/**
 * toc.css — BEM: toc, toc__*
 * Collapsed by default on screens < 768px, expanded by default on >= 768px.
 */

.toc {
  background: var(--color-bg-dark);
  border-radius: var(--radius-card);
  padding: var(--space-card-padding);
  margin-block: var(--space-paragraph);
}

.toc__toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  color: var(--color-heading-gold);
  font-weight: var(--font-weight-semibold);
  font-size: 1rem;
}

.toc__arrow {
  transition: transform var(--transition-base);
  flex-shrink: 0;
}

.toc__toggle[aria-expanded="true"] .toc__arrow {
  transform: rotate(180deg);
}

.toc__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.65rem;
  grid-template-rows: 0fr;
  grid-auto-rows: 0fr;
  overflow: hidden;
  transition: grid-template-rows var(--transition-base), grid-auto-rows var(--transition-base);
}

.toc__list > li {
  min-height: 0;
  overflow: hidden;
}

.toc[data-open="true"] .toc__list {
  grid-template-rows: 1fr;
  grid-auto-rows: 1fr;
  margin-top: 1rem;
}

.toc__link {
  display: block;
  color: var(--color-text-body);
  font-size: 0.9rem;
  transition: color var(--transition-base);
}

.toc__link:hover,
.toc__link:focus-visible {
  color: var(--color-heading-gold);
}

@media (min-width: 768px) {
  .toc[data-open="true"] .toc__list > li {
    overflow: visible;
  }
}