:root {
  color-scheme: light;
  --bg: #f6f5f1;
  --panel: #ffffff;
  --stage: #eeede7;
  --line: #e1dfd7;
  --text: #17171a;
  --muted: #6d6c66;
  --accent: #1f5f4a;
  --radius: 14px;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.55 var(--sans); font-synthesis: none; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, p, dl, dd { margin: 0; }
button { font: inherit; color: inherit; cursor: pointer; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }

/* Frame */
.top { display: flex; align-items: baseline; gap: 18px; padding: 22px clamp(16px, 4vw, 48px); border-bottom: 1px solid var(--line); }
.brand { font-weight: 650; font-size: 17px; letter-spacing: -0.3px; }
.top-note { color: var(--muted); font-size: 13px; }
.page { max-width: 1320px; margin: 0 auto; padding: 0 clamp(16px, 4vw, 48px) 64px; }
.foot { max-width: 1320px; margin: 0 auto; padding: 24px clamp(16px, 4vw, 48px) 48px; color: var(--muted); font-size: 13px; border-top: 1px solid var(--line); }
.foot a { color: var(--accent); }
.loading, .viewer-fallback { color: var(--muted); font-size: 14px; }
.eyebrow { font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }

/* Home */
.brief { padding: clamp(36px, 6vw, 72px) 0 clamp(28px, 4vw, 44px); max-width: 900px; }
.brief h1 { font-size: clamp(26px, 3.6vw, 44px); line-height: 1.15; letter-spacing: -0.02em; font-weight: 600; margin: 12px 0 16px; text-wrap: balance; }
.brief-meta { color: var(--muted); font-size: 14px; }
.gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; }
.card { display: flex; flex-direction: column; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; transition: border-color .15s, transform .15s; }
.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card-stage { position: relative; aspect-ratio: 4 / 3; background: var(--stage); }
.card-stage .viewer-canvas { pointer-events: none; }
.card-skeleton { position: absolute; inset: 0; background: linear-gradient(100deg, transparent 30%, rgba(255,255,255,.35) 50%, transparent 70%); background-size: 200% 100%; animation: shimmer 1.4s infinite; }
@keyframes shimmer { to { background-position: -200% 0; } }
.card-body { padding: 16px 18px 18px; border-top: 1px solid var(--line); }
.card-body h2 { font-size: 17px; font-weight: 600; letter-spacing: -0.01em; }
.card-score { margin-top: 2px; font-size: 13px; color: var(--muted); }
.card-score .mono, .score .mono { color: var(--accent); font-weight: 600; }
.score { margin-top: 4px; font-size: 14px; color: var(--muted); }
.card-meta { margin-top: 4px; color: var(--muted); font-size: 13px; }
.empty { border: 1px dashed var(--line); border-radius: var(--radius); padding: 56px 24px; text-align: center; color: var(--muted); }
.empty h2 { color: var(--text); font-size: 20px; font-weight: 600; margin-bottom: 6px; }
.empty .btn { margin-top: 18px; }

/* Viewer */
.viewer-canvas { display: block; width: 100%; height: 100%; touch-action: none; }
.stage .viewer-canvas { cursor: grab; }
.stage .viewer-canvas:active { cursor: grabbing; }
.stage-wrap .viewer-fallback, .card-stage .viewer-fallback { position: absolute; inset: 0; display: grid; place-items: center; margin: 0; padding: 16px; text-align: center; }

/* Detail */
.detail { display: grid; grid-template-columns: minmax(0, 1fr) 360px; gap: 28px; padding-top: 20px; }
.back { grid-column: 1 / -1; color: var(--muted); font-size: 14px; }
.back:hover { color: var(--text); }
.stage-wrap { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; align-self: start; }
.stage { position: relative; height: min(72vh, 760px); min-height: 320px; background: var(--stage); }
.stage-bar { display: flex; align-items: center; gap: 12px; padding: 12px 16px; border-top: 1px solid var(--line); flex-wrap: wrap; }
.stage-bar input[type=range] { flex: 1; min-width: 120px; accent-color: var(--accent); }
.stage-bar .mono { color: var(--muted); font-size: 12px; min-width: 40px; }
.hint { color: var(--muted); font-size: 12px; margin-left: auto; }
.btn { display: inline-flex; align-items: center; padding: 8px 14px; border-radius: 8px; border: 1px solid var(--line); background: var(--panel); font-size: 14px; }
.btn:hover { border-color: var(--accent); }
.btn.ghost[aria-pressed="true"] { border-color: var(--accent); color: var(--accent); }
.info h1 { font-size: 28px; font-weight: 650; letter-spacing: -0.02em; margin-top: 6px; }
.info h3 { font-size: 13px; font-weight: 600; margin: 26px 0 8px; }
.prose { color: var(--text); font-size: 15px; white-space: pre-wrap; }
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 16px; margin-top: 22px; padding: 16px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.stats dt { color: var(--muted); font-size: 12px; }
.stats dd { font-family: var(--mono); font-size: 16px; font-variant-numeric: tabular-nums; }

/* Script */
.code { grid-column: 1 / -1; margin-top: 12px; }
.code-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 10px; }
.code-head h3 { font-size: 15px; font-weight: 600; }
.code-head span { color: var(--muted); font-size: 13px; }
.code-block { display: flex; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); font: 13px/1.6 var(--mono); overflow-x: auto; tab-size: 2; }
.code-block pre { margin: 0; padding: 20px 0; }
.code-block .gutter { padding: 20px 14px; text-align: right; color: #b3b1a9; user-select: none; border-right: 1px solid var(--line); background: var(--stage); position: sticky; left: 0; }
.code-block code { display: block; padding: 0 20px; white-space: pre; }
.code-block .k { color: #8a3fa8; }
.code-block .s { color: #1f5f4a; }
.code-block .n { color: #b45309; }
.code-block .c { color: #8a8880; font-style: italic; }
.code-block .g { color: #1d4ed8; }
.small { color: var(--muted); font-size: 13px; margin-top: 20px; }
.small a { color: var(--accent); }

@media (max-width: 900px) {
  .detail { grid-template-columns: 1fr; }
  .stage { height: min(60vh, 520px); }
  .hint { display: none; }
  .top-note { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  .card, .card-skeleton { transition: none; animation: none; }
}