }
        },
    )
}

@Composable
private fun ScanGlyph(verified: Boolean) {
    val colors = EsuissTheme.colors
    val pulse = rememberInfiniteTransition(label = "pulse")
    val breathe by pulse.animateFloat(
        initialValue = 1f,
        targetValue = 0.5f,
        animationSpec = infiniteRepeatable(tween(600), RepeatMode.Reverse),
        label = "breathe",
    )
    val glyph by animateFloatAsState(if (verified) 0f else 1f, tween(500), label = "glyph")
    val check by animateFloatAsState(if (verified) 1f else 0f, tween(550, easing = PopEasing), label = "check")
    Box(Modifier.size(72.dp), contentAlignment = Alignment.Center) {
        Icon(
            PhosphorIcons.Light.ScanSmiley,
            contentDescription = null,
            modifier = Modifier.graphicsLayer {
                alpha = glyph * (if (verified) 1f else breathe)
                val scale = 0.6f + 0.4f * glyph
                scaleX = scale
                scaleY = scale
            },
            size = 72.dp,
            tint = colors.label,
        )
        Box(
            Modifier
                .size(60.dp)
                .graphicsLayer {
                    alpha = check.coerceIn(0f, 1f)
                    val scale = 0.4f + 0.6f * check
                    scaleX = scale
                    scaleY = scale
                }
                .background(colors.success, CircleShape),
            contentAlignment = Alignment.Center,
        ) {
            Icon(PhosphorIcons.Bold.Check, contentDescription = null, size = 32.dp, tint = colors.onAccent)
        }
    }
}

@Composable
private fun Welcome(onSignOut: () -> Unit) {
    val colors = EsuissTheme.colors
    val appear = remember { Animatable(0f) }
    LaunchedEffect(Unit) { appear.animateTo(1f, tween(1000, easing = RevealEasing)) }
    val interaction = remember { MutableInteractionSource() }
    val pressed by interaction.collectIsPressedAsState()
    Column(
        modifier = Modifier
            .fillMaxSize()
            .padding(24.dp)
            .graphicsLayer {
                alpha = appear.value
                translationY = (1f - appear.value) * 18.dp.toPx()
            },
        verticalArrangement = Arrangement.spacedBy(14.dp, Alignment.CenterVertically),
        horizontalAlignment = Alignment.CenterHorizontally,
    ) {
        GradientAvatar("JR", Modifier.size(84.dp), AvatarSize.Xl)
        BasicText(
            "Welcome, Jamie.",
            modifier = Modifier.semantics { heading() },
            style = Typography.xl3.copy(color = colors.label, fontWeight = FontWeight.SemiBold, textAlign = TextAlign.Center),
        )
        BasicText(
            "You signed in with a passkey. No password needed.",
            style = Typography.lg.copy(color = colors.labelSecondary, textAlign = TextAlign.Center),
        )
        BasicText(
            "Sign out ›",
            modifier = Modifier
                .graphicsLayer { alpha = if (pressed) 0.5f else 1f }
                .clickable(interactionSource = interaction, indication = null, role = Role.Button, onClick = onSignOut),
            style = Typography.lg.copy(color = colors.link),
        )
    }
}
```

A sign-in screen that shows the account with an `Avatar`, a Change link, a Continue with passkey `Button` and a link to sign in with a password. Continuing opens a `Dialog` with an animated scan glyph that turns into a verified state, then shows a welcome view with a Sign out link. The dialog can be cancelled during the scan.

## Installation

```bash title="Terminal"
npx @esuiss/uim@latest add login-passkey
```

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

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

The CLI also adds what it builds on: [Avatar](/docs/components/avatar), [Button](/docs/components/button), [Dialog](/docs/components/dialog), [Icon](/docs/components/icon), [Screen](/docs/components/screen), [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-svg react-native-worklets
```

2. Add the pieces it builds on: [Avatar](/docs/components/avatar), [Button](/docs/components/button), [Dialog](/docs/components/dialog), [Icon](/docs/components/icon), [Screen](/docs/components/screen), [Text](/docs/components/text).

3. Copy the source into `components/blocks/login-passkey.tsx`:

```tsx title="uniwind/components/blocks/login-passkey.tsx"
import { cn } from "cn"
import { CheckIcon, KeyIcon, ScanSmileyIcon } from "phosphor-react-native"
import * as React from "react"
import { Pressable, ScrollView, View } from "react-native"
import {
  cancelAnimation,
  FadeInDown,
  ReduceMotion,
  useAnimatedStyle,
  useSharedValue,
  withRepeat,
  withSequence,
  withSpring,
  withTiming,
} from "react-native-reanimated"
import { AnimatedView } from "@/components/ui/animated-view"
import { Avatar, AvatarFallback } from "@/components/ui/avatar"
import { Button } from "@/components/ui/button"
import {
  Dialog,
  DialogClose,
  DialogContent,
  DialogDescription,
  DialogTitle,
} from "@/components/ui/dialog"
import { Icon } from "@/components/ui/icon"
import { Screen } from "@/components/ui/screen"
import { Text } from "@/components/ui/text"

type Status = "idle" | "scan" | "ok" | "done"

function LinkText({
  onPress,
  className,
  children,
}: {
  onPress?: () => void
  className?: string
  children: React.ReactNode
}) {
  return (
    <Pressable
      role="link"
      hitSlop={8}
      onPress={onPress}
      className="active:opacity-60"
    >
      <Text className={cn("text-link", className)}>{children}</Text>
    </Pressable>
  )
}

function ScanGlyph({ verified }: { verified: boolean }) {
  const pulse = useSharedValue(1)
  const check = useSharedValue(0)

  React.useEffect(() => {
    if (verified) {
      cancelAnimation(pulse)
      pulse.value = withTiming(0, {
        duration: 300,
        reduceMotion: ReduceMotion.System,
      })
      check.value = withSpring(1, {
        damping: 12,
        reduceMotion: ReduceMotion.System,
      })
      return
    }
    check.value = 0
    pulse.value = withRepeat(
      withSequence(
        withTiming(0.4, { duration: 600 }),
        withTiming(1, { duration: 600 })
      ),
      -1,
      false,
      undefined,
      ReduceMotion.System
    )
    return () => cancelAnimation(pulse)
  }, [verified, pulse, check])

  const glyphStyle = useAnimatedStyle(() => ({
    opacity: pulse.value,
    transform: [{ scale: 0.6 + pulse.value * 0.4 }],
  }))

  const checkStyle = useAnimatedStyle(() => ({
    opacity: check.value,
    transform: [{ scale: 0.4 + check.value * 0.6 }],
  }))

  return (
    <View className="size-18">
      <AnimatedView
        style={glyphStyle}
        className="absolute inset-0 items-center justify-center"
      >
        <Icon as={ScanSmileyIcon} weight="light" className="size-18" />
      </AnimatedView>
      <AnimatedView
        style={checkStyle}
        className="absolute inset-1.5 items-center justify-center rounded-full bg-success"
      >
        <Icon as={CheckIcon} weight="bold" className="size-8 text-on-accent" />
      </AnimatedView>
    </View>
  )
}

function LoginPasskey({
  onChangeAccount,
  onUsePassword,
  onContinue,
}: {
  onChangeAccount?: () => void
  onUsePassword?: () => void
  onContinue?: () => void
}) {
  const [status, setStatus] = React.useState<Status>("idle")

  React.useEffect(() => {
    if (status !== "scan" && status !== "ok") return
    const timer = setTimeout(
      () => setStatus(status === "scan" ? "ok" : "done"),
      status === "scan" ? 1500 : 900
    )
    return () => clearTimeout(timer)
  }, [status])

  if (status === "done") {
    return (
      <Screen>
        <View className="flex-1 items-center justify-center p-6">
          <AnimatedView
            entering={FadeInDown.duration(600).reduceMotion(
              ReduceMotion.System
            )}
            className="items-center gap-3.5"
          >
            <Avatar size="xl" className="size-21">
              <AvatarFallback className="bg-indigo dark:bg-indigo">
                <Text className="text-3xl">JR</Text>
              </AvatarFallback>
            </Avatar>
            <Text role="heading" className="text-center text-3xl font-semibold">
              Welcome, Jamie.
            </Text>
            <Text className="text-center text-lg text-label-secondary">
              You signed in with a passkey. No password needed.
            </Text>
            <LinkText className="text-lg" onPress={() => setStatus("idle")}>
              Sign out ›
            </LinkText>
          </AnimatedView>
        </View>
      </Screen>
    )
  }

  return (
    <Screen>
      <ScrollView contentContainerClassName="grow items-center justify-center px-6 py-8">
        <View className="size-18 items-center justify-center rounded-full bg-surface-secondary">
          <Icon as={KeyIcon} weight="bold" className="size-8.5 text-accent" />
        </View>
        <Text
          role="heading"
          className="mt-5.5 text-center text-3xl font-semibold"
        >
          Sign in without a password.
        </Text>
        <Text className="mt-3 text-center text-xl text-label-secondary">
          With a passkey, your face or fingerprint is all it takes. Nothing to
          remember, nothing to type.
        </Text>
        <View className="mt-7 flex-row items-center gap-2.5 rounded-full bg-surface-secondary py-2 ps-2 pe-4">
          <Avatar size="sm" className="size-7">
            <AvatarFallback className="bg-indigo dark:bg-indigo">
              JR
            </AvatarFallback>
          </Avatar>
          <Text className="shrink text-base" numberOfLines={1}>
            jamie@suiss.com
          </Text>
          <LinkText className="text-sm" onPress={onChangeAccount}>
            Change ›
          </LinkText>
        </View>
        <Button
          size="lg"
          onPress={() => {
            onContinue?.()
            setStatus("scan")
          }}
          className="mt-5.5"
        >
          <Icon as={ScanSmileyIcon} className="size-4.5 text-on-accent" />
          <Text>Continue with passkey</Text>
        </Button>
        <View className="mt-4.5">
          <LinkText className="text-sm" onPress={onUsePassword}>
            Sign in with password ›
          </LinkText>
        </View>
        <Text className="mt-10 text-center text-xs text-label-secondary">
          Passkeys are end-to-end encrypted and sync across all your devices
          with suiss Keychain.
        </Text>
      </ScrollView>
      <Dialog
        open={status === "scan" || status === "ok"}
        onOpenChange={(open) => {
          if (!open) setStatus("idle")
        }}
      >
        <DialogContent
          showCloseButton={false}
          className="w-65 items-center gap-3.5 self-center rounded-3xl px-6 pt-7.5 pb-4.5"
        >
          <ScanGlyph verified={status === "ok"} />
          <View className="items-center gap-0.75">
            <DialogTitle className="text-center text-lg font-semibold">
              {status === "ok" ? "Verified" : "Face scan"}
            </DialogTitle>
            <DialogDescription className="text-center text-sm text-label-secondary">
              Passkey for suiss.com
            </DialogDescription>
          </View>
          <DialogClose
            disabled={status === "ok"}
            render={
              <Button
                variant="plain"
                className={cn(status === "ok" && "opacity-0")}
              />
            }
          >
            <Text className="text-base">Cancel</Text>
          </DialogClose>
        </DialogContent>
      </Dialog>
    </Screen>
  )
}

export { LoginPasskey }
```

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-svg react-native-worklets
```

2. Add the pieces it builds on: [Avatar](/docs/components/avatar), [Button](/docs/components/button), [Dialog](/docs/components/dialog), [Icon](/docs/components/icon), [Screen](/docs/components/screen), [Text](/docs/components/text).

3. Copy the source into `components/blocks/login-passkey.tsx`:

```tsx title="nativewind/components/blocks/login-passkey.tsx"
import { cn } from "cn"
import { CheckIcon, KeyIcon, ScanSmileyIcon } from "phosphor-react-native"
import * as React from "react"
import { Pressable, ScrollView, View } from "react-native"
import {
  cancelAnimation,
  FadeInDown,
  ReduceMotion,
  useAnimatedStyle,
  useSharedValue,
  withRepeat,
  withSequence,
  withSpring,
  withTiming,
} from "react-native-reanimated"
import { AnimatedView } from "@/components/ui/animated-view"
import { Avatar, AvatarFallback } from "@/components/ui/avatar"
import { Button } from "@/components/ui/button"
import {
  Dialog,
  DialogClose,
  DialogContent,
  DialogDescription,
  DialogTitle,
} from "@/components/ui/dialog"
import { Icon } from "@/components/ui/icon"
import { Screen } from "@/components/ui/screen"
import { Text } from "@/components/ui/text"

type Status = "idle" | "scan" | "ok" | "done"

function LinkText({
  onPress,
  className,
  children,
}: {
  onPress?: () => void
  className?: string
  children: React.ReactNode
}) {
  return (
    <Pressable
      role="link"
      hitSlop={8}
      onPress={onPress}
      className="active:opacity-60"
    >
      <Text className={cn("text-link", className)}>{children}</Text>
    </Pressable>
  )
}

function ScanGlyph({ verified }: { verified: boolean }) {
  const pulse = useSharedValue(1)
  const check = useSharedValue(0)

  React.useEffect(() => {
    if (verified) {
      cancelAnimation(pulse)
      pulse.value = withTiming(0, {
        duration: 300,
        reduceMotion: ReduceMotion.System,
      })
      check.value = withSpring(1, {
        damping: 12,
        reduceMotion: ReduceMotion.System,
      })
      return
    }
    check.value = 0
    pulse.value = withRepeat(
      withSequence(
        withTiming(0.4, { duration: 600 }),
        withTiming(1, { duration: 600 })
      ),
      -1,
      false,
      undefined,
      ReduceMotion.System
    )
    return () => cancelAnimation(pulse)
  }, [verified, pulse, check])

  const glyphStyle = useAnimatedStyle(() => ({
    opacity: pulse.value,
    transform: [{ scale: 0.6 + pulse.value * 0.4 }],
  }))

  const checkStyle = useAnimatedStyle(() => ({
    opacity: check.value,
    transform: [{ scale: 0.4 + check.value * 0.6 }],
  }))

  return (
    <View className="size-[4.5rem]">
      <AnimatedView
        style={glyphStyle}
        className="absolute inset-0 items-center justify-center"
      >
        <Icon as={ScanSmileyIcon} weight="light" className="size-[4.5rem]" />
      </AnimatedView>
      <AnimatedView
        style={checkStyle}
        className="absolute inset-1.5 items-center justify-center rounded-full bg-success"
      >
        <Icon as={CheckIcon} weight="bold" className="size-8 text-on-accent" />
      </AnimatedView>
    </View>
  )
}

function LoginPasskey({
  onChangeAccount,
  onUsePassword,
  onContinue,
}: {
  onChangeAccount?: () => void
  onUsePassword?: () => void
  onContinue?: () => void
}) {
  const [status, setStatus] = React.useState<Status>("idle")

  React.useEffect(() => {
    if (status !== "scan" && status !== "ok") return
    const timer = setTimeout(
      () => setStatus(status === "scan" ? "ok" : "done"),
      status === "scan" ? 1500 : 900
    )
    return () => clearTimeout(timer)
  }, [status])

  if (status === "done") {
    return (
      <Screen>
        <View className="flex-1 items-center justify-center p-6">
          <AnimatedView
            entering={FadeInDown.duration(600).reduceMotion(
              ReduceMotion.System
            )}
            className="items-center gap-3.5"
          >
            <Avatar size="xl" className="size-[5.25rem]">
              <AvatarFallback className="bg-indigo dark:bg-indigo">
                <Text className="text-3xl">JR</Text>
              </AvatarFallback>
            </Avatar>
            <Text role="heading" className="text-center text-3xl font-semibold">
              Welcome, Jamie.
            </Text>
            <Text className="text-center text-lg text-label-secondary">
              You signed in with a passkey. No password needed.
            </Text>
            <LinkText className="text-lg" onPress={() => setStatus("idle")}>
              Sign out ›
            </LinkText>
          </AnimatedView>
        </View>
      </Screen>
    )
  }

  return (
    <Screen>
      <ScrollView contentContainerClassName="grow items-center justify-center px-6 py-8">
        <View className="size-[4.5rem] items-center justify-center rounded-full bg-surface-secondary">
          <Icon
            as={KeyIcon}
            weight="bold"
            className="size-[2.125rem] text-accent"
          />
        </View>
        <Text
          role="heading"
          className="mt-[1.375rem] text-center text-3xl font-semibold"
        >
          Sign in without a password.
        </Text>
        <Text className="mt-3 text-center text-xl text-label-secondary">
          With a passkey, your face or fingerprint is all it takes. Nothing to
          remember, nothing to type.
        </Text>
        <View className="mt-7 flex-row items-center gap-2.5 rounded-full bg-surface-secondary py-2 ps-2 pe-4">
          <Avatar size="sm" className="size-7">
            <AvatarFallback className="bg-indigo dark:bg-indigo">
              JR
            </AvatarFallback>
          </Avatar>
          <Text className="shrink text-base" numberOfLines={1}>
            jamie@suiss.com
          </Text>
          <LinkText className="text-sm" onPress={onChangeAccount}>
            Change ›
          </LinkText>
        </View>
        <Button
          size="lg"
          onPress={() => {
            onContinue?.()
            setStatus("scan")
          }}
          className="mt-[1.375rem]"
        >
          <Icon
            as={ScanSmileyIcon}
            className="size-[1.125rem] text-on-accent"
          />
          <Text>Continue with passkey</Text>
        </Button>
        <View className="mt-[1.125rem]">
          <LinkText className="text-sm" onPress={onUsePassword}>
            Sign in with password ›
          </LinkText>
        </View>
        <Text className="mt-10 text-center text-xs text-label-secondary">
          Passkeys are end-to-end encrypted and sync across all your devices
          with suiss Keychain.
        </Text>
      </ScrollView>
      <Dialog
        open={status === "scan" || status === "ok"}
        onOpenChange={(open) => {
          if (!open) setStatus("idle")
        }}
      >
        <DialogContent
          showCloseButton={false}
          className="w-[16.25rem] items-center gap-3.5 self-center rounded-3xl px-6 pt-[1.875rem] pb-[1.125rem]"
        >
          <ScanGlyph verified={status === "ok"} />
          <View className="items-center gap-[0.1875rem]">
            <DialogTitle className="text-center text-lg font-semibold">
              {status === "ok" ? "Verified" : "Face scan"}
            </DialogTitle>
            <DialogDescription className="text-center text-sm text-label-secondary">
              Passkey for suiss.com
            </DialogDescription>
          </View>
          <DialogClose
            disabled={status === "ok"}
            render={
              <Button
                variant="plain"
                className={cn(status === "ok" && "opacity-0")}
              />
            }
          >
            <Text className="text-base">Cancel</Text>
          </DialogClose>
        </DialogContent>
      </Dialog>
    </Screen>
  )
}

export { LoginPasskey }
```

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-svg react-native-worklets
```

2. Add the pieces it builds on: [Avatar](/docs/components/avatar), [Button](/docs/components/button), [Dialog](/docs/components/dialog), [Icon](/docs/components/icon), [Screen](/docs/components/screen), [Text](/docs/components/text).

3. Copy the source into `components/blocks/login-passkey.tsx`:

```tsx title="stylesheet/components/blocks/login-passkey.tsx"
import { CheckIcon, KeyIcon, ScanSmileyIcon } from "phosphor-react-native"
import * as React from "react"
import {
  Pressable,
  ScrollView,
  StyleSheet,
  type TextStyle,
  View,
} from "react-native"
import {
  cancelAnimation,
  FadeInDown,
  ReduceMotion,
  useAnimatedStyle,
  useSharedValue,
  withRepeat,
  withSequence,
  withSpring,
  withTiming,
} from "react-native-reanimated"
import { AnimatedView } from "@/components/ui/animated-view"
import { Avatar, AvatarFallback } from "@/components/ui/avatar"
import { Button } from "@/components/ui/button"
import {
  Dialog,
  DialogClose,
  DialogContent,
  DialogDescription,
  DialogTitle,
} from "@/components/ui/dialog"
import { Icon } from "@/components/ui/icon"
import { Screen } from "@/components/ui/screen"
import { Text } from "@/components/ui/text"
import { fontSize, radius, useTheme } from "@/components/ui/theme"

type Status = "idle" | "scan" | "ok" | "done"

const styles = StyleSheet.create({
  center: {
    flex: 1,
    alignItems: "center",
    justifyContent: "center",
    padding: 24,
  },
  done: { alignItems: "center", gap: 14 },
  heading: { ...fontSize["3xl"], textAlign: "center", fontWeight: "600" },
  glyph: { width: 72, height: 72 },
  glyphLayer: {
    position: "absolute",
    top: 0,
    right: 0,
    bottom: 0,
    left: 0,
    alignItems: "center",
    justifyContent: "center",
  },
  check: {
    position: "absolute",
    top: 6,
    right: 6,
    bottom: 6,
    left: 6,
    alignItems: "center",
    justifyContent: "center",
    borderRadius: radius.full,
  },
  scroll: {
    flexGrow: 1,
    alignItems: "center",
    justifyContent: "center",
    paddingHorizontal: 24,
    paddingVertical: 32,
  },
  key: {
    width: 72,
    height: 72,
    alignItems: "center",
    justifyContent: "center",
    borderRadius: radius.full,
  },
  account: {
    marginTop: 28,
    flexDirection: "row",
    alignItems: "center",
    gap: 10,
    borderRadius: radius.full,
    paddingVertical: 8,
    paddingStart: 8,
    paddingEnd: 16,
  },
  dialog: {
    width: 260,
    alignItems: "center",
    gap: 14,
    alignSelf: "center",
    borderRadius: radius["3xl"],
    paddingHorizontal: 24,
    paddingTop: 30,
    paddingBottom: 18,
  },
})

function LinkText({
  onPress,
  style,
  children,
}: {
  onPress?: () => void
  style?: TextStyle
  children: React.ReactNode
}) {
  const { colors } = useTheme()
  return (
    <Pressable
      role="link"
      hitSlop={8}
      onPress={onPress}
      style={({ pressed }) => pressed && { opacity: 0.6 }}
    >
      <Text style={[{ color: colors.link }, style]}>{children}</Text>
    </Pressable>
  )
}

function ScanGlyph({ verified }: { verified: boolean }) {
  const { colors } = useTheme()
  const pulse = useSharedValue(1)
  const check = useSharedValue(0)

  React.useEffect(() => {
    if (verified) {
      cancelAnimation(pulse)
      pulse.value = withTiming(0, {
        duration: 300,
        reduceMotion: ReduceMotion.System,
      })
      check.value = withSpring(1, {
        damping: 12,
        reduceMotion: ReduceMotion.System,
      })
      return
    }
    check.value = 0
    pulse.value = withRepeat(
      withSequence(
        withTiming(0.4, { duration: 600 }),
        withTiming(1, { duration: 600 })
      ),
      -1,
      false,
      undefined,
      ReduceMotion.System
    )
    return () => cancelAnimation(pulse)
  }, [verified, pulse, check])

  const glyphStyle = useAnimatedStyle(() => ({
    opacity: pulse.value,
    transform: [{ scale: 0.6 + pulse.value * 0.4 }],
  }))

  const checkStyle = useAnimatedStyle(() => ({
    opacity: check.value,
    transform: [{ scale: 0.4 + check.value * 0.6 }],
  }))

  return (
    <View style={styles.glyph}>
      <AnimatedView style={[styles.glyphLayer, glyphStyle]}>
        <Icon as={ScanSmileyIcon} weight="light" size={72} />
      </AnimatedView>
      <AnimatedView
        style={[styles.check, { backgroundColor: colors.success }, checkStyle]}
      >
        <Icon as={CheckIcon} weight="bold" size={32} color={colors.onAccent} />
      </AnimatedView>
    </View>
  )
}

function LoginPasskey({
  onChangeAccount,
  onUsePassword,
  onContinue,
}: {
  onChangeAccount?: () => void
  onUsePassword?: () => void
  onContinue?: () => void
}) {
  const { colors } = useTheme()
  const [status, setStatus] = React.useState<Status>("idle")

  React.useEffect(() => {
    if (status !== "scan" && status !== "ok") return
    const timer = setTimeout(
      () => setStatus(status === "scan" ? "ok" : "done"),
      status === "scan" ? 1500 : 900
    )
    return () => clearTimeout(timer)
  }, [status])

  if (status === "done") {
    return (
      <Screen>
        <View style={styles.center}>
          <AnimatedView
            entering={FadeInDown.duration(600).reduceMotion(
              ReduceMotion.System
            )}
            style={styles.done}
          >
            <Avatar size="xl" style={{ width: 84, height: 84 }}>
              <AvatarFallback style={{ backgroundColor: colors.indigo }}>
                <Text style={fontSize["3xl"]}>JR</Text>
              </AvatarFallback>
            </Avatar>
            <Text role="heading" style={styles.heading}>
              Welcome, Jamie.
            </Text>
            <Text
              style={{
                ...fontSize.lg,
                textAlign: "center",
                color: colors.labelSecondary,
              }}
            >
              You signed in with a passkey. No password needed.
            </Text>
            <LinkText style={fontSize.lg} onPress={() => setStatus("idle")}>
              Sign out ›
            </LinkText>
          </AnimatedView>
        </View>
      </Screen>
    )
  }

  return (
    <Screen>
      <ScrollView contentContainerStyle={styles.scroll}>
        <View
          style={[styles.key, { backgroundColor: colors.surfaceSecondary }]}
        >
          <Icon as={KeyIcon} weight="bold" size={34} color={colors.accent} />
        </View>
        <Text role="heading" style={[styles.heading, { marginTop: 22 }]}>
          Sign in without a password.
        </Text>
        <Text
          style={{
            ...fontSize.xl,
            marginTop: 12,
            textAlign: "center",
            color: colors.labelSecondary,
          }}
        >
          With a passkey, your face or fingerprint is all it takes. Nothing to
          remember, nothing to type.
        </Text>
        <View
          style={[styles.account, { backgroundColor: colors.surfaceSecondary }]}
        >
          <Avatar size="sm" style={{ width: 28, height: 28 }}>
            <AvatarFallback style={{ backgroundColor: colors.indigo }}>
              JR
            </AvatarFallback>
          </Avatar>
          <Text style={{ ...fontSize.base, flexShrink: 1 }} numberOfLines={1}>
            jamie@suiss.com
          </Text>
          <LinkText style={fontSize.sm} onPress={onChangeAccount}>
            Change ›
          </LinkText>
        </View>
        <Button
          size="lg"
          onPress={() => {
            onContinue?.()
            setStatus("scan")
          }}
          style={{ marginTop: 22 }}
        >
          <Icon as={ScanSmileyIcon} size={18} color={colors.onAccent} />
          <Text>Continue with passkey</Text>
        </Button>
        <View style={{ marginTop: 18 }}>
          <LinkText style={fontSize.sm} onPress={onUsePassword}>
            Sign in with password ›
          </LinkText>
        </View>
        <Text
          style={{
            ...fontSize.xs,
            marginTop: 40,
            textAlign: "center",
            color: colors.labelSecondary,
          }}
        >
          Passkeys are end-to-end encrypted and sync across all your devices
          with suiss Keychain.
        </Text>
      </ScrollView>
      <Dialog
        open={status === "scan" || status === "ok"}
        onOpenChange={(open) => {
          if (!open) setStatus("idle")
        }}
      >
        <DialogContent showCloseButton={false} style={styles.dialog}>
          <ScanGlyph verified={status === "ok"} />
          <View style={{ alignItems: "center", gap: 3 }}>
            <DialogTitle
              style={{ ...fontSize.lg, textAlign: "center", fontWeight: "600" }}
            >
              {status === "ok" ? "Verified" : "Face scan"}
            </DialogTitle>
            <DialogDescription
              style={{
                ...fontSize.sm,
                textAlign: "center",
                color: colors.labelSecondary,
              }}
            >
              Passkey for suiss.com
            </DialogDescription>
          </View>
          <DialogClose
            disabled={status === "ok"}
            render={
              <Button
                variant="plain"
                style={status === "ok" ? { opacity: 0 } : undefined}
              />
            }
          >
            <Text style={fontSize.base}>Cancel</Text>
          </DialogClose>
        </DialogContent>
      </Dialog>
    </Screen>
  )
}

export { LoginPasskey }
```

4. Update the import paths to match your project.

**SwiftUI**

1. Target iOS 17 or later.

2. Add the Swift package to your app:

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

3. Copy the theme files every view uses:

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

4. Copy the source and every file it uses:

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

public struct LoginPasskey: View {
  enum Status: Sendable {
    case idle, scan, ok, done
  }

  private var onChangeAccount: (() -> Void)?
  private var onUsePassword: (() -> Void)?
  private var onContinue: (() -> Void)?
  @State private var status: Status
  @State private var task: Task<Void, Never>?
  @Environment(\.accessibilityReduceMotion) private var reduceMotion

  public init(
    onContinue: (() -> Void)? = nil,
    onChangeAccount: (() -> Void)? = nil,
    onUsePassword: (() -> Void)? = nil
  ) {
    self.init(status: .idle)
    self.onContinue = onContinue
    self.onChangeAccount = onChangeAccount
    self.onUsePassword = onUsePassword
  }

  init(status: Status) {
    _status = State(initialValue: status)
  }

  public var body: some View {
    Screen {
      if status == .done {
        welcome
          .transition(.opacity.combined(with: .offset(y: 18)))
      } else {
        intro
      }
    }
    .animation(reduceMotion ? nil : .timingCurve(0.32, 0.72, 0, 1, duration: 0.6), value: status == .done)
    .dialog(isPresented: scanning) {
      LoginPasskeyScan(verified: status == .ok, onCancel: cancel)
    }
    .onDisappear { task?.cancel() }
  }

  private var scanning: Binding<Bool> {
    Binding(
      get: { status == .scan || status == .ok },
      set: { if !$0 { cancel() } }
    )
  }

  private var intro: some View {
    VStack(spacing: 0) {
      KeyboardScrollView {
        VStack(spacing: 0) {
          Ph.key.bold
            .frame(width: 34, height: 34)
            .foregroundStyle(Color.accent)
            .frame(width: 72, height: 72)
            .background(Color.surfaceSecondary, in: Circle())
            .accessibilityHidden(true)
          Text("Sign in without a password.")
            .scaledTextStyle(.xl2, weight: .bold)
            .padding(.top, 22)
          Text("With a passkey, your face or fingerprint is all it takes. Nothing to remember, nothing to type.")
            .scaledTextStyle(.lg)
            .foregroundStyle(Color.labelSecondary)
            .padding(.top, 12)
          account
            .padding(.top, 28)
          Button(action: start) {
            Label {
              Text("Continue with passkey")
            } icon: {
              Ph.scanSmiley.regular
            }
          }
          .buttonStyle(.variant(.default, size: .lg))
          .padding(.top, 22)
          Button("Sign in with password ›") { onUsePassword?() }
            .buttonStyle(LoginPasskeyLinkStyle())
            .padding(.top, 10)
          Text("Passkeys are end-to-end encrypted and sync across all your devices with suiss Keychain.")
            .scaledTextStyle(.xs2)
            .foregroundStyle(Color.labelSecondary)
            .padding(.top, 40)
        }
        .multilineTextAlignment(.center)
        .fixedSize(horizontal: false, vertical: true)
        .frame(maxWidth: .infinity)
        .padding(.horizontal, 24)
        .padding(.top, 72)
        .padding(.bottom, 24)
      }
    }
  }

  private var account: some View {
    HStack(spacing: 10) {
      Avatar(size: .sm) {
        LoginPasskeyInitials(style: .xs3)
      }
      .frame(width: 28, height: 28)
      Text(verbatim: "jamie@suiss.com")
        .scaledFont(.base)
        .foregroundStyle(Color.label)
        .lineLimit(1)
      Button("Change ›") { onChangeAccount?() }
        .buttonStyle(LoginPasskeyLinkStyle())
    }
    .padding(.leading, 8)
    .padding(.trailing, 16)
    .padding(.vertical, 2)
    .background(Color.surfaceSecondary, in: Capsule())
  }

  private var welcome: some View {
    VStack(spacing: 14) {
      Avatar(size: .xl) {
        LoginPasskeyInitials(style: .xl2)
      }
      Text("Welcome, Jamie.")
        .scaledTextStyle(.xl3, weight: .bold)
      Text("You signed in with a passkey. No password needed.")
        .scaledTextStyle(.lg)
        .foregroundStyle(Color.labelSecondary)
      Button("Sign out ›") { status = .idle }
        .buttonStyle(LoginPasskeyLinkStyle(style: .lg))
    }
    .multilineTextAlignment(.center)
    .fixedSize(horizontal: false, vertical: true)
    .padding(24)
    .frame(maxWidth: .infinity, maxHeight: .infinity)
  }

  private func start() {
    onContinue?()
    status = .scan
    task?.cancel()
    task = Task {
      try? await Task.sleep(for: .milliseconds(1500))
      guard !Task.isCancelled else { return }
      status = .ok
      try? await Task.sleep(for: .milliseconds(900))
      guard !Task.isCancelled else { return }
      status = .done
    }
  }

  private func cancel() {
    task?.cancel()
    task = nil
    if status != .done { status = .idle }
  }
}

struct LoginPasskeyScan: View {
  let verified: Bool
  let onCancel: () -> Void

  var body: some View {
    DialogContent(showCloseButton: false) {
      VStack(spacing: 14) {
        LoginPasskeyGlyph(verified: verified)
        VStack(spacing: 3) {
          DialogTitle(verified ? "Verified" : "Face scan")
          DialogDescription("Passkey for suiss.com")
        }
        .multilineTextAlignment(.center)
        Button("Cancel", action: onCancel)
          .buttonStyle(.variant(.plain))
          .opacity(verified ? 0 : 1)
          .disabled(verified)
      }
      .frame(width: 212)
      .frame(maxWidth: .infinity)
    }
    .frame(width: 260)
  }
}

private struct LoginPasskeyGlyph: View {
  let verified: Bool

  @State private var pulse = false
  @Environment(\.accessibilityReduceMotion) private var reduceMotion

  var body: some View {
    ZStack {
      Ph.scanSmiley.light
        .foregroundStyle(Color.label)
        .opacity(verified ? 0 : pulse ? 0.5 : 1)
        .scaleEffect(verified ? 0.6 : 1)
      Ph.check.bold
        .frame(width: 32, height: 32)
        .foregroundStyle(Color.onAccent)
        .frame(width: 60, height: 60)
        .background(Color.success, in: Circle())
        .scaleEffect(verified ? 1 : 0.4)
        .opacity(verified ? 1 : 0)
    }
    .frame(width: 72, height: 72)
    .animation(reduceMotion ? nil : .spring(response: 0.55, dampingFraction: 0.6), value: verified)
    .onAppear {
      guard !reduceMotion else { return }
      withAnimation(.easeInOut(duration: 0.6).repeatForever(autoreverses: true)) { pulse = true }
    }
    .accessibilityHidden(true)
  }
}

private struct LoginPasskeyInitials: View {
  let style: TextStyle

  var body: some View {
    Text(verbatim: "JR")
      .scaledFont(style, weight: .semibold)
      .foregroundStyle(Color.onAccent)
      .frame(maxWidth: .infinity, maxHeight: .infinity)
      .background(
        Color.indigo,
        in: Circle()
      )
  }
}

private struct LoginPasskeyLinkStyle: ButtonStyle {
  var style: TextStyle = .sm

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

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

public enum AvatarSize: CaseIterable, Sendable {
  case sm, `default`, lg, xl

  var dimension: CGFloat {
    switch self {
    case .sm: 24
    case .default: 32
    case .lg: 40
    case .xl: 64
    }
  }

  var overlap: CGFloat {
    self == .xl ? 16 : 8
  }

  var textStyle: TextStyle {
    switch self {
    case .sm: .xs3
    case .default: .xs
    case .lg: .md
    case .xl: .xl2
    }
  }

  var fallbackIcon: CGFloat {
    switch self {
    case .sm: 14
    case .default: 20
    case .lg: 24
    case .xl: 40
    }
  }

  var badge: CGFloat {
    switch self {
    case .sm: 12
    case .default: 16
    case .lg: 18
    case .xl: 22
    }
  }

  var badgeIcon: CGFloat {
    switch self {
    case .sm: 0
    case .default: 8
    case .lg: 10
    case .xl: 12
    }
  }

  var countIcon: CGFloat {
    switch self {
    case .sm: 12
    case .default: 16
    case .lg: 20
    case .xl: 28
    }
  }
}

public struct Avatar<Content: View>: View {
  public typealias Size = AvatarSize

  let size: Size
  let content: Content

  @Environment(\.avatarGrouped) private var grouped

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

  public var body: some View {
    ZStack {
      content
    }
    .padding(grouped ? 2 : 0)
    .background {
      if grouped {
        Circle().fill(Color.surface)
      }
    }
    .frame(width: size.dimension, height: size.dimension)
    .environment(\.avatarSize, size)
    .environment(\.avatarGrouped, false)
    .accessibilityElement(children: .combine)
    .accessibilityAddTraits(.isImage)
    .layoutValue(key: AvatarOverlapKey.self, value: size.overlap)
  }
}

extension Avatar {
  public init<Fallback: View>(
    url: URL?,
    size: Size = .default,
    @ViewBuilder fallback: () -> Fallback
  ) where Content == TupleView<(AvatarFallback<Fallback>, AvatarImage)> {
    let fallback = fallback()
    self.init(size: size) {
      AvatarFallback { fallback }
      AvatarImage(url: url)
    }
  }

  public init(
    url: URL?,
    initials: String,
    size: Size = .default
  ) where Content == TupleView<(AvatarFallback<Text>, AvatarImage)> {
    self.init(size: size) {
      AvatarFallback(initials)
      AvatarImage(url: url)
    }
  }
}

public struct AvatarImage: View {
  enum Source {
    case url(URL?)
    case image(Image)
  }

  let source: Source

  public init(url: URL?) {
    source = .url(url)
  }

  public init(_ image: Image) {
    source = .image(image)
  }

  public var body: some View {
    Group {
      switch source {
      case .image(let image):
        image.resizable().scaledToFill()
      case .url(let url):
        AsyncImage(url: url) { phase in
          if let image = phase.image {
            image.resizable().scaledToFill()
          } else {
            Color.clear
          }
        }
      }
    }
    .frame(maxWidth: .infinity, maxHeight: .infinity)
    .clipShape(Circle())
  }
}

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

  @Environment(\.avatarSize) private var size
  @Environment(\.colorScheme) private var colorScheme

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

  public var body: some View {
    content
      .textCase(.uppercase)
      .scaledFont(size.textStyle, weight: .semibold)
      .lineLimit(1)
      .minimumScaleFactor(0.5)
      .foregroundStyle(Color.onAccent)
      .environment(\.avatarIconSize, size.fallbackIcon)
      .frame(maxWidth: .infinity, maxHeight: .infinity)
      .background(Color.labelSecondary.opacity(colorScheme == .dark ? 0.6 : 1), in: Circle())
  }
}

extension AvatarFallback where Content == Text {
  public init(_ initials: String) {
    self.init { Text(verbatim: initials) }
  }
}

extension AvatarFallback where Content == AvatarIcon {
  public init(icon: Image) {
    self.init { AvatarIcon(icon) }
  }
}

public struct AvatarIcon: View {
  let image: Image

  @Environment(\.avatarIconSize) private var size

  public init(_ image: Image) {
    self.image = image
  }

  public var body: some View {
    image
      .resizable()
      .scaledToFit()
      .frame(width: size, height: size)
  }
}

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

  @Environment(\.avatarSize) private var size

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

  public var body: some View {
    ZStack {
      Circle().fill(Color.surface)
      Circle().fill(Color.accent).padding(2)
      if size != .sm {
        content
          .foregroundStyle(Color.onAccent)
          .environment(\.avatarIconSize, size.badgeIcon)
      }
    }
    .frame(width: size.badge, height: size.badge)
    .offset(x: 2, y: 2)
    .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .bottomTrailing)
  }
}

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

extension AvatarBadge where Content == AvatarIcon {
  public init(icon: Image) {
    self.init { AvatarIcon(icon) }
  }
}

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

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

  public var body: some View {
    AvatarGroupLayout {
      content
    }
    .environment(\.avatarGrouped, true)
    .accessibilityElement(children: .contain)
  }
}

public struct AvatarGroupCount<Content: View>: View {
  let size: AvatarSize
  let content: Content

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

  public var body: some View {
    content
      .scaledFont(size.textStyle, weight: .semibold)
      .lineLimit(1)
      .minimumScaleFactor(0.5)
      .foregroundStyle(Color.label)
      .environment(\.avatarIconSize, size.countIcon)
      .frame(maxWidth: .infinity, maxHeight: .infinity)
      .background(Color.surfaceSecondary, in: Circle())
      .padding(2)
      .background(Color.surface, in: Circle())
      .frame(width: size.dimension, height: size.dimension)
      .environment(\.avatarGrouped, false)
      .layoutValue(key: AvatarOverlapKey.self, value: size.overlap)
  }
}

extension AvatarGroupCount where Content == Text {
  public init(_ count: String, size: AvatarSize = .default) {
    self.init(size: size) { Text(verbatim: count) }
  }
}

struct AvatarOverlapKey: LayoutValueKey {
  static let defaultValue: CGFloat = 8
}

struct AvatarGroupLayout: Layout {
  func sizeThatFits(proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) -> CGSize {
    var width: CGFloat = 0
    var height: CGFloat = 0
    for (index, subview) in subviews.enumerated() {
      let size = subview.sizeThatFits(.unspecified)
      width += size.width - (index > 0 ? subview[AvatarOverlapKey.self] : 0)
      height = max(height, size.height)
    }
    return CGSize(width: max(0, width), height: height)
  }

  func placeSubviews(in bounds: CGRect, proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) {
    var x = bounds.minX
    for (index, subview) in subviews.enumerated() {
      let size = subview.sizeThatFits(.unspecified)
      if index > 0 {
        x -= subview[AvatarOverlapKey.self]
      }
      subview.place(at: CGPoint(x: x, y: bounds.midY), anchor: .leading, proposal: ProposedViewSize(size))
      x += size.width
    }
  }
}

extension EnvironmentValues {
  @Entry var avatarSize: AvatarSize = .default
  @Entry var avatarGrouped = false
  @Entry var avatarIconSize: CGFloat = 20
}
```

```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/KeyboardScrollView.swift"
import SwiftUI
import UIKit

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  @State private var anchor = PopupAnchor()

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

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

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

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

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

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

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

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

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

  @Environment(\.colorScheme) private var colorScheme

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

struct OverlayCloseButton: View {
  let label: LocalizedStringKey?

  @Environment(\.overlayDismiss) private var dismiss

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

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

struct ReversedVStack: Layout {
  var spacing: CGFloat

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

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

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

  @Environment(\.overlayDismiss) private var dismiss

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

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

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

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

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

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

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

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

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

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

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

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

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

public struct Separator: View {
  let orientation: Axis

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

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

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

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

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

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

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

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

private struct TextVariantModifier: ViewModifier {
  let variant: TextVariant

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

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

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

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

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

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

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

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

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

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

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

5. Add the files to your app target.

**Jetpack Compose**

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

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

2. Copy the theme files every view uses:

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

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

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

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

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

val LocalColors = staticCompositionLocalOf { LightColors }

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

    val typography: Typography
        get() = Typography

    val radius: Radius
        get() = Radius

    val shadows: Shadows
        get() = Shadows
}

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

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

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

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

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

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

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

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

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

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

3. Copy the source and every file it uses:

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

import androidx.compose.animation.core.Animatable
import androidx.compose.animation.core.CubicBezierEasing
import androidx.compose.animation.core.RepeatMode
import androidx.compose.animation.core.animateFloat
import androidx.compose.animation.core.animateFloatAsState
import androidx.compose.animation.core.infiniteRepeatable
import androidx.compose.animation.core.rememberInfiniteTransition
import androidx.compose.animation.core.tween
import androidx.compose.foundation.background
import androidx.compose.foundation.clickable
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.interaction.collectIsPressedAsState
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.BoxWithConstraints
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.heightIn
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.layout.width
import androidx.compose.foundation.layout.widthIn
import androidx.compose.foundation.rememberScrollState
import androidx.compose.foundation.shape.CircleShape
import androidx.compose.foundation.text.BasicText
import androidx.compose.foundation.verticalScroll
import androidx.compose.runtime.Composable
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.graphicsLayer
import androidx.compose.ui.semantics.Role
import androidx.compose.ui.semantics.heading
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Bold
import com.adamglin.phosphoricons.Light
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.bold.Check
import com.adamglin.phosphoricons.bold.Key
import com.adamglin.phosphoricons.light.ScanSmiley
import com.adamglin.phosphoricons.regular.ScanSmiley
import com.esuiss.ui.components.Avatar
import com.esuiss.ui.components.AvatarSize
import com.esuiss.ui.components.BottomBar
import com.esuiss.ui.components.BottomBarContent
import com.esuiss.ui.components.Button
import com.esuiss.ui.components.ButtonSize
import com.esuiss.ui.components.ButtonVariant
import com.esuiss.ui.components.Dialog
import com.esuiss.ui.components.DialogDescription
import com.esuiss.ui.components.DialogTitle
import com.esuiss.ui.components.Icon
import com.esuiss.ui.components.LocalContentStyle
import com.esuiss.ui.components.Screen
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography
import kotlinx.coroutines.delay

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

private val PopEasing = CubicBezierEasing(0.3f, 1.25f, 0.5f, 1f)

private enum class PasskeyStatus { Idle, Scan, Ok, Done }

@Composable
fun LoginPasskey(
    modifier: Modifier = Modifier,
    onContinue: () -> Unit = {},
    onChangeAccount: () -> Unit = {},
    onUsePassword: () -> Unit = {},
) {
    val colors = EsuissTheme.colors
    var status by rememberSaveable { mutableStateOf(PasskeyStatus.Idle) }

    LaunchedEffect(status) {
        when (status) {
            PasskeyStatus.Scan -> {
                delay(1500)
                status = PasskeyStatus.Ok
            }
            PasskeyStatus.Ok -> {
                delay(900)
                status = PasskeyStatus.Done
            }
            else -> Unit
        }
    }

    Screen(modifier) {
        if (status == PasskeyStatus.Done) {
            Welcome { status = PasskeyStatus.Idle }
            return@Screen
        }
        Column(Modifier.fillMaxSize()) {
            BoxWithConstraints(Modifier.weight(1f)) {
                val height = maxHeight
                Column(
                    modifier = Modifier
                        .fillMaxSize()
                        .verticalScroll(rememberScrollState()),
                ) {
                    Column(
                        modifier = Modifier
                            .fillMaxWidth()
                            .heightIn(min = height)
                            .padding(24.dp),
                        verticalArrangement = Arrangement.Center,
                        horizontalAlignment = Alignment.CenterHorizontally,
                    ) {
                        Box(
                            Modifier
                                .size(72.dp)
                                .background(colors.surfaceSecondary, CircleShape),
                            contentAlignment = Alignment.Center,
                        ) {
                            Icon(PhosphorIcons.Bold.Key, contentDescription = null, size = 34.dp, tint = colors.accent)
                        }
                        Spacer(Modifier.height(22.dp))
                        BasicText(
                            "Sign in without a password.",
                            modifier = Modifier.semantics { heading() },
                            style = Typography.xl3.copy(
                                color = colors.label,
                                fontWeight = FontWeight.SemiBold,
                                textAlign = TextAlign.Center,
                            ),
                        )
                        Spacer(Modifier.height(12.dp))
                        BasicText(
                            "With a passkey, your face or fingerprint is all it takes. Nothing to remember, nothing to type.",
                            modifier = Modifier.widthIn(max = 480.dp),
                            style = Typography.lg.copy(color = colors.labelSecondary, textAlign = TextAlign.Center),
                        )
                        Spacer(Modifier.height(28.dp))
                        AccountPill(onChangeAccount)
                        Spacer(Modifier.height(40.dp))
                        BasicText(
                            "Passkeys are end-to-end encrypted and sync across all your devices with suiss Keychain.",
                            modifier = Modifier.widthIn(max = 420.dp),
                            style = Typography.xs.copy(color = colors.labelSecondary, textAlign = TextAlign.Center),
                        )
                    }
                }
            }
            BottomBar {
                BottomBarContent {
                    Button(
                        onClick = {
                            onContinue()
                            status = PasskeyStatus.Scan
                        },
                        size = ButtonSize.Lg,
                        block = true,
                    ) {
                        Icon(PhosphorIcons.Regular.ScanSmiley, contentDescription = null, size = 18.dp)
                        BasicText("Continue with passkey", style = LocalContentStyle.current)
                    }
                    Button("Sign in with password ›", onUsePassword, variant = ButtonVariant.Plain)
                }
            }
        }
        val scanning = status == PasskeyStatus.Scan || status == PasskeyStatus.Ok
        Dialog(
            open = scanning,
            onOpenChange = { if (!it) status = PasskeyStatus.Idle },
            modifier = Modifier.width(260.dp),
            showCloseButton = false,
        ) {
            Column(
                modifier = Modifier.fillMaxWidth(),
                horizontalAlignment = Alignment.CenterHorizontally,
                verticalArrangement = Arrangement.spacedBy(14.dp),
            ) {
                ScanGlyph(verified = status == PasskeyStatus.Ok)
                Column(
                    horizontalAlignment = Alignment.CenterHorizontally,
                    verticalArrangement = Arrangement.spacedBy(3.dp),
                ) {
                    DialogTitle(if (status == PasskeyStatus.Ok) "Verified" else "Face scan")
                    DialogDescription("Passkey for suiss.com")
                }
                Button(
                    "Cancel",
                    { status = PasskeyStatus.Idle },
                    modifier = Modifier.graphicsLayer { alpha = if (status == PasskeyStatus.Ok) 0f else 1f },
                    variant = ButtonVariant.Plain,
                    enabled = status != PasskeyStatus.Ok,
                )
            }
        }
    }
}

@Composable
private fun AccountPill(onChange: () -> Unit) {
    val colors = EsuissTheme.colors
    val interaction = remember { MutableInteractionSource() }
    val pressed by interaction.collectIsPressedAsState()
    Row(
        modifier = Modifier
            .background(colors.surfaceSecondary, CircleShape)
            .padding(start = 8.dp, end = 16.dp, top = 8.dp, bottom = 8.dp),
        horizontalArrangement = Arrangement.spacedBy(10.dp),
        verticalAlignment = Alignment.CenterVertically,
    ) {
        GradientAvatar("JR", Modifier.size(28.dp), AvatarSize.Sm)
        BasicText("jamie@suiss.com", style = Typography.base.copy(color = colors.label))
        BasicText(
            "Change ›",
            modifier = Modifier
                .graphicsLayer { alpha = if (pressed) 0.5f else 1f }
                .clickable(interactionSource = interaction, indication = null, role = Role.Button, onClick = onChange),
            style = Typography.sm.copy(color = colors.link),
        )
    }
}

@Composable
private fun GradientAvatar(initials: String, modifier: Modifier, size: AvatarSize) {
    val colors = EsuissTheme.colors
    Avatar(
        modifier = modifier,
        size = size,
        fallback = {
            Box(
                Modifier
                    .fillMaxSize()
                    .background(colors.indigo, CircleShape),
                contentAlignment = Alignment.Center,
            ) {
                BasicText(
                    initials,
                    style = (if (size == AvatarSize.Sm) Typography.xs3 else Typography.xl3).copy(
                        color = colors.onAccent,
                        fontWeight = FontWeight.SemiBold,
                    ),
                )
            }
        },
    )
}

@Composable
private fun ScanGlyph(verified: Boolean) {
    val colors = EsuissTheme.colors
    val pulse = rememberInfiniteTransition(label = "pulse")
    val breathe by pulse.animateFloat(
        initialValue = 1f,
        targetValue = 0.5f,
        animationSpec = infiniteRepeatable(tween(600), RepeatMode.Reverse),
        label = "breathe",
    )
    val glyph by animateFloatAsState(if (verified) 0f else 1f, tween(500), label = "glyph")
    val check by animateFloatAsState(if (verified) 1f else 0f, tween(550, easing = PopEasing), label = "check")
    Box(Modifier.size(72.dp), contentAlignment = Alignment.Center) {
        Icon(
            PhosphorIcons.Light.ScanSmiley,
            contentDescription = null,
            modifier = Modifier.graphicsLayer {
                alpha = glyph * (if (verified) 1f else breathe)
                val scale = 0.6f + 0.4f * glyph
                scaleX = scale
                scaleY = scale
            },
            size = 72.dp,
            tint = colors.label,
        )
        Box(
            Modifier
                .size(60.dp)
                .graphicsLayer {
                    alpha = check.coerceIn(0f, 1f)
                    val scale = 0.4f + 0.6f * check
                    scaleX = scale
                    scaleY = scale
                }
                .background(colors.success, CircleShape),
            contentAlignment = Alignment.Center,
        ) {
            Icon(PhosphorIcons.Bold.Check, contentDescription = null, size = 32.dp, tint = colors.onAccent)
        }
    }
}

@Composable
private fun Welcome(onSignOut: () -> Unit) {
    val colors = EsuissTheme.colors
    val appear = remember { Animatable(0f) }
    LaunchedEffect(Unit) { appear.animateTo(1f, tween(1000, easing = RevealEasing)) }
    val interaction = remember { MutableInteractionSource() }
    val pressed by interaction.collectIsPressedAsState()
    Column(
        modifier = Modifier
            .fillMaxSize()
            .padding(24.dp)
            .graphicsLayer {
                alpha = appear.value
                translationY = (1f - appear.value) * 18.dp.toPx()
            },
        verticalArrangement = Arrangement.spacedBy(14.dp, Alignment.CenterVertically),
        horizontalAlignment = Alignment.CenterHorizontally,
    ) {
        GradientAvatar("JR", Modifier.size(84.dp), AvatarSize.Xl)
        BasicText(
            "Welcome, Jamie.",
            modifier = Modifier.semantics { heading() },
            style = Typography.xl3.copy(color = colors.label, fontWeight = FontWeight.SemiBold, textAlign = TextAlign.Center),
        )
        BasicText(
            "You signed in with a passkey. No password needed.",
            style = Typography.lg.copy(color = colors.labelSecondary, textAlign = TextAlign.Center),
        )
        BasicText(
            "Sign out ›",
            modifier = Modifier
                .graphicsLayer { alpha = if (pressed) 0.5f else 1f }
                .clickable(interactionSource = interaction, indication = null, role = Role.Button, onClick = onSignOut),
            style = Typography.lg.copy(color = colors.link),
        )
    }
}
```

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

import androidx.compose.foundation.Image
import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.offset
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.staticCompositionLocalOf
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.graphics.painter.Painter
import androidx.compose.ui.layout.ContentScale
import androidx.compose.ui.layout.Layout
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.unit.Dp
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.Typography

enum class AvatarSize(
    val size: Dp,
    internal val iconSize: Dp,
    internal val badgeSize: Dp,
    internal val badgeIconSize: Dp,
    internal val countIconSize: Dp,
) {
    Sm(24.dp, 14.dp, 12.dp, 0.dp, 12.dp),
    Default(32.dp, 20.dp, 16.dp, 8.dp, 16.dp),
    Lg(40.dp, 24.dp, 18.dp, 10.dp, 20.dp),
    Xl(64.dp, 40.dp, 22.dp, 12.dp, 28.dp),
    ;

    internal val textStyle: TextStyle
        get() = when (this) {
            Sm -> Typography.xs3
            Default -> Typography.xs
            Lg -> Typography.md
            Xl -> Typography.xl2
        }
}

private val LocalAvatarSize = staticCompositionLocalOf { AvatarSize.Default }

private val LocalAvatarGrouped = staticCompositionLocalOf { false }

@Composable
fun Avatar(
    modifier: Modifier = Modifier,
    size: AvatarSize = AvatarSize.Default,
    image: Painter? = null,
    contentDescription: String? = null,
    badge: (@Composable () -> Unit)? = null,
    fallback: (@Composable () -> Unit)? = null,
) {
    val colors = EsuissTheme.colors
    val grouped = LocalAvatarGrouped.current
    CompositionLocalProvider(LocalAvatarSize provides size, LocalAvatarGrouped provides false) {
        Box(modifier.size(size.size)) {
            Box(
                Modifier
                    .fillMaxSize()
                    .then(
                        if (grouped) {
                            Modifier.background(colors.surface, CircleShape).padding(2.dp)
                        } else {
                            Modifier
                        },
                    )
                    .clip(CircleShape),
                contentAlignment = Alignment.Center,
            ) {
                fallback?.invoke()
                if (image != null) {
                    Image(
                        painter = image,
                        contentDescription = contentDescription,
                        modifier = Modifier.fillMaxSize(),
                        contentScale = ContentScale.Crop,
                    )
                }
            }
            if (badge != null) {
                Box(Modifier.align(Alignment.BottomEnd).offset(2.dp, 2.dp)) {
                    badge()
                }
            }
        }
    }
}

@Composable
fun AvatarFallback(
    modifier: Modifier = Modifier,
    content: @Composable () -> Unit,
) {
    val colors = EsuissTheme.colors
    val size = LocalAvatarSize.current
    val background = if (colors.isDark) {
        colors.labelSecondary.copy(alpha = colors.labelSecondary.alpha * 0.6f)
    } else {
        colors.labelSecondary
    }
    Box(
        modifier = modifier.fillMaxSize().background(background, CircleShape),
        contentAlignment = Alignment.Center,
    ) {
        CompositionLocalProvider(
            LocalContentStyle provides size.textStyle.copy(color = colors.onAccent, fontWeight = FontWeight.SemiBold),
            LocalContentColor provides colors.onAccent,
            LocalIconSize provides size.iconSize,
        ) {
            content()
        }
    }
}

@Composable
fun AvatarFallback(
    text: String,
    modifier: Modifier = Modifier,
) {
    AvatarFallback(modifier) {
        BasicText(text.uppercase(), style = LocalContentStyle.current, maxLines = 1)
    }
}

@Composable
fun AvatarBadge(
    modifier: Modifier = Modifier,
    content: @Composable () -> Unit = {},
) {
    val colors = EsuissTheme.colors
    val size = LocalAvatarSize.current
    Box(
        modifier = modifier
            .size(size.badgeSize)
            .background(colors.surface, CircleShape)
            .padding(2.dp)
            .background(colors.accent, CircleShape),
        contentAlignment = Alignment.Center,
    ) {
        if (size != AvatarSize.Sm) {
            CompositionLocalProvider(
                LocalContentStyle provides Typography.xs3.copy(color = colors.onAccent),
                LocalContentColor provides colors.onAccent,
                LocalIconSize provides size.badgeIconSize,
            ) {
                content()
            }
        }
    }
}

@Composable
fun AvatarGroup(
    modifier: Modifier = Modifier,
    content: @Composable () -> Unit,
) {
    Layout(
        content = { CompositionLocalProvider(LocalAvatarGrouped provides true, content = content) },
        modifier = modifier,
    ) { measurables, constraints ->
        val loose = constraints.copy(minWidth = 0, minHeight = 0)
        val placeables = measurables.map { it.measure(loose) }
        val large = AvatarSize.Xl.size.roundToPx()
        val offsets = IntArray(placeables.size)
        var x = 0
        placeables.forEachIndexed { index, placeable ->
            if (index > 0) x -= if (placeable.height >= large) 16.dp.roundToPx() else 8.dp.roundToPx()
            offsets[index] = x
            x += placeable.width
        }
        val height = placeables.maxOfOrNull { it.height } ?: 0
        layout(constraints.constrainWidth(x.coerceAtLeast(0)), constraints.constrainHeight(height)) {
            placeables.forEachIndexed { index, placeable ->
                placeable.placeRelative(offsets[index], (height - placeable.height) / 2)
            }
        }
    }
}

@Composable
fun AvatarGroupCount(
    modifier: Modifier = Modifier,
    size: AvatarSize = AvatarSize.Default,
    content: @Composable () -> Unit,
) {
    val colors = EsuissTheme.colors
    Box(
        modifier = modifier
            .size(size.size)
            .background(colors.surface, CircleShape)
            .padding(2.dp)
            .background(colors.surfaceSecondary, CircleShape),
        contentAlignment = Alignment.Center,
    ) {
        CompositionLocalProvider(
            LocalContentStyle provides size.textStyle.copy(color = colors.label, fontWeight = FontWeight.SemiBold),
            LocalContentColor provides colors.label,
            LocalIconSize provides size.countIconSize,
        ) {
            content()
        }
    }
}

@Composable
fun AvatarGroupCount(
    text: String,
    modifier: Modifier = Modifier,
    size: AvatarSize = AvatarSize.Default,
) {
    AvatarGroupCount(modifier, size) {
        BasicText(text, style = LocalContentStyle.current, maxLines = 1)
    }
}
```

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

enum class ButtonGroupOrientation { Horizontal, Vertical }

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

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

internal object ButtonGroupFill

private object ButtonGroupDivider

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

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

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

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

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

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

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

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

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

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

val LocalContentStyle = compositionLocalOf { TextStyle.Default }

val LocalContentColor = compositionLocalOf { Color.Unspecified }

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

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

import androidx.compose.animation.AnimatedVisibility
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.scaleIn
import androidx.compose.animation.scaleOut
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.ColumnScope
import androidx.compose.foundation.layout.WindowInsets
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.safeDrawing
import androidx.compose.foundation.layout.widthIn
import androidx.compose.foundation.layout.windowInsetsPadding
import androidx.compose.foundation.rememberScrollState
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.foundation.text.BasicText
import androidx.compose.foundation.verticalScroll
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.Immutable
import androidx.compose.runtime.remember
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.input.pointer.pointerInput
import androidx.compose.ui.layout.Layout
import androidx.compose.ui.semantics.paneTitle
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Radius
import com.esuiss.ui.theme.Typography

@Immutable
private data class DialogCloseInfo(val hasCloseButton: Boolean, val hasCloseLabel: Boolean, val close: () -> Unit)

private val LocalDialogClose = staticCompositionLocalOf { DialogCloseInfo(false, false) {} }

@Composable
internal fun CenteredModal(
    open: Boolean,
    onDismissRequest: () -> Unit,
    dismissOnScrimClick: Boolean,
    maxWidth: Dp,
    modifier: Modifier,
    overlay: @Composable () -> Unit = {},
    content: @Composable ColumnScope.() -> Unit,
) {
    val transition = remember { MutableTransitionState(false) }
    transition.targetState = open
    val paneTitle = remember { PaneTitleState() }
    val colors = EsuissTheme.colors
    ModalWindow(
        visible = transition.currentState || transition.targetState,
        onDismissRequest = { if (open) onDismissRequest() },
        dismissOnBackPress = true,
        paneTitle = paneTitle.value,
    ) {
        Box(modifier = Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
            Scrim(transition, 150, 100, onClick = if (dismissOnScrimClick) ({ if (open) onDismissRequest() }) else null)
            AnimatedVisibility(
                visibleState = transition,
                modifier = Modifier
                    .windowInsetsPadding(WindowInsets.safeDrawing)
                    .padding(16.dp),
                enter = fadeIn(tween(150)) + scaleIn(tween(150), initialScale = 0.95f),
                exit = fadeOut(tween(100)) + scaleOut(tween(100), targetScale = 0.95f),
            ) {
                val shape = RoundedCornerShape(Radius.xl2)
                Box(
                    modifier = modifier
                        .widthIn(max = maxWidth)
                        .fillMaxWidth()
                        .raisedSurface(colors, shape)
                        .pointerInput(Unit) {}
                        .semantics { paneTitle.value?.let { this.paneTitle = it } },
                ) {
                    CompositionLocalProvider(
                        LocalPaneTitle provides paneTitle,
                        LocalContentStyle provides Typography.base.copy(color = colors.label),
                        LocalContentColor provides colors.label,
                    ) {
                        Column(
                            modifier = Modifier
                                .fillMaxWidth()
                                .verticalScroll(rememberScrollState())
                                .padding(24.dp),
                            verticalArrangement = Arrangement.spacedBy(24.dp),
                            content = content,
                        )
                        overlay()
                    }
                }
            }
        }
    }
}

@Composable
fun Dialog(
    open: Boolean,
    onOpenChange: (Boolean) -> Unit,
    modifier: Modifier = Modifier,
    showCloseButton: Boolean = true,
    closeLabel: String? = null,
    dismissible: Boolean = true,
    content: @Composable ColumnScope.() -> Unit,
) {
    val close = { onOpenChange(false) }
    val info = DialogCloseInfo(showCloseButton, showCloseButton && closeLabel != null, close)
    CompositionLocalProvider(LocalDialogClose provides info) {
        CenteredModal(
            open = open,
            onDismissRequest = { if (dismissible) close() },
            dismissOnScrimClick = dismissible,
            maxWidth = 448.dp,
            modifier = modifier,
            overlay = {
                if (showCloseButton) {
                    Box(modifier = Modifier.fillMaxWidth(), contentAlignment = Alignment.TopEnd) {
                        OverlayCloseButton(
                            onClick = close,
                            label = closeLabel,
                            modifier = Modifier.padding(
                                top = if (closeLabel != null) 19.dp else 13.dp,
                                end = if (closeLabel != null) 16.dp else 10.dp,
                            ),
                        )
                    }
                }
            },
            content = content,
        )
    }
}

@Composable
fun DialogHeader(
    modifier: Modifier = Modifier,
    content: @Composable ColumnScope.() -> Unit,
) {
    val info = LocalDialogClose.current
    val end = when {
        info.hasCloseLabel -> 72.dp
        info.hasCloseButton -> 32.dp
        else -> 0.dp
    }
    Column(
        modifier = modifier.fillMaxWidth().padding(end = end),
        verticalArrangement = Arrangement.spacedBy(6.dp),
        content = content,
    )
}

@Composable
fun DialogFooter(
    modifier: Modifier = Modifier,
    showCloseButton: Boolean = false,
    content: @Composable () -> Unit,
) {
    val info = LocalDialogClose.current
    Layout(
        modifier = modifier.fillMaxWidth(),
        content = {
            content()
            if (showCloseButton) {
                Button("Close", onClick = info.close, modifier = Modifier.fillMaxWidth(), variant = ButtonVariant.Secondary)
            }
        },
    ) { measurables, constraints ->
        val gap = 8.dp.roundToPx()
        val placeables = measurables.map { it.measure(constraints.copy(minHeight = 0)) }
        val height = placeables.sumOf { it.height } + gap * (placeables.size - 1).coerceAtLeast(0)
        layout(constraints.maxWidth, height) {
            var y = 0
            placeables.asReversed().forEach {
                it.placeRelative(0, y)
                y += it.height + gap
            }
        }
    }
}

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

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

```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
                }
            }
        }
    }
}
```

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

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

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

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

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

enum class ScreenVariant { Default, Secondary }

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

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

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

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

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

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

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

## Usage

```tsx
import { LoginPasskey } from "@/components/blocks/login-passkey"
```

```tsx
<LoginPasskey />
```

Call your passkey API from `onContinue`, and wire `onChangeAccount` and `onUsePassword` to your navigation. The account details and the scan timing are sample values in the component.