.page-topics-index .idx-top {
  background: var(--color-surface);
}

.page-topics-index .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-bottom: var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-topics-index .crumbs a {
  color: var(--color-ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 160ms ease, border-color 160ms ease;
}

.page-topics-index .crumbs a:hover,
.page-topics-index .crumbs a:focus-visible {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.page-topics-index .idx-top-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  align-items: end;
}

.page-topics-index .idx-kicker {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.page-topics-index h1 {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-topics-index .idx-lede {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-topics-index .idx-hero-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-contrast-surface);
}

.page-topics-index .idx-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-topics-index .idx-hero-figure .figure-cap {
  color: var(--color-contrast-ink);
}

.page-topics-index .idx-band {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--color-contrast-line);
  border: 1px solid var(--color-contrast-line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-topics-index .idx-band-item {
  display: flex;
  align-items: baseline;
  gap: 4px;
  padding: var(--space-3) var(--space-3);
  background: var(--color-contrast-surface);
}

.page-topics-index .idx-band-label {
  flex: 1 1 auto;
  font-size: var(--text-xs);
  color: var(--color-contrast-ink);
  opacity: 0.72;
  align-self: center;
}

.page-topics-index .idx-band-num {
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  color: var(--color-contrast-accent);
}

.page-topics-index .idx-band-unit {
  font-size: var(--text-xs);
  color: var(--color-contrast-ink);
  opacity: 0.72;
}

.page-topics-index .idx-groups {
  background: var(--color-surface);
}

.page-topics-index .idx-table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-md);
}

.page-topics-index .idx-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: var(--text-sm);
  line-height: 1.55;
}

.page-topics-index .idx-table-cap {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.page-topics-index .idx-table th {
  text-align: left;
  padding: 10px var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--weight-heading);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
  border-bottom: 1px solid var(--color-line);
  white-space: nowrap;
}

.page-topics-index .idx-table td {
  padding: var(--space-2);
  border-bottom: 1px solid var(--color-line);
  color: var(--color-ink);
  vertical-align: top;
}

.page-topics-index .idx-table tbody tr:nth-child(even) {
  background: var(--color-surface-alt);
}

.page-topics-index .idx-table tbody tr:hover {
  background: var(--color-primary-soft);
}

.page-topics-index .idx-col-idx {
  width: 46px;
}

.page-topics-index .idx-col-hit {
  width: 66px;
  text-align: right;
}

.page-topics-index .idx-idx {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-topics-index .idx-group-name {
  font-weight: var(--weight-heading);
  white-space: nowrap;
}

.page-topics-index .idx-group-name a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--color-primary) 40%, transparent);
}

.page-topics-index .idx-group-name a:hover,
.page-topics-index .idx-group-name a:focus-visible {
  border-bottom-color: var(--color-primary);
}

.page-topics-index .idx-group-items {
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
}

.page-topics-index .idx-hit {
  text-align: right;
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-topics-index .idx-table tfoot td {
  border-bottom: 0;
  border-top: 1px solid var(--color-line);
  background: var(--color-surface-alt);
  font-weight: var(--weight-heading);
}

.page-topics-index .idx-foot-label {
  text-align: right;
  color: var(--color-ink-soft);
}

.page-topics-index .idx-figure-mid {
  margin: 0 0 var(--space-4);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
}

.page-topics-index .idx-figure-mid img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-topics-index .idx-cross-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-surface);
}

.page-topics-index .idx-cross-col {
  padding: var(--space-3);
}

.page-topics-index .idx-cross-col + .idx-cross-col {
  border-top: 1px solid var(--color-line);
}

.page-topics-index .idx-cross-h {
  margin: 0 0 6px;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-topics-index .idx-cross-note {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-topics-index .idx-bar-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-topics-index .idx-bar {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-2);
  padding: 6px 0;
  border-bottom: 1px solid var(--color-line);
}

.page-topics-index .idx-bar:last-child {
  border-bottom: 0;
}

.page-topics-index .idx-bar > .state-tag,
.page-topics-index .idx-bar > .idx-bar-name {
  display: inline-flex;
  align-items: center;
  min-width: 78px;
  font-size: var(--text-xs);
  color: var(--color-ink-soft);
}

.page-topics-index .idx-bar-track {
  display: block;
  height: 6px;
  border-radius: var(--radius-pill);
  background: var(--color-surface-deep);
  overflow: hidden;
}

.page-topics-index .idx-bar-fill {
  display: block;
  height: 100%;
  border-radius: var(--radius-pill);
  background: var(--color-primary);
  transition: width 240ms ease;
}

.page-topics-index .idx-bar-fill.is-alt {
  background: var(--color-primary);
  opacity: 0.7;
}

.page-topics-index .idx-bar-fill.is-deep {
  background: var(--color-accent);
  opacity: 0.85;
}

.page-topics-index .idx-bar-num {
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
  color: var(--color-ink);
  text-align: right;
  min-width: 22px;
}

.page-topics-index .idx-axes {
  background: var(--color-surface-deep);
}

.page-topics-index .idx-axes-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
}

.page-topics-index .idx-figure-axes {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
}

.page-topics-index .idx-figure-axes img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-topics-index .idx-axis-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--color-line);
}

.page-topics-index .idx-axis-row {
  display: grid;
  grid-template-columns: 14px minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 4px var(--space-2);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-line);
}

.page-topics-index .idx-axis-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  align-self: center;
}

.page-topics-index .idx-axis-title {
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  font-size: var(--text-base);
}

.page-topics-index .idx-axis-meta {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  text-align: right;
  white-space: nowrap;
}

.page-topics-index .idx-axis-desc {
  grid-column: 2 / -1;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-topics-index .idx-notes {
  background: var(--color-surface);
}

.page-topics-index .idx-faq {
  margin: 0;
  border-top: 1px solid var(--color-line);
}

.page-topics-index .idx-faq-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-line);
}

.page-topics-index .idx-faq-item dt {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-topics-index .idx-faq-item dd {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-topics-index .idx-back {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.page-topics-index .idx-back .btn {
  text-decoration: none;
}

@media (min-width: 720px) {
  .page-topics-index .idx-band {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-topics-index .idx-band-item {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-1);
  }

  .page-topics-index .idx-band-label {
    flex: 0 0 auto;
    align-self: flex-start;
  }
}

@media (min-width: 900px) {
  .page-topics-index .idx-top-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: var(--space-6);
  }

  .page-topics-index .idx-cross-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-topics-index .idx-cross-col + .idx-cross-col {
    border-top: 0;
    border-left: 1px solid var(--color-line);
  }

  .page-topics-index .idx-cross-col {
    padding: var(--space-3) var(--space-3);
  }

  .page-topics-index .idx-axes-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: var(--space-4);
    align-items: start;
  }

  .page-topics-index .idx-faq-item {
    grid-template-columns: minmax(0, 0.42fr) minmax(0, 1fr);
    gap: var(--space-4);
    align-items: baseline;
  }

  .page-topics-index .idx-faq-item dt {
    font-size: var(--text-base);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-topics-index .idx-bar-fill {
    transition: none;
  }
}
</main>