/* ==========================================================================
   Table of contents (quick navigation)
   ========================================================================== */
.toc {
  background: var(--color-card);
  border-radius: var(--radius-card);
  padding: 0.5rem;
  margin-bottom: var(--space-section);
}

.toc__toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0.9rem 1rem;
  color: var(--color-heading);
  font-weight: var(--fw-bold);
  font-size: 1.05rem;
}

.toc__arrow {
  width: 0;
  height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-top: 7px solid var(--color-heading);
  transition: transform var(--transition-fast);
}

.toc__toggle[aria-expanded="false"] .toc__arrow {
  transform: rotate(-90deg);
}

.toc__list {
  display: grid;
  gap: 0.15rem;
  padding: 0.25rem 0.5rem 0.75rem;
  overflow: hidden;
}

.toc__list[hidden] {
  display: none;
}

.toc__item a {
  display: block;
  padding: 0.55rem 0.6rem;
  color: var(--color-text);
  border-left: 2px solid transparent;
  border-radius: 4px;
  transition: color var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
}

.toc__item a:hover,
.toc__item a:focus-visible {
  color: var(--color-white);
  border-left-color: var(--color-heading);
  background: rgba(255, 211, 41, 0.08);
}

.toc__counter {
  color: var(--color-heading);
  font-weight: var(--fw-bold);
  margin-right: 0.5rem;
}