/**
 * TOC block (BEM)
 */
.toc { padding-block-start: var(--space-section); }

.toc__box {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-card-padding);
}

.toc__toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  font-size: var(--fs-h3);
  font-weight: var(--fw-semibold);
  color: var(--color-gold);
}
.toc__arrow { transition: transform var(--transition-fast); flex-shrink: 0; color: var(--color-gold); }
.toc__toggle[aria-expanded="true"] .toc__arrow { transform: rotate(180deg); }

.toc__list {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  margin-top: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base), margin-top var(--transition-base);
}
.toc__box.is-open .toc__list {
  margin-top: 1rem;
  max-height: 60rem;
}

.toc__link {
  display: block;
  font-size: var(--fs-small);
  color: var(--color-text-primary);
  padding: 0.25rem 0;
  transition: color var(--transition-fast);
}
.toc__link:hover { color: var(--color-gold); }

.toc__list--nested {
  padding-left: 1.25rem;
}