/**
 * toc.css — BEM: toc, toc__*
 */

.toc {
  padding-block: 1.5rem;
}

.toc__toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: var(--color-bg-dark);
  color: var(--color-heading);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-body);
  padding: 1rem var(--space-card-padding);
  border-radius: var(--radius-card);
}

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

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

.toc__list {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--transition-base), padding var(--transition-base);
  background: var(--color-bg-dark);
  border-radius: 0 0 var(--radius-card) var(--radius-card);
}

.toc__list.is-open {
  max-height: 60rem;
  padding: 0.5rem var(--space-card-padding) 1rem;
}

.toc__item + .toc__item {
  margin-top: 0.1rem;
}

.toc__link {
  display: block;
  padding: 0.55rem 0;
  font-size: var(--font-size-small);
  color: var(--color-text);
  border-bottom: 1px solid rgba(212, 197, 177, 0.08);
}

.toc__item:last-child .toc__link {
  border-bottom: none;
}

.toc__link:hover {
  color: var(--color-heading);
}