/* ===== Table of contents (quick navigation) ===== */
.toc {
  background: var(--card-bg);
  border-radius: var(--radius-card);
  padding: var(--space-card-pad);
}
.toc__header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: var(--white);
  font-weight: var(--fw-bold);
  font-size: 1.1rem;
}
.toc__arrow { transition: transform var(--transition-base); color: var(--accent-light); }
.toc__header[aria-expanded="true"] .toc__arrow { transform: rotate(180deg); }
.toc__panel {
  overflow: hidden;
  display: grid;
  grid-template-rows: 1fr;
  transition: grid-template-rows var(--transition-base);
}
.toc__panel[hidden] { display: grid; grid-template-rows: 0fr; }
.toc__panel-inner { min-height: 0; overflow: hidden; padding-top: 1rem; }
.toc__list { display: flex; flex-direction: column; gap: 0.5rem; }
.toc__link {
  display: block;
  color: var(--text-body);
  padding: 0.35rem 0;
  transition: color var(--transition-base);
}
.toc__link:hover { color: var(--accent-light); }