:root {
  --bg: #0a0e14;
  --bg-2: #0f1520;
  --surface: #131c2b;
  --surface-2: #182234;
  --line: rgba(255,255,255,0.07);
  --muted: #6b7a94;
  --body: #b0bdd4;
  --head: #e8edf5;
  --white: #f4f7fc;

  --teal: #00c9a7;
  --teal-dim: rgba(0,201,167,0.12);
  --gold: #f0a500;
  --gold-dim: rgba(240,165,0,0.10);
  --rose: #e05a7a;
  --rose-dim: rgba(224,90,122,0.10);
  --sky: #5ca8e8;
  --sky-dim: rgba(92,168,232,0.10);
  --violet: #a57cf0;
  --violet-dim: rgba(165,124,240,0.10);
  --lime: #7ecd4e;
  --lime-dim: rgba(126,205,78,0.10);

  --accent: var(--teal);
  --accent-dim: var(--teal-dim);
  --accent-contrast: #031a14;

  --mono: "DM Mono", "SFMono-Regular", Menlo, monospace;
  --serif: "Playfair Display", Georgia, serif;
  --sans: "DM Sans", system-ui, sans-serif;
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: #f7f7f3;
  --bg-2: #eef0ea;
  --surface: #ffffff;
  --surface-2: #f4f5ef;
  --line: rgba(58, 67, 81, 0.14);
  --muted: #6c7684;
  --body: #4a5461;
  --head: #232c38;
  --white: #232c38;

  --teal: #4b8196;
  --teal-dim: rgba(75,129,150,0.14);
  --gold: #a8833b;
  --gold-dim: rgba(185,133,44,0.12);
  --rose: #a96c78;
  --rose-dim: rgba(183,103,116,0.12);
  --sky: #5d8ea3;
  --sky-dim: rgba(93,142,163,0.12);
  --violet: #7b88a0;
  --violet-dim: rgba(123,136,160,0.12);
  --lime: #738d61;
  --lime-dim: rgba(122,151,80,0.12);

  --accent: var(--teal);
  --accent-dim: var(--teal-dim);
  --accent-contrast: #ffffff;
  color-scheme: light;
}

:root[data-theme="dark"] {
  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f7f7f3;
    --bg-2: #eef0ea;
    --surface: #ffffff;
    --surface-2: #f4f5ef;
    --line: rgba(58, 67, 81, 0.14);
    --muted: #6c7684;
    --body: #4a5461;
    --head: #232c38;
    --white: #232c38;

    --teal: #4b8196;
    --teal-dim: rgba(75,129,150,0.14);
    --gold: #a8833b;
    --gold-dim: rgba(185,133,44,0.12);
    --rose: #a96c78;
    --rose-dim: rgba(183,103,116,0.12);
    --sky: #5d8ea3;
    --sky-dim: rgba(93,142,163,0.12);
    --violet: #7b88a0;
    --violet-dim: rgba(123,136,160,0.12);
    --lime: #738d61;
    --lime-dim: rgba(122,151,80,0.12);

    --accent: var(--teal);
    --accent-dim: var(--teal-dim);
    --accent-contrast: #ffffff;
    color-scheme: light;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--body);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

code, pre {
  font-family: var(--mono);
}

.page {
  position: relative;
}

.shell {
  width: min(1180px, 100%);
  margin: 0 auto;
  padding: 0 28px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(10,14,20,.84);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}

:root[data-theme="light"] .topbar {
  background: rgba(245,247,251,.88);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .topbar {
    background: rgba(245,247,251,.88);
  }
}

.topbar-inner {
  width: min(1180px, 100%);
  margin: 0 auto;
  padding: 14px 28px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 10px;
}

.brand {
  font-family: var(--serif);
  color: var(--white);
  font-size: 24px;
  font-weight: 900;
  letter-spacing: -0.03em;
}

.brand span {
  color: var(--accent);
}

.topnav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 14px;
  align-items: center;
  margin-left: auto;
  justify-content: flex-end;
}

.theme-toggle {
  appearance: none;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--white) 4%, var(--surface-2));
  color: var(--muted);
  border-radius: 999px;
  padding: 6px 12px;
  font: inherit;
  font-size: 12px;
  line-height: 1;
  cursor: pointer;
  transition: background .2s ease, color .2s ease, border-color .2s ease, transform .2s ease;
}

.theme-toggle:hover {
  background: color-mix(in srgb, var(--accent) 12%, var(--surface-2));
  border-color: color-mix(in srgb, var(--accent) 28%, transparent);
  color: var(--head);
  transform: translateY(-1px);
}

.search-toggle {
  appearance: none;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--white) 4%, var(--surface-2));
  color: var(--muted);
  border-radius: 999px;
  padding: 6px 10px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font: inherit;
  font-size: 12px;
  line-height: 1;
  cursor: pointer;
  transition: background .2s ease, color .2s ease, border-color .2s ease, transform .2s ease;
}

.search-toggle:hover {
  background: color-mix(in srgb, var(--accent) 12%, var(--surface-2));
  border-color: color-mix(in srgb, var(--accent) 28%, transparent);
  color: var(--head);
  transform: translateY(-1px);
}

.search-toggle kbd {
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 2px 6px;
  background: color-mix(in srgb, var(--white) 5%, var(--surface-2));
  color: var(--head);
  font-family: var(--mono);
  font-size: 10px;
  line-height: 1;
}

body.site-search-open {
  overflow: hidden;
}

.site-search-overlay {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 86px 16px 24px;
  background: rgba(6, 10, 16, 0.72);
  backdrop-filter: blur(8px);
}

.site-search-overlay[hidden] {
  display: none !important;
}

:root[data-theme="light"] .site-search-overlay {
  background: rgba(233, 238, 243, 0.70);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .site-search-overlay {
    background: rgba(233, 238, 243, 0.70);
  }
}

.site-search-dialog {
  width: min(760px, 100%);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 26px 52px rgba(0,0,0,.35);
  overflow: hidden;
}

.site-search-head {
  padding: 10px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 8px;
}

.site-search-input {
  flex: 1;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 14px;
  background: color-mix(in srgb, var(--surface-2) 90%, var(--bg));
  color: var(--head);
  font-family: var(--sans);
  font-size: 15px;
  outline: none;
}

.site-search-input::placeholder {
  color: var(--muted);
}

.site-search-input:focus-visible {
  border-color: color-mix(in srgb, var(--accent) 45%, transparent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 28%, transparent);
}

.site-search-close {
  appearance: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: color-mix(in srgb, var(--white) 4%, var(--surface-2));
  color: var(--muted);
  padding: 10px 12px;
  font: inherit;
  font-size: 12px;
  line-height: 1;
  cursor: pointer;
}

.site-search-close:hover {
  color: var(--head);
  border-color: color-mix(in srgb, var(--accent) 30%, transparent);
  background: color-mix(in srgb, var(--accent) 10%, var(--surface-2));
}

.site-search-help {
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 12px;
  color: var(--muted);
}

.site-search-shortcut {
  font-family: var(--mono);
  color: var(--head);
}

.site-search-results {
  list-style: none;
  margin: 0;
  padding: 8px;
  display: grid;
  gap: 6px;
  max-height: min(62vh, 480px);
  overflow: auto;
}

.site-search-item {
  margin: 0;
}

.site-search-link {
  display: grid;
  gap: 4px;
  border-radius: 12px;
  padding: 10px 12px;
  border: 1px solid transparent;
  background: color-mix(in srgb, var(--white) 2%, var(--surface-2));
  transition: border-color .2s ease, background .2s ease, transform .2s ease;
}

.site-search-link:hover,
.site-search-link.active {
  border-color: color-mix(in srgb, var(--accent) 38%, transparent);
  background: color-mix(in srgb, var(--accent) 12%, var(--surface-2));
  transform: translateY(-1px);
}

.site-search-link:focus-visible {
  outline: none;
  border-color: color-mix(in srgb, var(--accent) 45%, transparent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 28%, transparent);
}

.site-search-title {
  color: var(--head);
  font-size: 15px;
  line-height: 1.3;
  font-weight: 600;
}

.site-search-meta {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
  font-family: var(--mono);
}

.site-search-empty {
  border-radius: 12px;
  padding: 14px;
  text-align: center;
  color: var(--muted);
  background: color-mix(in srgb, var(--white) 2%, var(--surface-2));
  border: 1px dashed var(--line);
  font-size: 14px;
}

.search-fab {
  position: fixed;
  right: 14px;
  bottom: 16px;
  z-index: 45;
  display: none;
  appearance: none;
  border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
  background: color-mix(in srgb, var(--accent) 18%, var(--surface-2));
  color: var(--head);
  border-radius: 999px;
  padding: 10px 14px;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  box-shadow: 0 16px 26px rgba(0,0,0,.28);
  cursor: pointer;
}

.search-fab:hover {
  transform: translateY(-1px);
}

.hero {
  padding: 84px 0 40px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--accent-dim);
  border: 1px solid color-mix(in srgb, var(--accent) 28%, transparent);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.hero-grid {
  margin-top: 24px;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, 430px);
  gap: 28px;
  align-items: start;
}

.hero h1 {
  margin: 0 0 18px;
  font-family: var(--serif);
  font-size: clamp(44px, 6vw, 84px);
  line-height: 1.05;
  color: var(--white);
  letter-spacing: -.05em;
  user-select: none;
  -webkit-user-select: none;
}

.hero h1 .accent {
  color: var(--accent);
}

.hero p {
  max-width: 700px;
  margin: 0;
  color: var(--body);
  font-size: 19px;
}

.hero-card,
.panel,
.code-card,
.tile {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: 0 22px 46px rgba(0,0,0,.24);
}

.hero-card {
  padding: 22px 24px;
}

.hero-card h2 {
  margin: 0 0 10px;
  color: var(--head);
  font-size: 18px;
  letter-spacing: -.02em;
}

.hero-card p {
  font-size: 15px;
  color: var(--muted);
}

.section {
  padding: 26px 0 72px;
}

.section-head {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 20px;
  align-items: end;
  margin-bottom: 26px;
}

.section-head h2 {
  margin: 0;
  color: var(--head);
  font-family: var(--serif);
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.02;
  letter-spacing: -.04em;
}

.section-head p {
  margin: 0;
  max-width: 520px;
  color: var(--muted);
  font-size: 16px;
}

.grid {
  display: grid;
  gap: 20px;
}

.grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.panel {
  padding: 24px;
}

.panel h3 {
  margin: 0 0 10px;
  color: var(--head);
  font-size: 21px;
  letter-spacing: -.03em;
}

.panel h3.model-name {
  display: inline-flex;
  align-items: center;
  margin-bottom: 12px;
  padding: 7px 12px;
  border-radius: 12px;
  background: color-mix(in srgb, var(--accent) 12%, var(--surface-2));
  border: 1px solid color-mix(in srgb, var(--accent) 28%, transparent);
  color: var(--white);
  font-family: var(--mono);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -.02em;
}

.panel p {
  margin: 0 0 12px;
  color: var(--body);
}

.sig {
  margin: 10px 0 12px;
  padding: 10px 12px;
  border-radius: 14px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  color: var(--white);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.7;
  overflow: auto;
}

.arglist {
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--body);
  font-size: 15px;
}

.arglist li + li {
  margin-top: 5px;
}

.panel ul {
  margin: 0;
  padding-left: 18px;
  color: var(--body);
}

.panel li + li {
  margin-top: 6px;
}

.family-list {
  display: grid;
  gap: 10px;
}

.tile {
  padding: 18px 20px;
  transition: transform .2s, border-color .2s;
}

.tile:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
}

.tile h3 {
  margin: 0 0 8px;
  color: var(--head);
  font-size: 20px;
}

.tile.tile-teal h3 { color: var(--teal); }
.tile.tile-sky h3 { color: var(--sky); }
.tile.tile-rose h3 { color: var(--rose); }
.tile.tile-gold h3 { color: var(--gold); }
.tile.tile-violet h3 { color: var(--violet); }
.tile.tile-lime h3 { color: var(--lime); }

.tile.tile-teal:hover { border-color: color-mix(in srgb, var(--teal) 45%, var(--line)); }
.tile.tile-sky:hover { border-color: color-mix(in srgb, var(--sky) 45%, var(--line)); }
.tile.tile-rose:hover { border-color: color-mix(in srgb, var(--rose) 45%, var(--line)); }
.tile.tile-gold:hover { border-color: color-mix(in srgb, var(--gold) 45%, var(--line)); }
.tile.tile-violet:hover { border-color: color-mix(in srgb, var(--violet) 45%, var(--line)); }
.tile.tile-lime:hover { border-color: color-mix(in srgb, var(--lime) 45%, var(--line)); }

.tile p {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 15px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  display: inline-flex;
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--accent) 24%, transparent);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--accent);
  font-family: var(--mono);
  font-size: 12px;
}

.code-card {
  padding: 20px 22px;
  overflow: auto;
}

.code-card pre {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--body);
}

.code-card .kw { color: var(--violet); }
.code-card .fn { color: var(--teal); }
.code-card .arg { color: var(--gold); }
.code-card .str { color: var(--rose); }
.code-card .num { color: var(--sky); }
.code-card .cm { color: var(--muted); font-style: italic; }

.figure-grid {
  display: grid;
  gap: 20px;
}

.figure-grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.figure-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: 0 22px 46px rgba(0,0,0,.24);
  overflow: hidden;
}

.figure-card.wide {
  grid-column: span 2;
}

.figure-stage {
  background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 8%, var(--surface-2)), var(--surface));
  border-bottom: 1px solid var(--line);
  padding: 14px;
}

.figure-stage svg {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 16px;
}

.figure-stage img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 16px;
}

.figure-copy {
  padding: 18px 20px 20px;
}

.figure-copy h3 {
  margin: 0 0 8px;
  color: var(--head);
  font-size: 19px;
  letter-spacing: -.03em;
}

.figure-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.65;
}

.figure-code {
  margin-top: 12px;
  padding: 9px 11px;
  border-radius: 14px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  color: var(--white);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.65;
  overflow: auto;
}

.bayes-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: 0 22px 46px rgba(0,0,0,.24);
  padding: 28px;
}

.bayes-eyebrow {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.bayes-formula {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 12px;
}

.bayes-posterior,
.bayes-equals,
.bayes-factor {
  color: var(--white);
  font-family: var(--serif);
  font-size: clamp(24px, 3vw, 40px);
  line-height: 1;
}

.bayes-factor {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-wrap: nowrap;
}

.bayes-term {
  min-width: 82px;
  min-height: 82px;
  padding: 10px;
  border-radius: 20px;
  background: color-mix(in srgb, var(--white) 3%, var(--surface-2));
  border: 1px solid color-mix(in srgb, var(--white) 7%, var(--line));
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.bayes-term svg {
  width: 64px;
  height: 64px;
  display: block;
}

.bayes-main {
  margin-bottom: 18px;
}

.bayes-product {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 12px;
}

.bayes-note {
  margin-top: 16px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.footer {
  border-top: 1px solid var(--line);
  padding: 28px 0 40px;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 980px) {
  .hero-grid,
  .grid.two,
  .grid.three,
  .section-head,
  .figure-grid.two {
    grid-template-columns: 1fr;
  }

  .figure-card.wide {
    grid-column: span 1;
  }
}

@media (max-width: 720px) {
  .topnav {
    display: none;
  }

  .hero {
    padding-top: 64px;
  }

  .site-search-overlay {
    padding-top: 72px;
  }

  .site-search-help {
    align-items: center;
  }

  .search-fab {
    display: inline-flex;
    align-items: center;
  }
}

/* ═══════════════════════════════════════════════════════════════
   NEW GLOBAL COMPONENTS (site.js-driven)
═══════════════════════════════════════════════════════════════ */

/* ── Language toggle ────────────────────────────────────────── */
.lang-toggle {
  appearance: none;
  border: 1px solid color-mix(in srgb, var(--line) 75%, transparent);
  background: color-mix(in srgb, var(--surface) 86%, var(--surface-2));
  border-radius: 999px;
  padding: 0;
  font: inherit;
  font-size: 6px;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  transition: background .2s, border-color .2s, transform .18s, box-shadow .2s;
  white-space: nowrap;
  flex-shrink: 0;
  min-width: 44px;
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--white) 3%, transparent);
}
.lang-toggle:hover {
  border-color: color-mix(in srgb, var(--accent) 40%, transparent);
  transform: translateY(-0.5px);
  box-shadow: 0 6px 18px color-mix(in srgb, var(--accent) 18%, transparent);
}
.lang-toggle:focus-visible {
  outline: none;
  border-color: color-mix(in srgb, var(--accent) 55%, transparent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 24%, transparent);
}
.lang-switch {
  --lang-r-col: 36%;
  --lang-py-col: 64%;
  position: relative;
  display: grid;
  grid-template-columns: var(--lang-r-col) var(--lang-py-col);
  align-items: center;
  min-width: 41px;
  height: 12px;
}
.lang-switch-thumb {
  position: absolute;
  top: 0;
  left: 0;
  width: var(--lang-r-col);
  height: 100%;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 15%, var(--surface-2));
  border: 1px solid color-mix(in srgb, var(--accent) 36%, transparent);
  box-shadow: 0 1px 3px rgba(0,0,0,.18);
  transition: left .22s ease, width .22s ease, background .22s ease, border-color .22s ease;
}
.lang-switch-option {
  position: relative;
  z-index: 1;
  text-align: center;
  font-size: 6px;
  letter-spacing: 0;
  color: var(--muted);
  transition: color .18s ease;
}
.lang-switch-option-r {
  padding-left: 0;
}
.lang-switch-option-py {
  padding-right: 0;
}
.lang-toggle[data-lang-active="r"] .lang-switch-thumb {
  left: 0;
  width: var(--lang-r-col);
}
.lang-toggle[data-lang-active="python"] .lang-switch-thumb {
  left: var(--lang-r-col);
  width: var(--lang-py-col);
}
.lang-toggle[data-lang-active="r"] .lang-switch-option-r {
  color: color-mix(in srgb, var(--gold) 85%, var(--head));
}
.lang-toggle[data-lang-active="python"] .lang-switch-option-py {
  color: color-mix(in srgb, var(--sky) 90%, var(--head));
}
:root[data-theme="light"] .lang-toggle {
  background: color-mix(in srgb, #ebf1f3 76%, #f8f9f8);
  border-color: rgba(94, 121, 132, 0.36);
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .lang-toggle {
    background: color-mix(in srgb, #ebf1f3 76%, #f8f9f8);
    border-color: rgba(94, 121, 132, 0.36);
  }
}

/* ── Page-local Continuous Models scope switch ──────────────── */
.cts-scope-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  align-items: center;
}

.cts-scope-caption {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}

.cts-scope-toggle {
  appearance: none;
  border: 1px solid color-mix(in srgb, var(--line) 75%, transparent);
  background: color-mix(in srgb, var(--surface) 86%, var(--surface-2));
  border-radius: 999px;
  padding: 2px;
  font: inherit;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  min-width: 162px;
  transition: border-color .18s, box-shadow .2s, transform .18s;
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--white) 3%, transparent);
}

.cts-scope-toggle:hover {
  border-color: color-mix(in srgb, var(--accent) 42%, transparent);
  transform: translateY(-1px);
  box-shadow: 0 7px 18px color-mix(in srgb, var(--accent) 16%, transparent);
}

.cts-scope-toggle:focus-visible {
  outline: none;
  border-color: color-mix(in srgb, var(--accent) 55%, transparent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 24%, transparent);
}

.cts-scope-switch {
  --cts-uni-col: 44%;
  --cts-multi-col: 56%;
  position: relative;
  display: grid;
  grid-template-columns: var(--cts-uni-col) var(--cts-multi-col);
  align-items: center;
  min-width: 154px;
  height: 26px;
}

.cts-scope-thumb {
  position: absolute;
  top: 0;
  left: 0;
  width: var(--cts-uni-col);
  height: 100%;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 15%, var(--surface-2));
  border: 1px solid color-mix(in srgb, var(--accent) 36%, transparent);
  box-shadow: 0 1px 4px rgba(0,0,0,.18);
  transition: left .22s ease, width .22s ease, background .22s ease, border-color .22s ease;
}

.cts-scope-option {
  position: relative;
  z-index: 1;
  text-align: center;
  font-size: 11px;
  font-weight: 700;
  color: var(--muted);
  transition: color .18s ease;
}

.cts-scope-toggle[data-cts-scope-active="univariate"] .cts-scope-thumb {
  left: 0;
  width: var(--cts-uni-col);
}

.cts-scope-toggle[data-cts-scope-active="multivariate"] .cts-scope-thumb {
  left: var(--cts-uni-col);
  width: var(--cts-multi-col);
}

.cts-scope-toggle[data-cts-scope-active="univariate"] .cts-scope-option-uni {
  color: color-mix(in srgb, var(--gold) 85%, var(--head));
}

.cts-scope-toggle[data-cts-scope-active="multivariate"] .cts-scope-option-multi {
  color: color-mix(in srgb, var(--sky) 90%, var(--head));
}

:root[data-theme="light"] .cts-scope-toggle {
  background: color-mix(in srgb, #ebf1f3 76%, #f8f9f8);
  border-color: rgba(94, 121, 132, 0.36);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .cts-scope-toggle {
    background: color-mix(in srgb, #ebf1f3 76%, #f8f9f8);
    border-color: rgba(94, 121, 132, 0.36);
  }
}

@media (max-width: 720px) {
  .cts-scope-caption {
    width: 100%;
  }
}

/* Active topnav link */
.topnav a.active {
  color: var(--head);
  position: relative;
}
.topnav a.active::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0; right: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
}

/* ── Sidebar ────────────────────────────────────────────────── */
.site-sidebar {
  position: fixed;
  top: 68px;
  left: max(4px, calc(50vw - 590px - 236px));
  width: 220px;
  height: calc(100vh - 80px);
  overflow-y: auto;
  padding: 18px 10px 26px;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
  z-index: 10;
  display: none;
  border: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
  border-radius: 18px;
  background: var(--bg);
  box-shadow: none;
  backdrop-filter: none;
}

@media (min-width: 1600px) {
  .site-sidebar { display: flex; flex-direction: column; }
}

:root[data-theme="light"] .site-sidebar {
  background: var(--bg);
  border-color: rgba(110, 128, 132, .24);
  box-shadow: none;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .site-sidebar {
    background: var(--bg);
    border-color: rgba(110, 128, 132, .24);
    box-shadow: none;
  }
}

.site-sidebar::-webkit-scrollbar { width: 3px; }
.site-sidebar::-webkit-scrollbar-thumb {
  background: var(--line); border-radius: 3px;
}

/* "THEORY" section label */
.sb-heading {
  padding: 2px 14px 14px;
  font-size: 10px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 700;
  font-family: var(--mono);
  opacity: .7;
}

/* Family-level color vars (inherited by children) */
.sb-family[data-family="data-handling"] { --sb-color: var(--teal);   --sb-dim: var(--teal-dim);   }
.sb-family[data-family="tree-priors"]   { --sb-color: var(--gold);   --sb-dim: var(--gold-dim);   }
.sb-family[data-family="discrete"]      { --sb-color: var(--rose);   --sb-dim: var(--rose-dim);   }
.sb-family[data-family="cts-models"]    { --sb-color: var(--sky);    --sb-dim: var(--sky-dim);    }
.sb-family[data-family="clock"]         { --sb-color: var(--violet); --sb-dim: var(--violet-dim); }
.sb-family[data-family="summaries"]     { --sb-color: var(--lime);   --sb-dim: var(--lime-dim);   }

/* Family section block */
.sb-family {
  position: relative;
  margin: 0 4px 2px;
  border-radius: 10px;
  overflow: hidden;
}

/* Family heading button */
.sb-family-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px 8px 10px;
  cursor: pointer;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color .15s, background .15s;
  user-select: none;
  border-radius: 8px;
  position: relative;
}
.sb-family-head::before {
  content: '';
  display: block;
  width: 3px;
  height: 14px;
  border-radius: 2px;
  background: var(--sb-color, var(--line));
  opacity: 0;
  transition: opacity .2s;
  flex-shrink: 0;
}
.sb-family-head:hover {
  color: var(--head);
  background: color-mix(in srgb, var(--sb-dim, var(--surface)) 50%, var(--surface));
}
.sb-open .sb-family-head {
  color: var(--head);
  background: color-mix(in srgb, var(--sb-dim, var(--surface)) 36%, var(--surface));
}
.sb-open .sb-family-head::before {
  opacity: 1;
}

/* Hide legacy dot — color accent is now the ::before bar */
.sb-family-dot { display: none; }

/* Chevron */
.sb-family-arrow {
  margin-left: auto;
  font-size: 9px;
  color: var(--muted);
  transition: transform .22s, color .15s;
  flex-shrink: 0;
}
.sb-open .sb-family-arrow {
  transform: rotate(90deg);
  color: var(--sb-color, var(--accent));
}

/* Children container — indented under the family head */
.sb-children {
  display: none;
  padding: 4px 0 8px 0;
  margin-left: 10px;
  border-left: 1.5px solid color-mix(in srgb, var(--sb-color, var(--line)) 35%, transparent);
}
.sb-open > .sb-children { display: block; }

/* Sub-category label (e.g. "Coalescent", "Speciation") */
.sb-sub {
  display: block;
  padding: 8px 12px 3px;
  font-size: 10px;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: .12em;
  text-transform: uppercase;
  font-family: var(--mono);
  opacity: .7;
}
.sb-children > .sb-sub:first-child { padding-top: 4px; }

/* Link items */
.sb-link {
  display: block;
  padding: 5px 12px;
  font-size: 13px;
  line-height: 1.4;
  color: var(--body);
  text-decoration: none;
  border-radius: 0;
  transition: color .12s, background .12s;
}
.sb-link:hover {
  color: var(--sb-color, var(--head));
  background: var(--sb-dim, var(--surface));
}
.sb-link.sb-current {
  color: var(--sb-color, var(--accent));
  font-weight: 600;
  background: var(--sb-dim, var(--surface));
}

/* ── Daisy hub ──────────────────────────────────────────────── */
.daisy-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  padding: 40px 0 10px;
  position: relative;
}

.daisy-svg {
  width: min(600px, 100%);
  height: auto;
  display: block;
  overflow: visible;
}

.daisy-petal-group {
  cursor: pointer;
  transition: filter .22s;
}
.daisy-petal-group:hover { filter: brightness(1.18) drop-shadow(0 0 12px currentColor); }
.daisy-petal-group:hover .daisy-petal-ellipse { fill-opacity: 0.38; }

.daisy-petal-ellipse {
  fill-opacity: 0.18;
  stroke-width: 1.5;
  transition: fill-opacity .22s;
}

.daisy-petal-text {
  font-family: "DM Sans", system-ui, sans-serif;
  font-size: 13px;
  font-weight: 700;
  fill: var(--head);
  pointer-events: none;
}

.daisy-info-box {
  text-align: center;
  min-height: 48px;
  margin-top: 12px;
  transition: opacity .2s;
}
.daisy-info-name {
  font-family: "Playfair Display", Georgia, serif;
  font-size: 20px;
  font-weight: 700;
  color: var(--head);
}
.daisy-info-desc {
  font-size: 14px;
  color: var(--muted);
  margin-top: 4px;
}

/* ── Theory content (definitions, math) ────────────────────── */
.theory-body {
  max-width: 820px;
  margin: 0 auto;
}

.defn-block, .prop-block, .thm-block, .corollary-block {
  border-left: 3px solid var(--accent);
  background: color-mix(in srgb, var(--accent) 6%, var(--surface));
  border-radius: 0 16px 16px 0;
  padding: 16px 20px;
  margin: 22px 0;
}
.prop-block  { border-color: var(--gold);   background: color-mix(in srgb, var(--gold)   6%, var(--surface)); }
.thm-block   { border-color: var(--violet); background: color-mix(in srgb, var(--violet) 6%, var(--surface)); }
.corollary-block { border-color: var(--sky); background: color-mix(in srgb, var(--sky) 6%, var(--surface)); }

.defn-label, .prop-label, .thm-label {
  font-family: "DM Mono", monospace;
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
  font-weight: 700;
}
.prop-block .defn-label  { color: var(--gold);   }
.thm-block  .defn-label  { color: var(--violet); }
.corollary-block .defn-label { color: var(--sky); }

.defn-block p, .prop-block p, .thm-block p, .corollary-block p {
  margin: 0;
  color: var(--body);
  line-height: 1.75;
}

.math-display {
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px 20px;
  margin: 18px 0;
  overflow-x: auto;
  text-align: center;
}

/* ── Interconnection tags ───────────────────────────────────── */
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0;
  align-items: center;
}
.tag-label {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .08em;
  font-weight: 600;
}
.tag-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 11px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  text-decoration: none;
  transition: background .15s, border-color .15s;
}
.tag-theory {
  border: 1px solid color-mix(in srgb, var(--violet) 35%, transparent);
  background: color-mix(in srgb, var(--violet) 10%, transparent);
  color: var(--violet);
}
.tag-code {
  border: 1px solid color-mix(in srgb, var(--teal) 35%, transparent);
  background: color-mix(in srgb, var(--teal) 10%, transparent);
  color: var(--teal);
}
.tag-workshop {
  border: 1px solid color-mix(in srgb, var(--gold) 35%, transparent);
  background: color-mix(in srgb, var(--gold) 10%, transparent);
  color: var(--gold);
}
.tag-link:hover { filter: brightness(1.15); }

/* ── Interactive app wrapper ────────────────────────────────── */
.iapp-wrap {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 24px;
  overflow: hidden;
  margin: 32px 0;
}
.iapp-header {
  padding: 14px 20px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 10px;
}
.iapp-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}
.iapp-title {
  font-weight: 700;
  font-size: 15px;
  color: var(--head);
}
.iapp-body {
  padding: 20px;
}
.iapp-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 18px;
  align-items: center;
}
.iapp-label {
  font-size: 13px;
  color: var(--muted);
  font-weight: 600;
}
.iapp-slider {
  accent-color: var(--accent);
  width: 140px;
}
.iapp-select {
  background: var(--surface-2);
  border: 1px solid var(--line);
  color: var(--head);
  border-radius: 8px;
  padding: 5px 10px;
  font: inherit;
  font-size: 13px;
}
.iapp-canvas-wrap {
  background: var(--bg-2);
  border-radius: 16px;
  overflow: hidden;
  position: relative;
}
.iapp-canvas {
  display: block;
  width: 100%;
}
.iapp-btn {
  appearance: none;
  border: 1px solid var(--accent, var(--teal));
  background: color-mix(in srgb, var(--accent, var(--teal)) 14%, var(--surface-2));
  color: var(--accent, var(--teal));
  border-radius: 10px;
  padding: 8px 16px;
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s;
}
.iapp-btn:hover {
  background: color-mix(in srgb, var(--accent, var(--teal)) 24%, var(--surface-2));
}

/* ── Family overview page hero ──────────────────────────────── */
.family-hero {
  padding: 72px 0 32px;
}
.family-hero-inner {
  max-width: 820px;
  margin: 0 auto;
}
.family-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.family-badge-teal   { background: var(--teal-dim);   color: var(--teal);   border: 1px solid color-mix(in srgb, var(--teal)   30%, transparent); }
.family-badge-gold   { background: var(--gold-dim);   color: var(--gold);   border: 1px solid color-mix(in srgb, var(--gold)   30%, transparent); }
.family-badge-rose   { background: var(--rose-dim);   color: var(--rose);   border: 1px solid color-mix(in srgb, var(--rose)   30%, transparent); }
.family-badge-sky    { background: var(--sky-dim);    color: var(--sky);    border: 1px solid color-mix(in srgb, var(--sky)    30%, transparent); }
.family-badge-violet { background: var(--violet-dim); color: var(--violet); border: 1px solid color-mix(in srgb, var(--violet) 30%, transparent); }
.family-badge-lime   { background: var(--lime-dim);   color: var(--lime);   border: 1px solid color-mix(in srgb, var(--lime)   30%, transparent); }

/* ── Sub-family cards ───────────────────────────────────────── */
.subfam-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
  margin: 24px 0;
}
.subfam-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 20px 22px;
  text-decoration: none;
  display: block;
  transition: transform .2s, border-color .2s, box-shadow .2s;
}
.subfam-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 38px rgba(0,0,0,.22);
}
.subfam-card-label {
  font-size: 11px;
  font-family: "DM Mono", monospace;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--muted);
  margin-bottom: 8px;
}
.subfam-card h3 {
  margin: 0 0 8px;
  font-size: 18px;
  color: var(--head);
  letter-spacing: -.02em;
}
.subfam-card p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
}

/* ── Workshop cards ─────────────────────────────────────────── */
.workshop-grid {
  display: grid;
  gap: 18px;
}
.workshop-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 20px 24px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 16px;
  text-decoration: none;
  transition: transform .18s, border-color .18s;
}
.workshop-card:hover {
  transform: translateX(4px);
  border-color: color-mix(in srgb, var(--violet) 40%, var(--line));
}
.workshop-card h3 { margin: 0 0 6px; color: var(--head); font-size: 17px; }
.workshop-card p  { margin: 0; color: var(--muted); font-size: 14px; }
.workshop-arrow   { color: var(--muted); font-size: 20px; }

/* ── Blog ───────────────────────────────────────────────────── */
.blog-grid {
  display: grid;
  gap: 20px;
}
.blog-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 22px 26px;
  text-decoration: none;
  display: block;
  transition: transform .18s, border-color .18s;
}
.blog-card:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--line));
}
.blog-meta   { font-size: 12px; color: var(--muted); margin-bottom: 8px; font-family: "DM Mono", monospace; }
.blog-card h3 { margin: 0 0 8px; color: var(--head); font-size: 20px; letter-spacing: -.03em; }
.blog-card p  { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.65; }

/* ── Related section (interconnection) ─────────────────────── */
.related-section {
  border-top: 1px solid var(--line);
  padding: 28px 0 48px;
  margin-top: 40px;
}
.related-section h4 {
  margin: 0 0 14px;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--muted);
  font-weight: 600;
}
.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.related-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--body);
  font-size: 13px;
  text-decoration: none;
  transition: border-color .15s, background .15s, transform .15s;
}
.related-link:hover {
  border-color: color-mix(in srgb, var(--accent) 40%, transparent);
  background: color-mix(in srgb, var(--accent) 8%, var(--surface));
  color: var(--head);
  transform: translateY(-1px);
}
.related-icon { opacity: .7; font-size: 15px; }

/* ── Sidebar mobile toggle button ───────────────────────────── */
.sidebar-toggle-btn {
  display: none;
  appearance: none;
  border: 1px solid var(--line);
  background: var(--surface-2);
  color: var(--muted);
  border-radius: 10px;
  padding: 7px 12px;
  font: inherit;
  font-size: 13px;
  cursor: pointer;
  margin: 12px 0 0 28px;
}
@media (max-width: 1579px) {
  .sidebar-toggle-btn { display: inline-flex; align-items: center; gap: 6px; }
}
.site-sidebar.sb-mobile-open {
  display: block;
  background: var(--bg);
  border: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
  z-index: 50;
}

/* ── Topnav on smaller screens ──────────────────────────────── */
@media (max-width: 860px) {
  .lang-toggle { display: none; }
}
@media (max-width: 720px) {
  .lang-toggle { display: none; }
}

/* ── Back-marker pill ───────────────────────────────────────── */
.bx-back-btn {
  position: fixed;
  bottom: 28px;
  left: 28px;
  display: flex;
  align-items: stretch;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: 0 8px 32px rgba(0,0,0,.22), 0 1px 4px rgba(0,0,0,.10);
  z-index: 200;
  font-size: 13px;
  font-family: var(--sans);
  max-width: 310px;
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .26s cubic-bezier(.22,1,.36,1),
              transform .26s cubic-bezier(.22,1,.36,1);
  pointer-events: none;
  overflow: hidden;
}
.bx-back-btn.bx-back-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
/* Dismiss slide-out */
.bx-back-btn:not(.bx-back-visible) {
  transition: opacity .22s ease, transform .22s ease;
}

/* ← arrow button */
.bx-back-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 40px;
  background: none;
  border: none;
  border-right: 1px solid var(--line);
  cursor: pointer;
  color: var(--accent);
  font-size: 18px;
  padding: 0;
  transition: background .14s;
}
.bx-back-arrow:hover { background: var(--accent-dim); }

/* Text label — clickable */
.bx-back-label {
  flex: 1;
  padding: 9px 10px;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.3;
  color: var(--body);
  transition: color .12s;
  min-width: 0;
}
.bx-back-label:hover { color: var(--head); }
.bx-back-label em {
  font-style: normal;
  color: var(--head);
  font-weight: 500;
}

/* × dismiss */
.bx-back-close {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 34px;
  background: none;
  border: none;
  border-left: 1px solid var(--line);
  cursor: pointer;
  color: var(--muted);
  font-size: 17px;
  padding: 0;
  transition: background .14s, color .14s;
}
.bx-back-close:hover { background: var(--surface-2); color: var(--head); }