@import url("/assets/site-tokens.css");

:where([data-interactive-lab]) [data-lab-control] {
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

:where([data-interactive-lab]) [data-lab-control]:focus-visible,
:where([data-interactive-lab]) [data-lab-dot]:focus-visible {
  outline: 2px solid var(--lab-focus-color);
  outline-offset: 3px;
}

:where([data-interactive-lab]) [data-lab-control][aria-pressed="true"] {
  box-shadow: 0 0 0 1px var(--lab-focus-color);
}

:where([data-interactive-lab]) [data-lab-control]:disabled {
  cursor: not-allowed;
}

:where([data-interactive-lab]) [data-lab-dots] {
  user-select: none;
}

:where([data-interactive-lab]) [data-lab-dot] {
  padding: 0;
  cursor: pointer;
}

@media (prefers-reduced-motion: reduce) {
  :where([data-interactive-lab]) *,
  :where([data-interactive-lab]) *::before,
  :where([data-interactive-lab]) *::after {
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
  }
}
/* ── Cross-lab theme bridge and unified site shell ────────────────────── */
html.xianyu-lab {
  --bg: var(--color-bg);
  --base: var(--color-bg);
  --panel: var(--color-surface);
  --surface: var(--color-surface);
  --panel-2: var(--color-surface-raised);
  --surface-2: var(--color-surface-raised);
  --panel-raised: var(--color-surface-raised);
  --panel-strong: var(--color-surface-strong);
  --raised: var(--color-surface-strong);
  --line: var(--color-border);
  --line-strong: var(--color-border-strong);
  --ink: var(--color-text);
  --text: var(--color-text);
  --muted: var(--color-text-muted);
  --dim: var(--color-text-dim);
  --acid: var(--color-accent);
  --lime: var(--color-accent);
  --blue: var(--color-accent);
  --mint: var(--color-interactive);
  --cyan: var(--color-interactive);
  --green: var(--color-success);
  --amber: var(--color-warning);
  --warm: var(--color-warning);
  --red: var(--color-danger);
  --danger: var(--color-danger);
  --coral: var(--color-danger);
  --violet: var(--color-accent);
  --lab-focus-color: var(--color-accent);
  --sans: var(--font-body);
  --display: var(--font-body);
  --serif: var(--font-display);
  --mono: var(--font-mono);
}

html.xianyu-lab body {
  color: var(--color-text);
  background:
    radial-gradient(circle at 82% 6%, rgba(var(--color-accent-rgb), 0.08), transparent 30rem),
    linear-gradient(rgba(var(--color-accent-rgb), 0.025) 1px, transparent 1px),
    var(--color-bg);
  background-size: auto, 100% 48px, auto;
  font-family: var(--font-body);
}

.site-header.unified-site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  min-height: 68px;
  padding: 0;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
  background: rgba(8, 12, 18, 0.9);
  backdrop-filter: blur(18px);
}

.unified-site-header .site-shell-nav {
  width: min(1180px, calc(100% - 40px));
  min-height: 68px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.unified-site-header .site-shell-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--color-text);
  font: 700 13px/1 var(--font-mono);
  letter-spacing: 0.14em;
  text-decoration: none;
}

.unified-site-header .site-shell-brand span {
  width: 31px;
  height: 31px;
  display: grid;
  place-items: center;
  border: 1px solid var(--color-accent);
  border-radius: 50%;
  color: var(--color-accent);
  background: transparent;
}

.unified-site-header .site-shell-brand strong {
  font: inherit;
}

.unified-site-header .site-shell-links {
  display: flex;
  align-items: center;
  gap: 18px;
}

.unified-site-header .site-shell-links a {
  color: var(--color-text-muted);
  font: 14px/1.4 var(--font-body);
  text-decoration: none;
}

.unified-site-header .site-shell-links a:hover,
.unified-site-header .site-shell-links a:focus-visible,
.unified-site-header .site-context-link {
  color: var(--color-accent);
}

.unified-site-header .site-shell-search {
  display: flex;
}

.unified-site-header .site-shell-search label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

.unified-site-header .site-shell-search input {
  min-width: 0;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  outline: none;
  color: var(--color-text);
  background: var(--color-surface);
  font: 13px var(--font-body);
}

.unified-site-header .site-shell-search input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(var(--color-accent-rgb), 0.12);
}
.unified-site-header .site-shell-search button {
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-left: 0;
  border-radius: 0 8px 8px 0;
  color: var(--color-accent);
  background: var(--color-surface);
  cursor: pointer;
}

.unified-site-header .site-shell-menu-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-text);
  background: var(--color-surface);
  cursor: pointer;
}

.unified-site-header .site-shell-menu-toggle i,
.unified-site-header .site-shell-menu-toggle i::before {
  width: 14px;
  height: 1px;
  display: block;
  background: currentColor;
  content: "";
}

.unified-site-header .site-shell-menu-toggle i::before {
  transform: translateY(5px);
}

.lab-site-context {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding-top: 24px;
}

.lab-site-context nav {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow: hidden;
  color: var(--color-text-muted);
  font: 11px/1.4 var(--font-mono);
  white-space: nowrap;
}

.lab-site-context nav > * {
  overflow: hidden;
  text-overflow: ellipsis;
}

.lab-site-context nav > * + *::before {
  margin-right: 8px;
  color: var(--color-text-dim);
  content: "/";
}

.lab-site-context a {
  color: var(--color-text-muted);
  text-decoration: none;
}

.lab-site-context [aria-current="page"] {
  color: var(--color-text);
}

.lab-learning-path {
  width: min(1180px, calc(100% - 40px));
  margin: 20px auto 0;
  padding: 14px 18px;
  border-block: 1px solid var(--color-border);
  background: rgba(var(--color-accent-rgb), 0.045);
}

.lab-learning-path__label {
  margin-bottom: 10px;
  color: var(--color-accent);
  font: 700 10px/1.2 var(--font-mono);
  letter-spacing: 0.12em;
}

.lab-learning-path__steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 16px;
}

.lab-learning-path__steps > a,
.lab-learning-path__steps > div {
  min-width: 0;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  column-gap: 10px;
  color: var(--color-text);
  text-decoration: none;
}

.lab-learning-path__steps span {
  grid-row: 1 / span 2;
  align-self: center;
  color: var(--color-text-dim);
  font: 700 12px/1 var(--font-mono);
}

.lab-learning-path__steps strong {
  overflow: hidden;
  font: 700 14px/1.35 var(--font-body);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.lab-learning-path__steps small {
  overflow: hidden;
  color: var(--color-text-muted);
  font: 12px/1.45 var(--font-body);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.lab-learning-path__steps > a:hover strong,
.lab-learning-path__steps > a:focus-visible strong {
  color: var(--color-accent);
}

.lab-learning-path__steps > i {
  color: var(--color-text-dim);
  font-style: normal;
}

@media (max-width: 620px) {
  .unified-site-header .site-shell-nav,
  .lab-site-context,
  .lab-learning-path {
    width: min(100% - 24px, 1180px);
  }

  .lab-learning-path {
    padding: 12px 0;
    background: transparent;
  }

  .lab-learning-path__steps {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .lab-learning-path__steps > i {
    display: none;
  }

  .unified-site-header .site-shell-menu-toggle {
    display: inline-flex;
  }

  .unified-site-header .site-shell-links {
    position: absolute;
    top: 68px;
    right: 12px;
    left: 12px;
    display: none;
    align-items: stretch;
    padding: 12px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-surface-raised);
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.42);
  }

  .unified-site-header .site-shell-links.is-open {
    display: grid;
  }

  .unified-site-header .site-shell-links a,
  .unified-site-header .site-shell-search input {
    width: 100%;
    padding: 12px;
  }

  .unified-site-header .site-shell-search button {
    padding: 12px;
  }
}