/* Reference-page family: long-form product, policy, methodology, and glossary pages. */
.site-main--reference .page-intro {
  max-width: var(--tdb-width-reading);
}

.site-main--reference .content-section > :is(p, ul, ol),
.site-main--reference .glossary-section dl {
  max-width: var(--tdb-width-reading);
}

.site-main--reference .content-section > p:not(.helper-text, .info-box) {
  margin-top: 0.38rem;
  margin-bottom: 0.46rem;
}

.site-main--reference .content-section > h3 {
  max-width: var(--tdb-width-reading);
  margin: 0.85rem 0 0.18rem;
}

.about-tour-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 0.65rem;
  margin: 0.65rem 0 0.3rem;
}

.about-tour-card {
  padding: 0.72rem;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent-yellow-muted);
  border-radius: var(--tdb-radius-panel);
  background: var(--surface-subtle);
}

.about-tour-card h3 {
  margin: 0 0 0.5rem;
}

.about-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.42rem;
}

.about-stat {
  padding: 0.52rem 0.6rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--tdb-radius-control);
  background: var(--surface);
}

.about-stat-value {
  color: var(--text-strong);
  font-size: 1.12rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}

.about-stat-label {
  margin-top: 0.14rem;
  color: var(--text-muted);
  font-size: 0.74rem;
}

.about-source-flow {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 0.5rem;
  margin: 0.6rem 0 0.8rem;
}

.about-source-flow div {
  padding: 0.62rem;
  border: 1px solid var(--border);
  border-radius: var(--tdb-radius-panel);
  background: var(--surface-subtle);
  font-size: 0.84rem;
  line-height: 1.42;
}

.about-source-flow strong {
  display: block;
  margin-bottom: 0.15rem;
  color: var(--text-strong);
}

.glossary-sidebar {
  display: none;
}

.glossary-sidebar-nav {
  display: flex;
  flex-direction: column;
  font-size: 12px;
}

.glossary-sidebar-nav a {
  display: block;
  padding: 0.35rem 0.55rem;
  border-left: 2px solid transparent;
  color: var(--text-muted);
  line-height: 1.35;
  text-decoration: none;
  transition: color 100ms ease;
}

.glossary-sidebar-nav a:hover {
  color: var(--text);
}

.glossary-sidebar-nav a.active {
  border-left-color: var(--accent-yellow-muted);
  color: var(--text-strong);
  font-weight: 650;
}

.glossary-mobile-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.75rem;
  margin-bottom: 0.75rem;
  padding: 0.38rem 0 0.5rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.82rem;
}

.glossary-mobile-nav a {
  color: var(--text-muted);
  text-decoration: none;
}

.glossary-mobile-nav a:hover {
  color: var(--link);
  text-decoration: underline;
}

.glossary-mobile-nav a + a::before {
  display: inline-block;
  margin-right: 0.75rem;
  color: var(--border-strong);
  content: "\00b7";
}

.glossary-section h3 {
  margin-top: 1.1rem;
}

.glossary-section dl {
  margin: 0;
}

.glossary-section dt {
  margin-top: 0.68rem;
  color: var(--text-strong);
  font-size: 0.88rem;
  font-weight: 700;
}

.glossary-section dt:first-of-type {
  margin-top: 0;
}

.glossary-section dd {
  margin: 0.14rem 0 0;
  padding-bottom: 0.66rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.86rem;
  line-height: 1.5;
}

.glossary-section dd:last-of-type {
  padding-bottom: 0;
  border-bottom: 0;
}

.glossary-section dd code {
  padding: 0.08rem 0.3rem;
  border-radius: var(--tdb-radius-control);
  background: var(--surface-subtle);
  font-size: 0.85em;
}

@media (min-width: 1560px) {
  .glossary-sidebar {
    position: fixed;
    top: 50%;
    left: calc((100vw - var(--tdb-width-data)) / 2 - 164px);
    z-index: 10;
    display: block;
    width: 148px;
    transform: translateY(-50%);
  }

  .glossary-mobile-nav {
    display: none;
  }
}

@media (max-width: 520px) {
  .about-stats-grid {
    grid-template-columns: 1fr;
  }
}