/**
 * toc.css
 */
.toc {
  background: var(--color-surface);
  border-radius: var(--radius-card-sm);
  padding: var(--space-sm-md) var(--space-card-padding);
  margin-block: var(--space-xl);
}

.toc__toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm-md);
  color: var(--color-heading-gold);
  font-weight: var(--fw-semibold);
  font-size: var(--fs-h3);
  text-transform: uppercase;
}

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

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

.toc__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--transition-base);
}

.toc__panel[data-open='true'] {
  grid-template-rows: 1fr;
  margin-top: var(--space-sm-md);
}

/* На экранах >= 768px TOC раскрыт по умолчанию ещё до инициализации JS. */
@media (min-width: 768px) {
  .toc__panel:not([data-open='false']) {
    grid-template-rows: 1fr;
    margin-top: var(--space-sm-md);
  }
}

.toc__panel-inner {
  overflow: hidden;
  min-height: 0;
}

.toc__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.toc__link {
  display: block;
  color: var(--color-text-primary);
  font-size: var(--fs-small);
  padding: var(--space-xs) 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: color var(--transition-fast);
}

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

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