:root {
  color-scheme: light dark;
  --bg: #faf8f5;
  --card: #ffffff;
  --text: #1d1d1f;
  --text-dim: #6b6b76;
  --border: #e8e4dc;
  --accent: #b5654a;
  --accent-soft: #f3e4dc;
  --term-bg: #fff0c8;
  --diagram-bg: #f4efe6;
  --diagram-line: #8a6a55;
  --diagram-highlight: #d97a52;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14120f;
    --card: #1d1a16;
    --text: #f2efe9;
    --text-dim: #a39a8c;
    --border: #322c24;
    --accent: #e08a63;
    --accent-soft: #3a2a22;
    --term-bg: #4a3d10;
    --diagram-bg: #211d18;
    --diagram-line: #c9b6a3;
    --diagram-highlight: #e0895f;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Pretendard, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}
.topnav {
  position: sticky;
  top: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}
.topnav-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  overflow-x: auto;
  white-space: nowrap;
}
.topnav a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.76rem;
  padding: 5px 9px;
  border-radius: 999px;
}
.topnav a.brand { color: var(--text); font-weight: 700; font-size: 0.9rem; padding-right: 4px; }
.topnav a.active, .topnav a:hover { background: var(--accent-soft); color: var(--accent); }

main { max-width: 720px; margin: 0 auto; padding: 16px 16px 60px; }
h1.page-title { font-size: 1.4rem; margin: 0 0 4px; }
.page-sub { color: var(--text-dim); font-size: 0.88rem; margin: 0 0 20px; }
h2.section-title { font-size: 1.12rem; margin: 26px 0 8px; color: var(--accent); }
p { font-size: 1rem; margin: 0 0 12px; }

.term {
  background: var(--term-bg);
  padding: 0 4px;
  border-radius: 4px;
  text-decoration: none;
  color: inherit;
  font-weight: 600;
  border-bottom: 1px dashed var(--text-dim);
}
.term:hover { filter: brightness(1.1); }

.callout {
  background: var(--card);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  padding: 10px 14px;
  margin: 14px 0;
  font-size: 0.92rem;
}
.callout .callout-title { font-weight: 700; margin-bottom: 4px; }

.diagram {
  background: var(--diagram-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  margin: 14px 0;
  text-align: center;
}
.diagram svg { max-width: 100%; height: auto; }
.diagram figcaption { font-size: 0.8rem; color: var(--text-dim); margin-top: 6px; }

.term-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 10px; margin: 10px 0 20px; }
.term-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
}
.term-card h3 { margin: 0 0 4px; font-size: 0.96rem; }
.term-card p { margin: 0; font-size: 0.86rem; color: var(--text-dim); }

.pose-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 18px;
  margin-bottom: 14px;
}
.pose-card h3 { margin: 0 0 2px; font-size: 1.05rem; }
.pose-sanskrit { color: var(--text-dim); font-size: 0.82rem; margin-bottom: 8px; }
.pose-icon { font-size: 1.6rem; margin-right: 6px; }
.pose-fields { display: flex; flex-direction: column; gap: 4px; font-size: 0.9rem; }
.pose-fields b { color: var(--accent); }
.pose-caution { color: var(--diagram-highlight); font-size: 0.85rem; margin-top: 4px; }

.chapter-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 24px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
}
.chapter-nav a { color: var(--accent); text-decoration: none; }
.chapter-nav a:hover { text-decoration: underline; }

.glossary-entry {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
  margin-bottom: 10px;
  scroll-margin-top: 60px;
}
.glossary-entry h3 { margin: 0 0 4px; font-size: 0.98rem; }
.glossary-entry p { margin: 0; font-size: 0.88rem; color: var(--text-dim); }
.glossary-entry .glossary-tag {
  font-size: 0.68rem;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 1px 8px;
  margin-left: 8px;
}

.toc-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.toc-list a {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
  color: var(--text);
  text-decoration: none;
}
.toc-list a:hover { border-color: var(--accent); }
.toc-num { color: var(--accent); font-weight: 700; margin-right: 8px; }
.toc-desc { display: block; color: var(--text-dim); font-size: 0.85rem; margin-top: 3px; }