:root {
  --bg: #f7f4ee;
  --surface: #ffffff;
  --ink: #241c15;
  --muted: #6b5a4a;
  --border: #e6dfd2;
  --accent: #a3461f;
  --accent-ink: #ffffff;
  --code-bg: #fbfaf7;
  --stage: #ece6db;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Inter, Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15110d;
    --surface: #1e1914;
    --ink: #f4efe4;
    --muted: #b3a593;
    --border: #3a3027;
    --accent: #e2875c;
    --accent-ink: #1a120c;
    --code-bg: #0d1117;
    --stage: #0f0c09;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.55 var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); }
code { font-family: var(--mono); font-size: 0.9em; }
.muted { color: var(--muted); }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
[hidden] { display: none !important; }

.topbar {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 12px 24px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 650; letter-spacing: -0.2px; }
.brand-mark {
  width: 22px; height: 22px; border-radius: 6px; background: var(--accent);
  box-shadow: inset 0 -6px 0 rgba(0, 0, 0, 0.18);
}
.topnav { display: flex; align-items: center; gap: 18px; font-size: 14px; }
.topnav a { color: var(--ink); text-decoration: none; }
.topnav a:hover { color: var(--accent); }
.topnav .cta, .button {
  background: var(--accent); color: var(--accent-ink); padding: 7px 12px; border-radius: 8px; font-weight: 600; text-decoration: none;
}
.topnav .cta:hover { color: var(--accent-ink); filter: brightness(1.08); }

/* Gallery */
.gallery { max-width: 1160px; margin: 0 auto; padding: 0 24px 48px; }
.hero { padding: 56px 0 24px; max-width: 760px; }
.hero h1 { font-size: clamp(32px, 5vw, 48px); line-height: 1.08; letter-spacing: -1.2px; margin: 0 0 16px; }
.lede { font-size: 18px; color: var(--muted); margin: 0 0 24px; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 16px; }
.button { display: inline-block; padding: 10px 16px; }
.badge { font-size: 13px; color: var(--muted); }
.group-title { font-size: 13px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin: 40px 0 14px; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 18px; }
.card {
  display: block; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; overflow: hidden;
  color: var(--ink); text-decoration: none; transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.card:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(36, 28, 21, 0.12); }
.thumb { position: relative; height: 230px; overflow: hidden; background: var(--stage); border-bottom: 1px solid var(--border); }
.thumb iframe {
  position: absolute; top: 0; left: 50%; width: 640px; height: 900px; border: 0;
  transform: translateX(-50%) scale(0.42); transform-origin: top center; pointer-events: none;
}
.card-body { padding: 14px 16px 16px; }
.card-body h3 { margin: 0 0 4px; font-size: 15px; }
.card-body p { margin: 0; font-size: 13px; color: var(--muted); }

/* Detail */
.detail { display: grid; grid-template-columns: 230px minmax(0, 1fr); max-width: 1280px; margin: 0 auto; }
.sidebar { position: sticky; top: 53px; align-self: start; height: calc(100vh - 53px); overflow-y: auto; padding: 24px 16px 24px 24px; }
.nav-group { margin: 18px 0 6px; font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); }
.nav-group:first-child { margin-top: 0; }
#nav a { display: block; padding: 6px 10px; border-radius: 7px; color: var(--ink); text-decoration: none; font-size: 14px; }
#nav a:hover { background: var(--surface); }
#nav a.active { background: var(--surface); box-shadow: inset 0 0 0 1px var(--border); font-weight: 600; }
.mobile-picker { display: none; }
.content { padding: 28px 24px 48px; min-width: 0; }
.content h1 { margin: 0 0 4px; font-size: 28px; letter-spacing: -0.6px; }
.content-head p { margin: 0 0 6px; }
.subject code { background: var(--surface); border: 1px solid var(--border); padding: 2px 6px; border-radius: 6px; }

.tabs { display: flex; gap: 4px; margin: 20px 0 16px; border-bottom: 1px solid var(--border); overflow-x: auto; overflow-y: hidden; scrollbar-width: none; }
.tabs button {
  appearance: none; background: none; border: 0; border-bottom: 2px solid transparent; padding: 9px 12px; margin-bottom: -1px;
  font: inherit; font-size: 14px; color: var(--muted); cursor: pointer; white-space: nowrap;
}
.tabs button:hover { color: var(--ink); }
.tabs button.active { color: var(--ink); border-bottom-color: var(--accent); font-weight: 600; }

.toolbar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 14px; }
.seg { display: inline-flex; background: var(--surface); border: 1px solid var(--border); border-radius: 9px; padding: 3px; }
.seg button {
  appearance: none; border: 0; background: none; font: inherit; font-size: 13px; padding: 5px 11px; border-radius: 6px;
  color: var(--muted); cursor: pointer;
}
.seg button.active { background: var(--ink); color: var(--bg); }
.stage { background: var(--stage); border: 1px solid var(--border); border-radius: 12px; padding: 24px 12px; display: flex; justify-content: center; }
.stage iframe { width: 100%; max-width: 640px; height: 860px; border: 0; border-radius: 6px; background: #f4f4f5; transition: max-width 0.2s ease; }
.stage[data-scheme='dark'] iframe { background: #0e0e10; }
.stage[data-device='mobile'] iframe { max-width: 375px; height: 780px; }
.note { font-size: 13px; margin: 10px 2px 0; }

.code-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 8px 12px; background: var(--surface); border: 1px solid var(--border); border-bottom: 0; border-radius: 10px 10px 0 0; font-size: 13px; }
.code-head .file { font-family: var(--mono); color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.code-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.copy {
  appearance: none; font: inherit; font-size: 13px; font-weight: 600; padding: 4px 10px; border-radius: 6px; cursor: pointer;
  border: 1px solid var(--border); background: var(--bg); color: var(--ink);
}
.copy:hover { border-color: var(--accent); }
.copy.done { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
pre.code, pre.install {
  margin: 0; padding: 16px; overflow: auto; background: var(--code-bg); border: 1px solid var(--border);
  border-radius: 0 0 10px 10px; font: 13px/1.6 var(--mono); max-height: 720px;
}
pre.code code { font-size: inherit; background: none; padding: 0; }
pre.install { border-radius: 0; border-bottom: 0; color: var(--muted); padding: 10px 16px; }

#pane-send h2 { font-size: 18px; margin: 8px 0 6px; letter-spacing: -0.2px; }
#pane-send h2:not(:first-child) { margin-top: 32px; }
#pane-send > p { margin: 0 0 14px; }
.snippet-tabs { display: flex; gap: 4px; flex-wrap: wrap; margin-bottom: 8px; }
.snippet-tabs button {
  appearance: none; font: inherit; font-size: 13px; padding: 5px 11px; border-radius: 7px; cursor: pointer;
  border: 1px solid var(--border); background: var(--surface); color: var(--muted);
}
.snippet-tabs button.active { color: var(--ink); border-color: var(--ink); font-weight: 600; }
.vars { width: 100%; border-collapse: collapse; font-size: 14px; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.vars th, .vars td { text-align: left; padding: 8px 12px; border-top: 1px solid var(--border); vertical-align: top; }
.vars th { border-top: 0; font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
.vars td:last-child { word-break: break-all; }

.footer { border-top: 1px solid var(--border); padding: 24px; text-align: center; font-size: 13px; color: var(--muted); }
.footer p { max-width: 720px; margin: 0 auto; }

@media (max-width: 820px) {
  .topbar { padding: 10px 16px; }
  .topnav { gap: 12px; }
  .topnav a:not(.cta) { display: none; }
  .gallery { padding: 0 16px 40px; }
  .hero { padding-top: 36px; }
  .detail { display: block; }
  .sidebar { position: static; height: auto; padding: 16px 16px 0; }
  #nav { display: none; }
  .mobile-picker { display: block; }
  .mobile-picker select {
    width: 100%; font: inherit; padding: 9px 10px; border-radius: 9px; border: 1px solid var(--border);
    background: var(--surface); color: var(--ink);
  }
  .content { padding: 16px 16px 40px; }
  .stage { padding: 12px 0; border-radius: 10px; }
  .stage iframe { height: 760px; }
}