:root {
  --c-ink: #1a1a1a;
  --c-text: #2a2a2a;
  --c-muted: #6b6b6b;
  --c-bg: #fdfaf6;
  --c-card: #ffffff;
  --c-border: #e8e2d8;
  --c-primary: #1a4d6e;
  --c-primary-hover: #143d57;
  --c-accent: #c66b1c;
  --c-accent-soft: #fdf0e0;
  --c-evidence: #2d6a4f;
  --c-evidence-soft: #e8f1ec;
  --c-warn: #8b3a1b;
  --c-warn-soft: #fbeae0;
  --c-quote-bg: #f5efe5;
  --serif: 'Source Serif Pro', 'EB Garamond', Georgia, 'Times New Roman', serif;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Inter, Roboto, 'Helvetica Neue', Arial, sans-serif;
  --shadow-sm: 0 1px 2px rgba(26, 77, 110, 0.04);
  --shadow-md: 0 4px 12px rgba(26, 77, 110, 0.08);
  --radius: 4px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--sans);
  font-size: 18px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.wrap { max-width: 720px; margin: 0 auto; padding: 0 24px; }
.wrap-wide { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

.site-header {
  border-bottom: 1px solid var(--c-border);
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(8px);
  background: rgba(253, 250, 246, 0.92);
}
.site-header .wrap-wide {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--c-primary);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.brand-mark { color: var(--c-accent); }
.nav { display: flex; gap: 22px; flex-wrap: wrap; }
.nav a {
  color: var(--c-text);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  border-bottom: 2px solid transparent;
  padding-bottom: 2px;
  transition: border-color 0.15s, color 0.15s;
}
.nav a:hover, .nav a.active { color: var(--c-primary); border-color: var(--c-accent); }

.hero {
  padding: 80px 0 64px;
  border-bottom: 1px solid var(--c-border);
  background: linear-gradient(180deg, #fdfaf6 0%, #f8f1e6 100%);
}
.hero h1 {
  font-family: var(--serif);
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.1;
  margin: 0 0 24px;
  color: var(--c-ink);
  letter-spacing: -0.02em;
  font-weight: 600;
}
.hero .lede {
  font-size: 1.25rem;
  line-height: 1.55;
  color: var(--c-text);
  margin: 0 0 32px;
  max-width: 640px;
}
.hero .meta {
  display: flex;
  gap: 18px;
  align-items: center;
  flex-wrap: wrap;
  font-size: 0.9rem;
  color: var(--c-muted);
}
.hero .meta-item { display: flex; align-items: center; gap: 6px; }
.hero .meta-item::before { content: '✓'; color: var(--c-evidence); font-weight: 700; }

h1, h2, h3, h4 {
  font-family: var(--serif);
  color: var(--c-ink);
  letter-spacing: -0.015em;
  font-weight: 600;
}
h2 { font-size: 1.85rem; line-height: 1.2; margin: 56px 0 20px; }
h3 { font-size: 1.35rem; line-height: 1.3; margin: 40px 0 14px; }
h4 { font-size: 1.1rem; line-height: 1.35; margin: 28px 0 10px; color: var(--c-primary); }
p { margin: 0 0 18px; }
strong { color: var(--c-ink); font-weight: 600; }

a {
  color: var(--c-primary);
  text-decoration: underline;
  text-decoration-color: var(--c-accent);
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
a:hover { text-decoration-thickness: 2px; }

ul, ol { padding-left: 22px; margin: 0 0 18px; }
li { margin-bottom: 8px; }

.article { padding: 56px 0 80px; }
.article .breadcrumb {
  font-size: 0.85rem;
  color: var(--c-muted);
  margin-bottom: 24px;
}
.article .breadcrumb a { color: var(--c-muted); text-decoration: none; }
.article .breadcrumb a:hover { color: var(--c-primary); }
.article .kicker {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 16px;
}
.article h1 {
  font-size: clamp(2rem, 4.5vw, 2.8rem);
  line-height: 1.15;
  margin: 0 0 20px;
}
.article .deck {
  font-size: 1.2rem;
  line-height: 1.55;
  color: var(--c-muted);
  font-style: italic;
  margin: 0 0 40px;
  font-family: var(--serif);
}
.article .source-line {
  font-size: 0.85rem;
  color: var(--c-muted);
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
  padding: 14px 0;
  margin: 0 0 40px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.article .source-line::before { content: '📚'; font-size: 1rem; }

.table-wrap {
  margin: 24px 0 28px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  overflow-x: auto;
  background: var(--c-card);
}
table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
th, td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--c-border);
  vertical-align: top;
}
th {
  background: #f7f1e7;
  font-weight: 600;
  color: var(--c-ink);
  font-family: var(--sans);
  font-size: 0.9rem;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: #fbf6ec; }

.box {
  padding: 22px 26px;
  border-radius: var(--radius);
  margin: 28px 0;
  border-left: 4px solid var(--c-primary);
  background: var(--c-card);
  box-shadow: var(--shadow-sm);
}
.box.evidence { background: var(--c-evidence-soft); border-color: var(--c-evidence); }
.box.evidence .box-label { color: var(--c-evidence); }
.box.warn { background: var(--c-warn-soft); border-color: var(--c-warn); }
.box.warn .box-label { color: var(--c-warn); }
.box.summary {
  background: var(--c-quote-bg);
  border-color: var(--c-accent);
  font-family: var(--serif);
  font-size: 1.08rem;
  line-height: 1.6;
}
.box.summary .box-label { color: var(--c-accent); }
.box-label {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 8px;
  color: var(--c-primary);
  font-family: var(--sans);
}
.box p:last-child { margin-bottom: 0; }

blockquote {
  font-family: var(--serif);
  font-size: 1.3rem;
  line-height: 1.5;
  font-style: italic;
  color: var(--c-ink);
  margin: 36px 0;
  padding: 0 0 0 24px;
  border-left: 3px solid var(--c-accent);
}
blockquote cite {
  display: block;
  font-size: 0.9rem;
  font-style: normal;
  color: var(--c-muted);
  margin-top: 12px;
  font-family: var(--sans);
}

.hub {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin: 32px 0 48px;
}
.hub-card {
  display: block;
  padding: 26px 28px;
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--c-text);
  transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
  box-shadow: var(--shadow-sm);
}
.hub-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--c-primary);
}
.hub-card .card-kicker {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--c-accent);
  margin-bottom: 10px;
}
.hub-card h3 { margin: 0 0 8px; font-size: 1.2rem; line-height: 1.3; color: var(--c-primary); }
.hub-card p { margin: 0; color: var(--c-muted); font-size: 0.95rem; line-height: 1.5; }
.hub-card .card-cta {
  display: inline-block;
  margin-top: 14px;
  font-size: 0.9rem;
  color: var(--c-primary);
  font-weight: 600;
}
.hub-card .card-cta::after { content: ' →'; }

.cta-btn {
  display: inline-block;
  padding: 14px 28px;
  background: var(--c-accent);
  color: #fff;
  text-decoration: none;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}
.cta-btn:hover { background: #a85812; transform: translateY(-1px); color: #fff; }
.cta-btn.secondary {
  background: transparent;
  color: var(--c-primary);
  border: 1.5px solid var(--c-primary);
}
.cta-btn.secondary:hover { background: var(--c-primary); color: #fff; }

.book-block {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 32px;
  margin: 48px 0;
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 28px;
  align-items: center;
  box-shadow: var(--shadow-md);
}
.book-cover {
  width: 100%;
  aspect-ratio: 2/3;
  background: linear-gradient(135deg, #1a4d6e 0%, #2d6a4f 100%);
  border-radius: 2px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.18), 4px 4px 0 rgba(0,0,0,0.08);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 18px 14px;
  color: #fff;
  font-family: var(--serif);
  text-align: center;
}
.book-cover .book-title {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.2;
}
.book-cover .book-sub {
  font-size: 0.65rem;
  opacity: 0.85;
  font-style: italic;
  line-height: 1.3;
}
.book-cover .book-author {
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0.75;
}
.book-block h3 { margin: 0 0 10px; color: var(--c-ink); font-size: 1.4rem; }
.book-block .book-meta { font-size: 0.85rem; color: var(--c-muted); margin-bottom: 14px; }
.book-block p { margin-bottom: 18px; }
.book-block .book-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.references {
  margin: 56px 0 0;
  padding: 28px 0 0;
  border-top: 1px solid var(--c-border);
}
.references h3 {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin: 0 0 16px;
  color: var(--c-muted);
}
.references ol {
  font-size: 0.85rem;
  color: var(--c-muted);
  line-height: 1.55;
  padding-left: 22px;
}
.references li { margin-bottom: 10px; }

.site-footer {
  margin-top: 80px;
  padding: 40px 0 32px;
  border-top: 1px solid var(--c-border);
  background: #f3ebdd;
}
.site-footer .footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px;
  margin-bottom: 32px;
}
.site-footer h4 {
  font-family: var(--sans);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--c-muted);
  margin: 0 0 14px;
  font-weight: 700;
}
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 8px; }
.site-footer a { color: var(--c-text); text-decoration: none; font-size: 0.92rem; }
.site-footer a:hover { color: var(--c-primary); text-decoration: underline; }
.site-footer .legal {
  border-top: 1px solid var(--c-border);
  padding-top: 20px;
  font-size: 0.8rem;
  color: var(--c-muted);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.medical-disclaimer {
  background: var(--c-quote-bg);
  border: 1px solid var(--c-border);
  padding: 18px 22px;
  border-radius: var(--radius);
  font-size: 0.85rem;
  color: var(--c-muted);
  margin: 32px 0;
  line-height: 1.55;
}
.medical-disclaimer strong { color: var(--c-warn); }

@media (max-width: 700px) {
  body { font-size: 17px; }
  .hero { padding: 56px 0 48px; }
  .article { padding: 40px 0 64px; }
  .nav { gap: 14px; }
  .nav a { font-size: 0.85rem; }
  .book-block { grid-template-columns: 1fr; text-align: center; }
  .book-block .book-cover { max-width: 200px; margin: 0 auto; }
  .book-block .book-actions { justify-content: center; }
  h2 { font-size: 1.55rem; margin-top: 44px; }
  blockquote { font-size: 1.15rem; }
  table { font-size: 0.88rem; }
  th, td { padding: 10px 12px; }
}

@media (max-width: 480px) {
  .site-header .wrap-wide { flex-direction: column; align-items: flex-start; }
  .nav { width: 100%; justify-content: flex-start; }
}