/* Institute for Biological Design — Shared CSS
   Built on the peptidedosages.info design system (cream + forest green)
   with the institute's gold + section colors preserved as category accents. */

:root {
  --bg: #f5f3ef;
  --surface: #ffffff;
  --ink: #1a1814;
  --ink-soft: #5a5550;
  --accent: #2d5a3d;
  --accent-deep: #1e3d2a;
  --accent-warm: #c9a14a;        /* institute gold (secondary) */
  --accent-warm-deep: #8b6b1f;
  --accent-light: #e8f0ea;
  --gold-light: #faf3df;
  --border: #ddd9d3;
  --serif: 'DM Serif Display', serif;
  --sans: 'DM Sans', sans-serif;

  /* Twelve section accents */
  --c-metabolic: #c2640d;       --c-metabolic-light: #fdebd6;
  --c-repair: #0f766e;          --c-repair-light: #d8efe9;
  --c-inflammation: #236b8e;    --c-inflammation-light: #d6e8f1;
  --c-growth: #a07517;          --c-growth-light: #f3e8c8;
  --c-neuro: #5b3a8a;           --c-neuro-light: #e3d8f0;
  --c-immune: #a8301c;          --c-immune-light: #f3d6cf;
  --c-melano: #9a5b21;          --c-melano-light: #f1ddc4;
  --c-endocrine: #a8336a;       --c-endocrine-light: #f1d6e2;
  --c-longevity: #2c3a85;       --c-longevity-light: #d4d8ec;
  --c-cartilage: #5e6b1f;       --c-cartilage-light: #e3e7c8;
  --c-sleep: #1f2266;           --c-sleep-light: #cfd1e6;
  --c-oxidative: #0d6660;       --c-oxidative-light: #cce5e2;
}
* , *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--sans); background: var(--bg); color: var(--ink); line-height: 1.6; -webkit-font-smoothing: antialiased; }

/* ─────────── NAV ─────────── */
nav.site-nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(245,243,239,0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  padding: 0 5%;
  display: flex; align-items: center; gap: 32px; height: 64px;
}
.nav-logo { display: flex; align-items: center; gap: 12px; text-decoration: none; margin-right: auto; }
.nav-logo-mark {
  width: 38px; height: 38px;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: var(--accent-warm); font-family: var(--serif); font-size: 1rem; font-style: italic; font-weight: 700;
  letter-spacing: .5px;
}
.nav-logo-text { font-family: var(--serif); font-size: 1.2rem; color: var(--ink); line-height: 1.1; }
.nav-logo-text small { display: block; font-family: var(--sans); font-size: 0.62rem; color: var(--ink-soft); letter-spacing: .14em; text-transform: uppercase; font-weight: 500; margin-top: 1px; }
nav.site-nav a:not(.nav-logo) { color: var(--ink-soft); text-decoration: none; font-size: 0.875rem; font-weight: 500; transition: color .2s; }
nav.site-nav a:not(.nav-logo):hover { color: var(--accent); }
nav.site-nav a.is-active { color: var(--accent); }
.nav-cta {
  background: var(--accent); color: white !important;
  padding: 9px 20px; border-radius: 6px; font-weight: 600 !important;
  transition: background .2s !important;
}
.nav-cta:hover { background: var(--accent-deep) !important; color: white !important; }

/* ─────────── DISCLAIMER BANNER ─────────── */
.disclaimer-banner {
  background: #fef9ed; border-top: 2px solid #f0d060; border-bottom: 2px solid #f0d060;
  padding: 12px 5%; font-size: 0.8rem; color: #7a6520; text-align: center;
}
.disclaimer-banner strong { color: #5a4510; }

/* ─────────── BUTTONS ─────────── */
.btn-primary {
  background: var(--accent); color: white; text-decoration: none;
  padding: 13px 26px; border-radius: 8px; font-weight: 600; font-size: 0.92rem;
  display: inline-flex; align-items: center; gap: 8px;
  transition: background .2s, transform .1s; cursor: pointer; border: none;
  font-family: var(--sans);
}
.btn-primary:hover { background: var(--accent-deep); transform: translateY(-1px); }
.btn-outline {
  background: transparent; color: var(--ink); text-decoration: none;
  padding: 13px 26px; border-radius: 8px; font-weight: 500; font-size: 0.92rem;
  border: 1.5px solid var(--border); transition: border-color .2s, color .2s;
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer; font-family: var(--sans);
}
.btn-outline:hover { border-color: var(--ink); color: var(--ink); }

/* ─────────── SECTION SHELL ─────────── */
.section { padding: 80px 5%; max-width: 1240px; margin: 0 auto; }
.section.compact { padding: 56px 5%; }
.section-header { margin-bottom: 40px; max-width: 760px; }
.section-label {
  font-size: 0.75rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 12px; display: inline-flex; align-items: center; gap: 8px;
}
.section-label::before { content: ""; display: inline-block; width: 22px; height: 1px; background: var(--accent-warm); }
.section-header h2 { font-family: var(--serif); font-size: clamp(1.9rem, 3vw, 2.7rem); line-height: 1.15; color: var(--ink); }
.section-header h2 em { color: var(--accent); font-style: italic; }
.section-header p { font-size: 1rem; color: var(--ink-soft); margin-top: 14px; line-height: 1.65; }

/* ─────────── BREADCRUMB ─────────── */
.breadcrumb {
  display: flex; gap: 8px; align-items: center; flex-wrap: wrap;
  font-size: 0.8rem; color: var(--ink-soft); margin-bottom: 24px;
}
.breadcrumb a { color: var(--accent); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span.sep { color: var(--border); }

/* ─────────── PAGE LAYOUT (TOC + main) ─────────── */
.page-layout {
  max-width: 1240px; margin: 0 auto; padding: 40px 5% 80px;
  display: grid; grid-template-columns: 260px 1fr; gap: 56px; align-items: start;
}
.toc {
  position: sticky; top: 80px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  padding: 22px 22px;
}
.toc h4 {
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--ink-soft); margin-bottom: 14px;
}
.toc a {
  display: block; text-decoration: none; color: var(--ink-soft);
  font-size: 0.83rem; padding: 7px 0 7px 14px;
  border-left: 2px solid var(--border); margin-bottom: 2px;
  transition: color .2s, border-color .2s;
  line-height: 1.4;
}
.toc a:hover, .toc a.is-active { color: var(--accent); border-color: var(--accent); }
.toc-progress {
  height: 3px; background: var(--accent-light); border-radius: 2px;
  margin-bottom: 16px; overflow: hidden;
}
.toc-progress > span {
  display: block; height: 100%; background: var(--accent);
  width: 0; transition: width .15s linear;
}

/* ─────────── HERO ─────────── */
.hero {
  padding: 80px 5% 60px;
  display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center;
  max-width: 1240px; margin: 0 auto;
}
.hero h1 {
  font-family: var(--serif); font-size: clamp(2.3rem, 4.6vw, 3.6rem);
  line-height: 1.08; margin-bottom: 22px; color: var(--ink);
  letter-spacing: -.5px;
}
.hero h1 em { color: var(--accent); font-style: italic; }
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--accent-light); color: var(--accent);
  font-size: 0.76rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase;
  padding: 6px 14px; border-radius: 99px; margin-bottom: 20px;
}
.hero-eyebrow::before { content: ''; width: 6px; height: 6px; background: var(--accent); border-radius: 50%; }
.hero p { font-size: 1.04rem; color: var(--ink-soft); line-height: 1.7; margin-bottom: 28px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-visual {
  background: var(--surface); border-radius: 16px; border: 1px solid var(--border);
  padding: 28px; box-shadow: 0 10px 40px rgba(0,0,0,0.06);
}
.stat-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 14px; }
.stat-card { background: var(--bg); border-radius: 10px; padding: 18px; }
.stat-card .num { font-family: var(--serif); font-size: 2.1rem; color: var(--accent); line-height: 1; }
.stat-card .num em { color: var(--accent-warm); font-style: italic; }
.stat-card .label { font-size: 0.76rem; color: var(--ink-soft); margin-top: 6px; }
.trust-badges { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 14px; }
.badge-pill {
  background: var(--accent-light); color: var(--accent);
  font-size: 0.74rem; font-weight: 600; padding: 6px 12px; border-radius: 6px;
}
.badge-pill.gold { background: var(--gold-light); color: var(--accent-warm-deep); }

/* ─────────── CARD GRIDS ─────────── */
.card-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.card-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.card-grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }

/* category card (12 sections) */
.cat-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  padding: 26px 24px; text-decoration: none; color: inherit; display: block;
  transition: border-color .2s, transform .15s, box-shadow .2s;
  position: relative; overflow: hidden;
}
.cat-card::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
  background: var(--cat-color, var(--accent));
  transition: width .2s;
}
.cat-card:hover { border-color: var(--cat-color, var(--accent)); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(0,0,0,.06); }
.cat-card:hover::before { width: 6px; }
.cat-num {
  font-family: var(--serif); font-size: 2.2rem; font-style: italic;
  color: var(--cat-color, var(--accent)); line-height: 1; margin-bottom: 12px;
}
.cat-card h3 { font-family: var(--serif); font-size: 1.15rem; line-height: 1.25; margin-bottom: 8px; color: var(--ink); }
.cat-card .cat-desc { font-size: 0.84rem; color: var(--ink-soft); line-height: 1.55; margin-bottom: 14px; }
.cat-meta {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 14px; border-top: 1px solid var(--border);
  font-size: 0.78rem;
}
.cat-meta .count { color: var(--cat-color, var(--accent)); font-weight: 700; }
.cat-meta .arrow { color: var(--ink-soft); }

/* peptide card (browse) */
.peptide-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  padding: 22px 22px 18px; text-decoration: none; color: inherit; display: block;
  transition: box-shadow .2s, transform .15s, border-color .2s;
}
.peptide-card:hover { box-shadow: 0 6px 26px rgba(0,0,0,0.08); transform: translateY(-2px); border-color: var(--cat-color, var(--accent)); }
.peptide-card .card-tag {
  display: inline-block; font-size: 0.68rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--cat-color, var(--accent-warm-deep));
  background: var(--cat-color-light, var(--gold-light));
  padding: 4px 10px; border-radius: 4px; margin-bottom: 12px;
}
.peptide-card h3 { font-family: var(--serif); font-size: 1.18rem; line-height: 1.25; margin-bottom: 6px; color: var(--ink); }
.peptide-card .sub { font-size: 0.74rem; color: var(--ink-soft); letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 12px; font-weight: 600; }
.peptide-card p { font-size: 0.86rem; color: var(--ink-soft); line-height: 1.55; margin-bottom: 14px; }
.peptide-card .meta { display: flex; gap: 6px; flex-wrap: wrap; }
.meta-pill {
  background: var(--bg); border: 1px solid var(--border);
  font-size: 0.7rem; font-weight: 500; padding: 4px 10px; border-radius: 99px;
  color: var(--ink-soft);
}
.meta-pill.fda { background: var(--accent); color: white; border-color: var(--accent); }
.meta-pill.research { background: white; color: #a8301c; border-color: #a8301c; }
.peptide-card .arrow {
  margin-top: 14px; font-size: 0.82rem; font-weight: 600;
  color: var(--cat-color, var(--accent));
  display: inline-flex; align-items: center; gap: 6px;
}

/* guide card */
.guide-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  padding: 24px; text-decoration: none; color: inherit;
  transition: box-shadow .2s, transform .15s;
  display: block;
}
.guide-card:hover { box-shadow: 0 4px 20px rgba(0,0,0,0.08); transform: translateY(-2px); }
.guide-num { font-family: var(--serif); font-size: 2.5rem; color: var(--border); line-height: 1; margin-bottom: 12px; font-style: italic; }
.guide-card h3 { font-family: var(--serif); font-size: 1.1rem; margin-bottom: 8px; }
.guide-card p { font-size: 0.83rem; color: var(--ink-soft); line-height: 1.55; }

/* ─────────── PROTOCOL TAG (category badge on header) ─────────── */
.protocol-tag {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--cat-color-light, var(--accent-light));
  color: var(--cat-color, var(--accent));
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  padding: 6px 14px; border-radius: 99px; margin-bottom: 16px;
}

/* ─────────── ACCORDION (peptide entries) ─────────── */
.accordion { display: flex; flex-direction: column; gap: 14px; }
.accord {
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  overflow: hidden; transition: box-shadow .2s, border-color .2s;
}
.accord.is-open { box-shadow: 0 6px 30px rgba(0,0,0,0.06); border-color: var(--cat-color, var(--accent-warm)); }
.accord-head {
  width: 100%; background: transparent; border: none; cursor: pointer;
  display: grid; grid-template-columns: auto 1fr auto; gap: 18px; align-items: center;
  padding: 22px 26px; text-align: left;
  font-family: var(--sans); color: inherit;
  border-left: 4px solid var(--cat-color, var(--accent));
}
.accord-head:hover { background: var(--bg); }
.accord-num {
  font-family: var(--serif); font-size: 1.6rem; font-style: italic; line-height: 1;
  color: var(--cat-color, var(--accent)); min-width: 36px;
}
.accord-title h3 {
  font-family: var(--serif); font-size: 1.4rem; line-height: 1.2; margin-bottom: 2px; color: var(--ink); font-weight: 600;
}
.accord-title h3 small { font-family: var(--sans); font-size: 0.78rem; color: var(--ink-soft); font-weight: 500; margin-left: 6px; }
.accord-title .accord-sub { font-size: 0.74rem; color: var(--ink-soft); letter-spacing: 0.08em; text-transform: uppercase; font-weight: 600; }
.accord-icon {
  width: 32px; height: 32px; border-radius: 50%;
  background: var(--bg); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  transition: transform .25s, background .2s;
  color: var(--cat-color, var(--accent));
}
.accord.is-open .accord-icon { background: var(--cat-color-light, var(--accent-light)); transform: rotate(180deg); }
.accord-body {
  display: none; padding: 4px 26px 30px;
  border-top: 1px dashed var(--border);
}
.accord.is-open .accord-body { display: grid; grid-template-columns: 1fr 280px; gap: 36px; padding-top: 26px; }

.accord-body p { font-size: 0.95rem; color: var(--ink-soft); line-height: 1.75; margin-bottom: 14px; }
.accord-body h4 {
  font-family: var(--sans); font-size: 0.78rem; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--cat-color, var(--accent));
  margin: 26px 0 12px; display: flex; align-items: center; gap: 10px;
}
.accord-body h4::after { content: ""; flex: 1; height: 1px; background: var(--border); }
.accord-body ul { list-style: none; padding-left: 0; }
.accord-body ul li {
  font-size: 0.93rem; color: var(--ink-soft); line-height: 1.65;
  padding: 9px 0 9px 24px; position: relative;
  border-bottom: 1px solid var(--border);
}
.accord-body ul li:last-child { border-bottom: none; }
.accord-body ul li::before {
  content: ""; position: absolute; left: 0; top: 17px;
  width: 12px; height: 1px; background: var(--cat-color, var(--accent));
}

/* analogy / impact / pairings inside accord-body */
.analogy-box {
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px;
  padding: 18px 20px; margin: 18px 0; display: flex; gap: 14px; align-items: flex-start;
}
.analogy-box .ico {
  flex-shrink: 0; width: 38px; height: 38px;
  background: var(--cat-color-light, var(--accent-light));
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  color: var(--cat-color, var(--accent));
}
.analogy-box .text { font-size: 0.9rem; line-height: 1.6; color: var(--ink-soft); font-style: italic; }
.analogy-box .text strong {
  font-style: normal; color: var(--ink); display: block;
  font-size: 0.7rem; letter-spacing: 0.12em; text-transform: uppercase; font-weight: 700;
  margin-bottom: 4px;
}
.impact-box {
  background: linear-gradient(135deg, var(--cat-color-light, var(--accent-light)) 0%, var(--surface) 100%);
  border-left: 4px solid var(--cat-color, var(--accent));
  padding: 18px 22px; margin: 18px 0; border-radius: 0 8px 8px 0;
}
.impact-box .impact-label {
  font-size: 0.7rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--cat-color, var(--accent)); font-weight: 700; margin-bottom: 8px;
}
.impact-box p { font-size: 0.92rem; line-height: 1.65; color: var(--ink-soft); margin: 0; }
.pairings { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.pairing-chip {
  background: var(--surface); border: 1px solid var(--border); border-radius: 99px;
  padding: 6px 14px; font-size: 0.82rem; color: var(--ink-soft);
  display: inline-flex; align-items: center; gap: 8px;
}
.pairing-chip .pin { width: 6px; height: 6px; border-radius: 50%; background: var(--cat-color, var(--accent)); }

/* facts side card */
.facts-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  padding: 22px 20px; align-self: start;
}
.facts-card h5 {
  font-size: 0.7rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--cat-color, var(--accent)); font-weight: 700;
  margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--border);
}
.fact { margin-bottom: 14px; }
.fact .label { font-size: 0.66rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-soft); font-weight: 600; margin-bottom: 4px; }
.fact .val { font-size: 0.86rem; color: var(--ink); font-weight: 500; line-height: 1.4; }
.fact .val.mono { font-family: 'JetBrains Mono', ui-monospace, monospace; font-size: 0.78rem; }
.badge-row { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }
.fact-badge {
  font-size: 0.66rem; padding: 3px 8px; border-radius: 4px;
  background: var(--bg); color: var(--ink-soft);
  letter-spacing: 0.04em; font-weight: 600; border: 1px solid var(--border);
}
.fact-badge.fda { background: var(--accent); color: white; border-color: var(--accent); }
.fact-badge.research { background: white; color: #a8301c; border-color: #a8301c; }
.fact-badge.phase { background: var(--c-metabolic); color: white; border-color: var(--c-metabolic); }

/* ─────────── INTERACTIVE: SEARCH + FILTERS ─────────── */
.browse-controls {
  display: grid; grid-template-columns: 1fr auto; gap: 16px; align-items: center;
  margin-bottom: 28px; padding-bottom: 22px; border-bottom: 1px solid var(--border);
}
.search-bar {
  position: relative;
}
.search-bar input {
  width: 100%; padding: 14px 16px 14px 46px;
  border: 1.5px solid var(--border); border-radius: 10px;
  background: var(--surface); color: var(--ink);
  font-family: var(--sans); font-size: 0.95rem;
  transition: border-color .2s, box-shadow .2s;
}
.search-bar input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-light); }
.search-bar svg {
  position: absolute; left: 16px; top: 50%; transform: translateY(-50%);
  color: var(--ink-soft); pointer-events: none;
}
.search-clear {
  position: absolute; right: 12px; top: 50%; transform: translateY(-50%);
  background: var(--bg); border: none; border-radius: 50%;
  width: 26px; height: 26px; cursor: pointer; color: var(--ink-soft);
  display: none; align-items: center; justify-content: center;
}
.search-bar input:not(:placeholder-shown) + .search-clear { display: flex; }
.result-count { font-size: 0.85rem; color: var(--ink-soft); white-space: nowrap; }
.result-count strong { color: var(--ink); }

.filter-chips {
  display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 28px;
}
.chip {
  background: var(--surface); border: 1.5px solid var(--border); border-radius: 99px;
  padding: 8px 16px; font-size: 0.82rem; font-weight: 500; color: var(--ink-soft);
  cursor: pointer; transition: all .15s; font-family: var(--sans);
  display: inline-flex; align-items: center; gap: 8px;
}
.chip:hover { border-color: var(--ink-soft); color: var(--ink); }
.chip .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--chip-color, var(--accent)); }
.chip[aria-pressed="true"] {
  background: var(--chip-color, var(--accent));
  border-color: var(--chip-color, var(--accent)); color: white;
}
.chip[aria-pressed="true"] .dot { background: rgba(255,255,255,.85); }
.chip-all { --chip-color: var(--ink); }
.empty-state {
  text-align: center; padding: 60px 20px; color: var(--ink-soft);
  background: var(--surface); border: 1px dashed var(--border); border-radius: 12px;
}
.empty-state h3 { font-family: var(--serif); font-size: 1.4rem; color: var(--ink); margin-bottom: 8px; }

/* ─────────── DARK SECTIONS ─────────── */
.dark-section {
  background: linear-gradient(160deg, #051a24 0%, #0a2e3a 50%, #1e3d2a 100%);
  color: #f8f3e3; padding: 80px 5%;
  position: relative; overflow: hidden;
}
.dark-section::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 15% 25%, rgba(201,161,74,.08) 1px, transparent 1px),
    radial-gradient(circle at 75% 75%, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 48px 48px, 64px 64px; pointer-events: none;
}
.dark-inner { max-width: 1200px; margin: 0 auto; position: relative; z-index: 1; }
.dark-section .section-label { color: var(--accent-warm); }
.dark-section .section-label::before { background: var(--accent-warm); }
.dark-section h2 {
  font-family: var(--serif); font-size: clamp(2rem, 3.5vw, 3rem); line-height: 1.15;
  color: #fff; margin-bottom: 18px;
}
.dark-section h2 em { color: var(--accent-warm); font-style: italic; }
.dark-section p { color: rgba(255,255,255,0.78); }

.why-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.why-points { display: flex; flex-direction: column; gap: 24px; }
.why-point { display: flex; gap: 16px; align-items: flex-start; }
.why-point .icon {
  flex-shrink: 0; width: 40px; height: 40px;
  background: rgba(201,161,74,.15); border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: var(--accent-warm);
}
.why-point h4 { font-size: 0.98rem; font-weight: 600; color: #fff; margin-bottom: 4px; }
.why-point p { font-size: 0.86rem; color: rgba(255,255,255,0.72); line-height: 1.55; }

/* ─────────── SECTION HERO (per category) ─────────── */
.cat-hero {
  position: relative; overflow: hidden;
  padding: 70px 5% 56px; color: white;
}
.cat-hero .inner { max-width: 1240px; margin: 0 auto; position: relative; z-index: 2; }
.cat-hero .num {
  position: absolute; top: 30px; right: 5%;
  font-family: var(--serif); font-size: clamp(5rem, 12vw, 10rem); font-style: italic;
  color: rgba(255,255,255,0.13); line-height: 1; z-index: 1; pointer-events: none;
}
.cat-hero .eyebrow {
  font-size: 0.74rem; letter-spacing: 0.12em; text-transform: uppercase;
  font-weight: 700; color: rgba(255,255,255,0.78); margin-bottom: 14px;
  display: inline-flex; align-items: center; gap: 10px;
}
.cat-hero .eyebrow::before { content: ""; width: 22px; height: 1px; background: var(--accent-warm); }
.cat-hero h1 { font-family: var(--serif); font-size: clamp(2.2rem, 4vw, 3.4rem); line-height: 1.1; max-width: 760px; margin-bottom: 18px; }
.cat-hero h1 em { color: rgba(255,255,255,0.88); font-style: italic; }
.cat-hero p { font-size: 1.04rem; line-height: 1.65; color: rgba(255,255,255,0.84); max-width: 680px; }

.hero-metabolic    { background: linear-gradient(135deg, #7a3a0d 0%, #c2640d 60%, #e89a3a 100%); }
.hero-repair       { background: linear-gradient(135deg, #0a3d36 0%, #0f766e 60%, #34a195 100%); }
.hero-inflammation { background: linear-gradient(135deg, #0f3a52 0%, #236b8e 60%, #4c9bbf 100%); }
.hero-growth       { background: linear-gradient(135deg, #5a4112 0%, #a07517 60%, #d4a432 100%); }
.hero-neuro        { background: linear-gradient(135deg, #2d1b4d 0%, #5b3a8a 60%, #8a5fc4 100%); }
.hero-immune       { background: linear-gradient(135deg, #5a1a10 0%, #a8301c 60%, #d65843 100%); }
.hero-melano       { background: linear-gradient(135deg, #5a3211 0%, #9a5b21 60%, #cc8842 100%); }
.hero-endocrine    { background: linear-gradient(135deg, #5a1d3a 0%, #a8336a 60%, #d65a98 100%); }
.hero-longevity    { background: linear-gradient(135deg, #1a2069 0%, #2c3a85 60%, #4f60bf 100%); }
.hero-cartilage    { background: linear-gradient(135deg, #3a4310 0%, #5e6b1f 60%, #8c9b3f 100%); }
.hero-sleep        { background: linear-gradient(135deg, #15163d 0%, #1f2266 60%, #3f478e 100%); }
.hero-oxidative    { background: linear-gradient(135deg, #0a3d3a 0%, #0d6660 60%, #27968d 100%); }

/* ─────────── CONTEXT INTRO BLOCK (top of section page) ─────────── */
.context-intro {
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  padding: 28px 30px; margin-bottom: 36px;
}
.context-intro p { font-size: 0.96rem; line-height: 1.75; color: var(--ink-soft); margin-bottom: 12px; }
.context-intro p strong { color: var(--ink); }
.context-intro p:last-child { margin-bottom: 0; }

/* ─────────── FOOTER ─────────── */
footer.site-footer {
  background: #141210; color: #807a74; padding: 60px 5% 28px;
  border-top: 1px solid #2a2824;
}
.footer-grid {
  max-width: 1240px; margin: 0 auto;
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 40px;
}
.footer-brand .footer-logo { font-family: var(--serif); font-size: 1.4rem; color: white; margin-bottom: 6px; line-height: 1.1; }
.footer-brand .footer-tag { font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent-warm); margin-bottom: 14px; }
.footer-brand p { font-size: 0.82rem; line-height: 1.6; color: #807a74; }
.footer-col h4 { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: #c0bab4; margin-bottom: 14px; }
.footer-col a { display: block; text-decoration: none; color: #807a74; font-size: 0.84rem; margin-bottom: 8px; transition: color .2s; }
.footer-col a:hover { color: #c0bab4; }
.footer-bottom {
  max-width: 1240px; margin: 0 auto; padding-top: 22px;
  border-top: 1px solid #2a2824;
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  font-size: 0.76rem;
}
.footer-disclaimer {
  max-width: 1240px; margin: 18px auto 0;
  font-size: 0.72rem; color: #554e48; line-height: 1.6;
}

/* ─────────── ACCENT CLASSES (12) ─────────── */
.acc-metabolic    { --cat-color: var(--c-metabolic);    --cat-color-light: var(--c-metabolic-light); }
.acc-repair       { --cat-color: var(--c-repair);       --cat-color-light: var(--c-repair-light); }
.acc-inflammation { --cat-color: var(--c-inflammation); --cat-color-light: var(--c-inflammation-light); }
.acc-growth       { --cat-color: var(--c-growth);       --cat-color-light: var(--c-growth-light); }
.acc-neuro        { --cat-color: var(--c-neuro);        --cat-color-light: var(--c-neuro-light); }
.acc-immune       { --cat-color: var(--c-immune);       --cat-color-light: var(--c-immune-light); }
.acc-melano       { --cat-color: var(--c-melano);       --cat-color-light: var(--c-melano-light); }
.acc-endocrine    { --cat-color: var(--c-endocrine);    --cat-color-light: var(--c-endocrine-light); }
.acc-longevity    { --cat-color: var(--c-longevity);    --cat-color-light: var(--c-longevity-light); }
.acc-cartilage    { --cat-color: var(--c-cartilage);    --cat-color-light: var(--c-cartilage-light); }
.acc-sleep        { --cat-color: var(--c-sleep);        --cat-color-light: var(--c-sleep-light); }
.acc-oxidative    { --cat-color: var(--c-oxidative);    --cat-color-light: var(--c-oxidative-light); }

/* ─────────── RESPONSIVE ─────────── */
@media (max-width: 1024px) {
  .page-layout { grid-template-columns: 1fr; }
  .toc { position: relative; top: 0; }
  .hero { grid-template-columns: 1fr; gap: 30px; padding: 50px 5%; }
  .card-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .card-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  nav.site-nav a:not(.nav-logo):not(.nav-cta) { display: none; }
  .card-grid-3, .card-grid-4, .card-grid-2 { grid-template-columns: 1fr; }
  .browse-controls { grid-template-columns: 1fr; }
  .accord-head { padding: 18px 18px; gap: 12px; }
  .accord-num { font-size: 1.3rem; min-width: 28px; }
  .accord-title h3 { font-size: 1.15rem; }
  .accord.is-open .accord-body { grid-template-columns: 1fr; padding: 20px 18px 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .section { padding: 56px 5%; }
}