:root {
  color-scheme: light dark;
  --bg: #f6f2ea;
  --surface: #f6f2ea;
  --text: #1f1b17;
  --muted: #6a6258;
  --line: #c9c1b6;
  --accent: #383229;
  --content: 46rem;
  --space-1: 0.75rem;
  --space-2: 1.25rem;
  --space-3: 2rem;
  --space-4: 3rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #151311;
    --surface: #151311;
    --text: #ece5da;
    --muted: #b3a796;
    --line: #4a433c;
    --accent: #f0eadf;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    "Iowan Old Style",
    "Palatino Linotype",
    "URW Palladio L",
    "Book Antiqua",
    Georgia,
    serif;
  line-height: 1.72;
}

html[lang^="zh"] body {
  font-family:
    "Songti TC",
    "Noto Serif TC",
    "PingFang TC",
    "Hiragino Mincho ProN",
    serif;
}

a {
  color: inherit;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.16em;
}

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

.skip-link {
  position: absolute;
  left: 0.75rem;
  top: 0.75rem;
  transform: translateY(-200%);
  background: var(--text);
  color: var(--bg);
  padding: 0.5rem 0.75rem;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-shell {
  width: min(calc(100% - 2rem), var(--content));
  margin: 0 auto;
  padding: var(--space-3) 0 var(--space-4);
}

.site-header {
  padding-bottom: var(--space-2);
  margin-bottom: var(--space-3);
  border-bottom: 1px solid var(--line);
}

.brand-lockup {
  display: grid;
  gap: 0.35rem;
  margin-bottom: var(--space-2);
}

.eyebrow,
.tenet-kicker,
.site-nav,
.language-switch {
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.brand-mark {
  width: fit-content;
  color: var(--text);
  text-decoration: none;
  font-size: clamp(2.3rem, 7vw, 4rem);
  line-height: 1;
}

.brand-subtitle {
  margin: 0;
  font-size: 1.05rem;
  color: var(--text);
}

.language-line {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-nav,
.language-switch {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.site-nav a,
.language-switch a {
  text-decoration: none;
}

.site-nav a:hover,
.language-switch a:hover,
.language-switch a[aria-current="page"] {
  color: var(--text);
  text-decoration: underline;
}

.intro-block {
  margin-bottom: var(--space-3);
}

.intro-block h1 {
  margin: 0 0 var(--space-1);
  font-size: clamp(2rem, 6vw, 3.6rem);
  line-height: 1.02;
  font-weight: 400;
}

.lede {
  margin: 0;
  font-size: 1.15rem;
  color: var(--text);
}

.section-block {
  padding-top: var(--space-2);
  margin-top: var(--space-2);
  border-top: 1px solid var(--line);
}

.section-head {
  margin-bottom: var(--space-2);
}

.section-head h2,
.prose h2 {
  margin: 0 0 var(--space-1);
  font-size: 1.15rem;
  font-weight: 400;
}

.prose p,
.section-head p {
  margin: 0 0 1rem;
}

.prose p:last-child,
.section-head p:last-child {
  margin-bottom: 0;
}

.doctrine-list,
.language-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.doctrine-item,
.language-item {
  padding: var(--space-2) 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: var(--space-3);
}

.doctrine-item:last-child,
.language-item:last-child {
  border-bottom: 1px solid var(--line);
}

.doctrine-item h2,
.language-item h2 {
  margin: 0 0 0.5rem;
  font-size: 1.5rem;
  font-weight: 400;
}

.tenet-short {
  margin: 0 0 0.75rem;
  font-style: italic;
  color: var(--text);
}

.tenet-gloss,
.language-card__summary,
.language-card__action {
  margin: 0;
}

.language-card__action {
  margin-top: 0.75rem;
}

@media (max-width: 640px) {
  .site-shell {
    width: min(calc(100% - 1.25rem), var(--content));
    padding-top: 1.2rem;
  }

  .site-nav,
  .language-switch {
    gap: 0.75rem;
  }

  .doctrine-item h2,
  .language-item h2 {
    font-size: 1.3rem;
  }
}