:root {
  color-scheme: dark;
  --demo-bg: #0d0f13;
  --demo-surface: #171a20;
  --demo-surface-2: #20242c;
  --demo-border: #313743;
  --demo-text: #f2f4f7;
  --demo-muted: #9ba4b3;
  --demo-accent: #818cf8;
  --demo-accent-soft: rgba(129, 140, 248, .16);
  --demo-danger: #ff6b72;
  --demo-ok: #4fd1a5;
  --demo-scrim: rgba(0, 0, 0, .58);
  --demo-radius-sm: 8px;
  --demo-radius: 12px;
  --demo-radius-lg: 18px;
  --demo-space-1: 4px;
  --demo-space-2: 8px;
  --demo-space-3: 12px;
  --demo-space-4: 16px;
  --demo-space-5: 20px;
  --demo-shadow: 0 18px 48px rgba(0, 0, 0, .35);
  --demo-motion-fast: 180ms;
  --demo-motion-open: 360ms;
  --demo-motion-close: 260ms;
  --demo-ease: cubic-bezier(.4, 0, .2, 1);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
}

:root[data-theme="light"] {
  color-scheme: light;
  --demo-bg: #f5f6f9;
  --demo-surface: #ffffff;
  --demo-surface-2: #edf0f5;
  --demo-border: #d9dee8;
  --demo-text: #11151d;
  --demo-muted: #626c7d;
  --demo-accent: #5b5bd6;
  --demo-accent-soft: rgba(91, 91, 214, .10);
  --demo-danger: #c7353d;
  --demo-ok: #18794e;
  --demo-scrim: rgba(18, 22, 30, .38);
  --demo-shadow: 0 18px 48px rgba(26, 35, 52, .16);
}

:root[data-platform="ios"] { --demo-accent: #6f7a89; }
:root[data-platform="android"] { --demo-accent: #159a74; }

* { box-sizing: border-box; }

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
}

#demo-root {
  width: 100%;
  height: 100%;
}

body {
  background: var(--demo-bg);
  color: var(--demo-text);
  font-size: 14px;
  line-height: 1.5;
}

button,
input {
  font: inherit;
}

button {
  border: 1px solid var(--demo-border);
  border-radius: var(--demo-radius-sm);
  background: var(--demo-surface);
  color: var(--demo-text);
  cursor: pointer;
}

button:hover {
  border-color: var(--demo-accent);
}

button:focus-visible,
input:focus-visible,
.demo-grab:focus-visible {
  outline: 2px solid var(--demo-accent);
  outline-offset: 2px;
}

.demo-app {
  position: relative;
  display: flex;
  width: 100%;
  height: 100%;
  min-height: 0;
  flex-direction: column;
  overflow: hidden;
  background: var(--demo-bg);
}

.demo-app-header {
  display: flex;
  min-height: 48px;
  align-items: center;
  justify-content: space-between;
  gap: var(--demo-space-3);
  padding: 0 var(--demo-space-4);
  border-bottom: 1px solid var(--demo-border);
  background: var(--demo-surface);
}

.demo-app-header strong {
  font-size: 14px;
}

.demo-app-main {
  display: flex;
  min-height: 0;
  flex: 1;
  flex-direction: column;
  gap: var(--demo-space-4);
  padding: var(--demo-space-4);
  overflow: auto;
}

.demo-copy {
  margin: 0;
  color: var(--demo-muted);
}

.demo-primary {
  min-height: 38px;
  padding: 0 var(--demo-space-4);
  border-color: var(--demo-accent);
  background: var(--demo-accent);
  color: white;
  font-weight: 650;
}

.demo-secondary {
  min-height: 36px;
  padding: 0 var(--demo-space-3);
}

.demo-danger {
  color: var(--demo-danger);
}

.demo-card {
  padding: var(--demo-space-4);
  border: 1px solid var(--demo-border);
  border-radius: var(--demo-radius);
  background: var(--demo-surface);
}

.demo-stack {
  display: grid;
  gap: var(--demo-space-3);
}

.demo-inline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--demo-space-2);
}

.demo-status {
  min-height: 22px;
  margin: 0;
  color: var(--demo-muted);
  font-size: 12px;
}

.demo-scrim {
  position: absolute;
  z-index: 5;
  inset: 0;
  border: 0;
  border-radius: 0;
  background: var(--demo-scrim);
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms var(--demo-ease);
}

.demo-scrim.is-open {
  opacity: 1;
  pointer-events: auto;
}

.demo-sheet,
.demo-action-sheet {
  position: absolute;
  z-index: 6;
  right: 0;
  bottom: 0;
  left: 0;
  display: grid;
  gap: var(--demo-space-3);
  max-height: 82%;
  padding: var(--demo-space-4);
  transform: translate3d(0, calc(100% + var(--demo-space-2)), 0);
  border: 1px solid var(--demo-border);
  border-bottom: 0;
  border-radius: var(--demo-radius-lg) var(--demo-radius-lg) 0 0;
  background: var(--demo-surface);
  box-shadow: var(--demo-shadow);
  pointer-events: none;
  transition: transform var(--demo-motion-open) var(--demo-ease);
  will-change: transform;
}

.demo-sheet[data-closing="true"],
.demo-action-sheet[data-closing="true"] {
  transition-duration: var(--demo-motion-close);
}

.demo-sheet.is-open,
.demo-action-sheet.is-open {
  transform: translate3d(0, var(--drag-y, 0), 0);
  pointer-events: auto;
}

.demo-sheet.is-dragging {
  transition: none;
}

.demo-grab {
  position: relative;
  width: 100%;
  height: 32px;
  margin: -8px 0;
  border-radius: var(--demo-radius-sm);
  touch-action: none;
}

.demo-grab[data-drag-handle] {
  cursor: ns-resize;
}

.demo-grab::before {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 40px;
  height: 5px;
  transform: translate(-50%, -50%);
  border-radius: 999px;
  background: var(--demo-border);
  content: "";
}

:root[data-platform="ios"] .demo-sheet,
:root[data-platform="ios"] .demo-action-sheet {
  border-radius: 12px 12px 0 0;
}

:root[data-platform="android"] .demo-sheet,
:root[data-platform="android"] .demo-action-sheet {
  border-radius: 28px 28px 0 0;
}

.action-list {
  display: grid;
  gap: var(--demo-space-2);
}

.action-list button {
  min-height: 38px;
  text-align: left;
  padding-inline: var(--demo-space-3);
}

.state-switcher,
.segmented-demo {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2px;
  padding: 3px;
  border-radius: var(--demo-radius-sm);
  background: var(--demo-surface-2);
}

.state-switcher button,
.segmented-demo button {
  min-width: 0;
  min-height: 34px;
  padding: 0 var(--demo-space-2);
  border: 0;
  background: transparent;
  color: var(--demo-muted);
  font-size: 12px;
}

.state-switcher button[aria-pressed="true"],
.segmented-demo button[aria-checked="true"] {
  background: var(--demo-surface);
  box-shadow: 0 1px 4px rgba(0, 0, 0, .16);
  color: var(--demo-accent);
  font-weight: 650;
}

.empty-preview {
  display: grid;
  min-height: 150px;
  place-content: center;
  gap: var(--demo-space-3);
  padding: var(--demo-space-4);
  text-align: center;
}

.empty-preview h2,
.empty-preview p {
  margin: 0;
}

.empty-preview h2 { font-size: 18px; }
.empty-preview p { color: var(--demo-muted); }

.progress-shell {
  display: grid;
  min-height: 154px;
  place-content: center;
  gap: var(--demo-space-4);
  text-align: center;
}

.spinner {
  width: 38px;
  height: 38px;
  margin-inline: auto;
  border: 4px solid var(--demo-border);
  border-top-color: var(--demo-accent);
  border-radius: 50%;
  animation: demo-spin .8s linear infinite;
}

.progress-shell progress {
  width: min(240px, 70vw);
  accent-color: var(--demo-accent);
}

@keyframes demo-spin { to { transform: rotate(1turn); } }

.nav-content {
  display: grid;
  flex: 1;
  place-content: center;
  color: var(--demo-muted);
  text-align: center;
}

.nav-action,
.nav-back {
  min-height: 32px;
  padding-inline: var(--demo-space-3);
  border: 0;
  background: transparent;
  color: var(--demo-accent);
}

.pull-list {
  position: relative;
  display: grid;
  min-height: 0;
  flex: 1;
  gap: var(--demo-space-2);
  padding: var(--demo-space-3);
  overflow: auto;
  overscroll-behavior: contain;
  touch-action: pan-y;
  transform: translateY(var(--pull-y, 0));
  transition: transform var(--demo-motion-fast) var(--demo-ease);
}

.pull-list.is-dragging { transition: none; }

.pull-item {
  min-height: 48px;
  padding: var(--demo-space-3);
  border: 1px solid var(--demo-border);
  border-radius: var(--demo-radius-sm);
  background: var(--demo-surface);
}

.pull-indicator {
  position: absolute;
  top: var(--demo-space-2);
  left: 50%;
  z-index: 2;
  padding: var(--demo-space-1) var(--demo-space-3);
  transform: translate(-50%, -150%);
  border-radius: 999px;
  background: var(--demo-surface-2);
  color: var(--demo-muted);
  font-size: 12px;
  transition: transform var(--demo-motion-fast) var(--demo-ease);
}

.pull-indicator.is-visible { transform: translate(-50%, 0); }

.segment-panel {
  min-height: 142px;
  padding: var(--demo-space-4);
  border: 1px solid var(--demo-border);
  border-radius: var(--demo-radius);
  background: var(--demo-surface);
}

.segment-panel h2,
.segment-panel p { margin: 0; }
.segment-panel p { margin-top: var(--demo-space-2); color: var(--demo-muted); }

.skeleton-list,
.content-list {
  display: grid;
  gap: var(--demo-space-3);
}

.skeleton-row,
.content-row {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: var(--demo-space-3);
  align-items: center;
}

.skeleton-block {
  height: 12px;
  border-radius: 5px;
  background: var(--demo-surface-2);
  animation: demo-pulse 1.2s ease-in-out infinite alternate;
}

.skeleton-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
}

.skeleton-lines { display: grid; gap: var(--demo-space-2); }
.skeleton-lines .skeleton-block:last-child { width: 62%; }

@keyframes demo-pulse { to { opacity: .45; } }

.content-avatar {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 50%;
  background: var(--demo-accent-soft);
  color: var(--demo-accent);
  font-weight: 700;
}

.content-row p,
.content-row strong { margin: 0; }
.content-row p { color: var(--demo-muted); font-size: 12px; }

.tab-content {
  display: grid;
  min-height: 0;
  flex: 1;
  place-content: center;
  gap: var(--demo-space-3);
  padding: var(--demo-space-4);
  text-align: center;
}

.tab-content input {
  width: min(280px, 75vw);
  min-height: 38px;
  padding-inline: var(--demo-space-3);
  border: 1px solid var(--demo-border);
  border-radius: var(--demo-radius-sm);
  background: var(--demo-surface);
  color: var(--demo-text);
}

.tab-bar-demo {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--demo-space-1);
  padding: var(--demo-space-2);
  border-top: 1px solid var(--demo-border);
  background: var(--demo-surface);
}

.tab-bar-demo button {
  min-height: 42px;
  border: 0;
  background: transparent;
  color: var(--demo-muted);
}

.tab-bar-demo button[aria-current="page"] {
  color: var(--demo-accent);
  font-weight: 650;
}

.toast-region {
  position: absolute;
  right: var(--demo-space-4);
  bottom: var(--demo-space-4);
  left: var(--demo-space-4);
  z-index: 4;
  pointer-events: none;
}

.toast-message {
  display: flex;
  min-height: 42px;
  align-items: center;
  justify-content: space-between;
  gap: var(--demo-space-3);
  padding: var(--demo-space-2) var(--demo-space-3);
  transform: translateY(calc(100% + var(--demo-space-4)));
  border: 1px solid var(--demo-border);
  border-radius: var(--demo-radius-sm);
  background: var(--demo-surface-2);
  box-shadow: var(--demo-shadow);
  opacity: 0;
  transition: transform var(--demo-motion-fast) var(--demo-ease), opacity var(--demo-motion-fast) var(--demo-ease);
}

.toast-message.is-visible {
  transform: translateY(0);
  opacity: 1;
}

.inline-confirmation {
  padding: var(--demo-space-3);
  border: 1px solid color-mix(in srgb, var(--demo-ok) 45%, var(--demo-border));
  border-radius: var(--demo-radius-sm);
  background: color-mix(in srgb, var(--demo-ok) 12%, transparent);
  color: var(--demo-ok);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}