/* Table of contents */
.toc {
  background: var(--color-bg-dark);
  border-radius: var(--radius-card);
  border-left: 3px solid var(--color-heading);
  overflow: hidden;
}
.toc__toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem var(--space-card-padding);
  color: var(--color-white);
  font-weight: var(--fw-bold);
  font-size: 1.05rem;
}
.toc__arrow { transition: transform var(--transition-base); color: var(--color-heading); }
.toc__toggle[aria-expanded="false"] .toc__arrow { transform: rotate(180deg); }
.toc__list {
  display: grid;
  gap: 0.15rem;
  padding: 0 var(--space-card-padding) 1.1rem;
}
.toc__list[hidden] { display: none; }
.toc__list li { display: block; }              /* one item per line, not a grid */
.toc__link {
  display: block;
  padding: 0.5rem 0;
  color: var(--color-text);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: color var(--transition-base), padding-left var(--transition-base);
}
.toc__link:hover { color: var(--color-heading); padding-left: 0.4rem; }
.toc__link::before { content: "›"; color: var(--color-accent-green); margin-right: 0.5rem; }