.page-topics {
  --topics-rule-thin: var(--border-thin) solid var(--color-line);
  --topics-bar-h: 14px;
  --topics-strip-w: 6.5rem;
}

.page-topics .breadcrumbs {
  padding: var(--space-4) 0 var(--space-2);
}

.page-topics .topics-band {
  border-top: var(--topics-rule-thin);
  padding: var(--space-8) 0;
}

.page-topics .topics-band--hero {
  border-top: 0;
  padding-top: 0;
}

.page-topics .topics-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
  border-top: var(--border-thick) solid var(--color-primary);
  padding-top: var(--space-4);
}

.page-topics .topics-hero__title {
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  margin: 0;
  overflow-wrap: anywhere;
}

.page-topics .topics-hero__figures {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: var(--topics-rule-thin);
}

.page-topics .topics-hero__figures .stat {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: baseline;
  gap: var(--space-1);
  padding: var(--space-2) 0;
  border-bottom: var(--topics-rule-thin);
}

.page-topics .topics-figure {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: 1.05;
  letter-spacing: 0.02em;
  color: var(--color-ink);
  border-bottom: var(--border-thick) solid var(--color-primary);
  padding-bottom: 2px;
  align-self: start;
  white-space: nowrap;
}

.page-topics .topics-hero__figures .stat__label {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

.page-topics .topics-hero__lower {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-8);
}

.page-topics .topics-hero__desc {
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
  margin: 0;
}

.page-topics .topics-hero__actions,
.page-topics .next-step__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.page-topics .topics-hero__figure,
.page-topics .topics-figure-block {
  margin: 0;
}

.page-topics .topics-hero__figure img,
.page-topics .topics-figure-block img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 0;
}

.page-topics .topics-hero__figure .figure__caption,
.page-topics .topics-figure-block .figure__caption {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  margin-top: var(--space-1);
}

.page-topics .topics-figure-block {
  margin-top: var(--space-4);
}

.page-topics .topics-scope__note {
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  margin: var(--space-4) 0 0;
}

.page-topics .range-bar {
  display: grid;
  gap: var(--space-1);
  margin-top: var(--space-4);
}

.page-topics .range-row {
  display: grid;
  grid-template-columns: 5rem minmax(0, 1fr) 3rem;
  align-items: center;
  gap: var(--space-2);
  min-height: 28px;
}

.page-topics .range-row__label {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-topics .range-row__track {
  position: relative;
  display: block;
  height: var(--topics-bar-h);
  background: var(--color-surface-deep);
}

.page-topics .range-row__fill {
  position: absolute;
  inset: 0 auto 0 0;
  display: block;
  background: var(--color-primary-soft);
}

.page-topics .range-row__mark {
  position: absolute;
  top: -3px;
  bottom: -3px;
  right: 0;
  width: var(--border-thick);
  background: var(--color-accent);
}

.page-topics .range-row__value {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
  color: var(--color-ink);
  text-align: right;
}

.page-topics .topics-figure__note {
  font-size: var(--text-xs);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
  margin: var(--space-2) 0 0;
}

.page-topics .topic-list {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
}

.page-topics .topic-list--tight {
  margin-top: var(--space-4);
}

.page-topics .topic-item {
  border-top: var(--topics-rule-thin);
  padding: var(--space-3) 0;
}

.page-topics .topic-item:last-child {
  border-bottom: var(--topics-rule-thin);
}

.page-topics .topic-item__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
}

.page-topics .topic-item__title {
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  margin: 0;
}

.page-topics .topic-item__num {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  letter-spacing: 0.02em;
  color: var(--color-ink);
  border-bottom: var(--border-thick) solid var(--color-primary);
  white-space: nowrap;
}

.page-topics .topic-item__text {
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
  margin: var(--space-2) 0 0;
}

.page-topics .topic-item__note {
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
  margin: var(--space-1) 0 0;
}

.page-topics .minutes-stack-group {
  display: grid;
  gap: var(--space-4);
}

.page-topics .minutes-stack__name {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  margin: 0 0 var(--space-1);
}

.page-topics .minutes-stack__bar {
  display: flex;
  width: 100%;
  height: 28px;
  background: var(--color-surface-deep);
}

.page-topics .minutes-stack__seg {
  display: block;
  height: 100%;
}

.page-topics .minutes-stack__seg--start {
  background: var(--color-contrast-surface);
}

.page-topics .minutes-stack__seg--sub {
  background: var(--color-surface-deep);
  border-left: var(--topics-rule-thin);
}

.page-topics .minutes-stack__seg--extra {
  background: var(--color-primary);
  border-left: var(--topics-rule-thin);
}

.page-topics .minutes-stack__legend {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  margin: var(--space-1) 0 0;
}

.page-topics .minutes-stack__legend b {
  font-family: var(--font-mono);
  font-weight: var(--weight-body);
  color: var(--color-ink-soft);
}

.page-topics .split-compare {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin-top: var(--space-4);
  border-top: var(--border-thick) solid var(--color-contrast-surface);
}

.page-topics .split-compare__col {
  padding: var(--space-4) 0;
  border-bottom: var(--topics-rule-thin);
}

.page-topics .split-compare__title {
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  margin: 0;
}

.page-topics .split-compare__text {
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
  margin: var(--space-2) 0 var(--space-3);
}

.page-topics .split-compare__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
  border: var(--topics-rule-thin);
  padding: var(--space-1) var(--space-2);
}

.page-topics .split-compare__tag--accent {
  color: var(--color-primary-ink);
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.page-topics .step-list {
  list-style: none;
  counter-reset: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  border-top: var(--topics-rule-thin);
}

.page-topics .step {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-1);
  padding: var(--space-4) 0;
  border-bottom: var(--topics-rule-thin);
}

.page-topics .step__num {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--color-accent);
}

.page-topics .step__title {
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  margin: 0;
}

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

.page-topics .topics-band--index {
  padding-bottom: var(--space-8);
}

.page-topics .index-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  border-top: var(--topics-rule-thin);
}

.page-topics .index-card {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-4) 0;
  border-bottom: var(--topics-rule-thin);
  color: var(--color-ink);
  text-decoration: none;
  transition: background-color 120ms linear;
}

.page-topics .index-card:hover,
.page-topics .index-card:focus-visible {
  background: var(--color-highlight);
}

.page-topics .index-card__key {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-primary);
  text-transform: uppercase;
}

.page-topics .index-card__title {
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}

.page-topics .index-card__desc {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-topics .next-step {
  margin-top: var(--space-6);
  padding: var(--space-4);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-top: var(--border-thick) solid var(--color-primary);
}

.page-topics .next-step__text {
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  margin: 0;
}

.page-topics .next-step__actions .btn--primary {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-topics .next-step__actions .btn--line {
  border-color: var(--color-contrast-line);
  color: var(--color-contrast-ink);
  background: transparent;
}

.page-topics .next-step__actions .btn--line:hover,
.page-topics .next-step__actions .btn--line:focus-visible {
  background: var(--color-contrast-accent);
  border-color: var(--color-contrast-accent);
  color: var(--color-primary-ink);
}

.page-topics .next-step__extra {
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  margin: var(--space-4) 0 0;
}

.page-topics .next-step__extra a {
  color: var(--color-contrast-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-topics .next-step__extra a:hover,
.page-topics .next-step__extra a:focus-visible {
  color: var(--color-contrast-ink);
}

@media (hover: hover) and (min-width: 960px) {
  .page-topics .topic-item__note {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin-top: 0;
    transition: max-height 120ms linear, opacity 120ms linear, margin-top 120ms linear;
  }

  .page-topics .topic-item:hover .topic-item__note,
  .page-topics .topic-item:focus-within .topic-item__note {
    max-height: 8rem;
    opacity: 1;
    margin-top: var(--space-1);
  }
}

@media (max-width: 599px) {
  .page-topics .topics-figure {
    font-size: var(--text-lg);
  }

  .page-topics .range-row {
    grid-template-columns: 4.25rem minmax(0, 1fr) 2.5rem;
  }

  .page-topics .topic-item__num {
    font-size: var(--text-base);
  }
}

@media (min-width: 960px) {
  .page-topics .topics-band {
    padding: var(--section-y) 0;
  }

  .page-topics .topics-band--hero {
    padding: var(--space-6) 0 var(--section-y);
  }

  .page-topics .topics-hero__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--gutter);
    align-items: start;
  }

  .page-topics .topics-hero__title {
    grid-column: 1 / 7;
  }

  .page-topics .topics-hero__figures {
    grid-column: 7 / 13;
  }

  .page-topics .topics-hero__figures .stat {
    grid-template-columns: auto minmax(0, 1fr);
    gap: var(--space-3);
  }

  .page-topics .topics-figure {
    font-size: var(--text-2xl);
  }

  .page-topics .topics-hero__lower {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--gutter);
    align-items: end;
  }

  .page-topics .topics-hero__lead {
    grid-column: 1 / 7;
  }

  .page-topics .topics-hero__figure {
    grid-column: 8 / 13;
  }

  .page-topics .split-compare {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0;
  }

  .page-topics .split-compare__col {
    padding: var(--space-6) var(--space-4) var(--space-6) 0;
  }

  .page-topics .split-compare__col + .split-compare__col {
    padding-left: var(--space-4);
    border-left: var(--topics-rule-thin);
  }

  .page-topics .step {
    grid-template-columns: 5rem minmax(0, 12rem) minmax(0, 1fr);
    align-items: baseline;
    gap: var(--space-4);
  }

  .page-topics .step__num {
    grid-column: 1 / 2;
  }

  .page-topics .step__title {
    grid-column: 2 / 3;
  }

  .page-topics .step__text {
    grid-column: 3 / 4;
  }

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

  .page-topics .index-card {
    padding: var(--space-4) var(--space-3) var(--space-4) 0;
    border-right: var(--topics-rule-thin);
    border-bottom: var(--topics-rule-thin);
  }

  .page-topics .index-card:last-child {
    border-right: 0;
  }

  .page-topics .topics-figure-block {
    margin-top: var(--space-6);
  }
}