:root {
  color-scheme: light dark;
  --bg: #f7f7f5;
  --fg: #1d1f21;
  --muted: #5c6166;
  --line: #d9dbdd;
  --card: #ffffff;
  --accent: #1f5fae;
  --badge-bg: #e6e9ed;
  --proto-bg: #fde7c4;
  --proto-fg: #6b4200;
  --stage: #e9ecef;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181b;
    --fg: #e4e6e8;
    --muted: #a0a6ac;
    --line: #33373c;
    --card: #1f2226;
    --accent: #79aef0;
    --badge-bg: #2c3036;
    --proto-bg: #4a3512;
    --proto-fg: #ffd89a;
    --stage: #24282d;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif;
  line-height: 1.6;
}

a { color: var(--accent); }

.wrap { max-width: 1100px; margin: 0 auto; padding: 0 1.25rem; }

.site-header { border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; justify-content: space-between; align-items: center; height: 3.25rem; }
.site-name { font-weight: 700; color: var(--fg); text-decoration: none; font-size: 1.1rem; }
.site-repo { font-size: 0.9rem; }

main { padding-top: 1.5rem; padding-bottom: 3rem; }

.site-footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 0.85rem; padding: 1.25rem 0; }

.intro h1 { margin: 0 0 0.25rem; }
.intro p { color: var(--muted); max-width: 48rem; margin-top: 0; }

.cards {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
}

.card {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  color: inherit;
  text-decoration: none;
}
.card:hover, .card:focus-visible { border-color: var(--accent); }
.card img { width: 100%; aspect-ratio: 4 / 3; object-fit: contain; background: #fff; }
.card-body { padding: 0.9rem 1rem 1rem; }
.card h2 { font-size: 1.1rem; margin: 0 0 0.35rem; }
.card p { margin: 0 0 0.5rem; }

.meta { color: var(--muted); font-size: 0.85rem; display: flex; flex-wrap: wrap; gap: 0.4rem 0.75rem; align-items: center; }

.badge {
  display: inline-block;
  padding: 0 0.5rem;
  border-radius: 4px;
  background: var(--badge-bg);
  color: var(--fg);
  font-size: 0.8rem;
  line-height: 1.6;
}
.badge-prototype { background: var(--proto-bg); color: var(--proto-fg); }

.crumbs { font-size: 0.9rem; color: var(--muted); margin-bottom: 0.5rem; }

.design-head h1 { margin: 0 0 0.25rem; }
.design-head .summary { margin: 0 0 0.5rem; font-size: 1.05rem; }

.viewer { margin: 1.5rem 0 2rem; }
.viewer-stage {
  position: relative;
  aspect-ratio: 16 / 10;
  max-height: 70vh;
  width: 100%;
  background: var(--stage);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}
.viewer-stage canvas { display: block; width: 100%; height: 100%; touch-action: none; }
.viewer-poster { width: 100%; height: 100%; object-fit: contain; background: #fff; }
.viewer-start {
  position: absolute;
  left: 50%;
  bottom: 1rem;
  transform: translateX(-50%);
  padding: 0.55rem 1.1rem;
  border: 0;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.viewer-start:disabled { opacity: 0.7; cursor: progress; }
.viewer-parts { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.6rem; }
.viewer-parts button {
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--card);
  color: var(--fg);
  font: inherit;
  font-size: 0.85rem;
  cursor: pointer;
}
.viewer-parts button[aria-pressed="true"] { border-color: var(--accent); color: var(--accent); font-weight: 600; }
.viewer-info { color: var(--muted); font-size: 0.85rem; margin: 0.4rem 0 0; }

.table { border-collapse: collapse; width: 100%; font-size: 0.92rem; display: block; overflow-x: auto; }
.table th, .table td { border-bottom: 1px solid var(--line); padding: 0.35rem 0.6rem; text-align: left; vertical-align: top; }
.table th { border-bottom-width: 2px; }
.table .num { text-align: right; white-space: nowrap; }
.note { color: var(--muted); font-size: 0.85rem; }

.notes { max-width: 52rem; }
.notes > h2:first-child { margin-top: 2.5rem; }
.notes img { max-width: 100%; height: auto; display: block; margin: 1rem 0; background: #fff; border: 1px solid var(--line); border-radius: 6px; }
.notes pre { background: var(--card); border: 1px solid var(--line); border-radius: 6px; padding: 0.75rem 1rem; overflow-x: auto; }
.notes code { font-size: 0.9em; }