.toc {
  background: var(--color-bg-dark);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  margin-bottom: var(--space-lg);
}

.toc__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  cursor: pointer;
  user-select: none;
}

.toc__title {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-light);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.toc__title::before {
  content: "≡";
  color: var(--color-heading-gold);
  font-size: 1.1rem;
}

.toc__arrow {
  color: var(--color-heading-gold);
  font-size: 1.1rem;
  transition: transform var(--transition-base);
  line-height: 1;
}

.toc.is-open .toc__arrow {
  transform: rotate(180deg);
}

.toc__body {
  border-top: 1px solid var(--color-border);
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--transition-slow);
}

.toc.is-open .toc__body {
  max-height: 600px;
}

.toc__list {
  list-style: none;
  padding: 0.75rem 1.25rem 1rem;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.toc__item {
  margin: 0;
}

.toc__link {
  display: block;
  color: var(--color-text-main);
  font-size: var(--font-size-sm);
  padding: 0.3rem 0;
  transition: color var(--transition-base);
  border-left: 2px solid transparent;
  padding-left: 0.75rem;
}

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