/* toc.css */
.toc {
    background: var(--color-card);
    border-radius: var(--radius-card);
    padding: 0.5rem 0.75rem;
    box-shadow: var(--shadow-soft);
}

.toc__toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 0.75rem 0.5rem;
    color: var(--color-heading);
    font-weight: var(--fw-bold);
    font-size: var(--fs-h3);
}

.toc__toggle-icon {
    width: 0.7rem;
    height: 0.7rem;
    border-right: 3px solid var(--color-accent-yellow);
    border-bottom: 3px solid var(--color-accent-yellow);
    transform: rotate(45deg);
    transition: transform var(--transition-base);
    flex-shrink: 0;
    margin-left: 1rem;
}

.toc__toggle[aria-expanded="true"] .toc__toggle-icon {
    transform: rotate(-135deg);
}

.toc__panel {
    padding: 0.25rem 0.5rem 0.75rem;
}

.toc__list {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.toc__link {
    display: block;
    padding: 0.55rem 0.6rem;
    color: var(--color-text);
    border-radius: 4px;
    border-left: 3px solid transparent;
    transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}

.toc__link:hover {
    color: var(--color-heading);
    background: rgba(255, 209, 42, 0.08);
    border-left-color: var(--color-accent-yellow);
}