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

.toc__toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-bold);
  color: var(--color-heading-gold);
}

.toc__arrow {
  transition: transform var(--transition-base);
  font-size: 0.875rem;
}
.toc__toggle[aria-expanded="true"] .toc__arrow {
  transform: rotate(180deg);
}

.toc__list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-top: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base), margin-top var(--transition-base);
}
.toc__list.is-open {
  margin-top: 1rem;
  max-height: 50rem;
}

.toc__list a {
  display: block;
  color: var(--color-text-main);
  font-size: var(--font-size-small);
  padding-block: 0.15rem;
  transition: color var(--transition-base);
}
.toc__list a:hover {
  color: var(--color-heading-gold);
}

/* Expanded/collapsed state is driven purely by the .is-open class (toc.js),
   which also sets the default open state on load (open >= 768px, closed below).
   No breakpoint here forces the list open, so the toggle button keeps working
   on every screen size and every page. */