/**
 * toc.css — BEM: toc (быстрая навигация)
 */
.toc {
  padding-top: var(--section-gap);
}
.toc__toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background-color: var(--color-surface);
  color: var(--color-gold);
  font-weight: 600;
  font-size: 0.9375rem;
  text-transform: uppercase;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}
.toc__toggle:hover { background-color: var(--color-bg-dark); }
.toc__arrow {
  transition: transform var(--transition-base);
  flex-shrink: 0;
}
.toc__toggle[aria-expanded="true"] .toc__arrow {
  transform: rotate(180deg);
}

.toc__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  margin-top: 0.5rem;
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--transition-base);
}
.toc__list--open {
  max-height: 60rem;
}
.toc__list--closed {
  max-height: 0;
}
.toc__list li {
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.toc__list li:last-child { border-bottom: none; }
.toc__list a {
  display: block;
  padding: 0.75rem 1.25rem;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.85);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}
.toc__list a:hover {
  color: var(--color-gold);
  background-color: var(--color-bg-dark);
}

@media (min-width: 768px) {
  /* Aperto di default su desktop finché il JS non applica uno stato esplicito
     (evita un flash di contenuto chiuso prima che toggle.js venga eseguito). */
  .toc__list:not(.toc__list--closed) {
    max-height: 60rem;
  }
}