.accordion {
    position: relative;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background-color: var(--color-elevated);
    overflow: hidden;
}

.accordion + .accordion {
    margin-top: var(--space-3);
}

.accordion__bar {
    position: absolute;
    top: 0;
    left: 0;
    height: 3px;
    width: 100%;
    transform: scaleX(0);
    transform-origin: left center;
    background-color: var(--color-primary);
    pointer-events: none;
    z-index: 1;
}

.accordion > summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-5);
    font-weight: var(--weight-semibold);
    color: var(--color-text);
    cursor: pointer;
    list-style: none;
}

.accordion[open] > summary {
    background-color: color-mix(in srgb, var(--color-primary) 6%, transparent);
}

.accordion > summary::-webkit-details-marker {
    display: none;
}

.accordion > summary::after {
    content: "";
    width: 12px;
    height: 12px;
    flex-shrink: 0;
    border-right: 2px solid var(--color-muted);
    border-bottom: 2px solid var(--color-muted);
    transform: rotate(45deg);
    transition: transform var(--transition);
}

.accordion[open] > summary::after {
    transform: rotate(-135deg);
}

.accordion__body {
    padding: var(--space-4) var(--space-5) var(--space-5);
    color: var(--color-text-soft);
}

@media (max-width: 640px) {
    .accordion > summary {
        padding: var(--space-3) var(--space-4);
        font-size: var(--fs-sm);
    }
    .accordion__body {
        padding: var(--space-3) var(--space-4) var(--space-4);
        font-size: var(--fs-sm);
    }
}

.toc {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.toc__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-5);
    font-weight: var(--weight-bold);
    color: var(--color-text);
    cursor: pointer;
    list-style: none;
}

.toc__head::-webkit-details-marker {
    display: none;
}

.toc__head::after {
    content: "";
    width: 11px;
    height: 11px;
    flex-shrink: 0;
    border-right: 2px solid var(--color-muted);
    border-bottom: 2px solid var(--color-muted);
    transform: rotate(45deg);
    transition: transform var(--transition);
}

.toc[open] .toc__head::after {
    transform: rotate(-135deg);
}

.toc[open] .toc__head {
    border-bottom: 1px solid var(--color-border);
}

.toc__list {
    list-style: none;
    margin: 0;
    padding: var(--space-3) var(--space-4);
    display: grid;
    gap: 0;
}

.toc__item a {
    display: flex;
    align-items: baseline;
    gap: 5px;
    padding: 0.3rem var(--space-2);
    border-radius: var(--radius-sm);
    color: var(--color-text-soft);
    font-size: var(--fs-sm);
    transition: color var(--transition), background-color var(--transition);
}

.toc__item a:hover {
    color: var(--color-text);
    background-color: var(--fill-1);
}

.toc__num {
    flex-shrink: 0;
    min-width: 1rem;
    font-weight: var(--weight-bold);
    color: var(--color-muted);
    font-variant-numeric: tabular-nums;
}

.toc__text {
    font-weight: var(--weight-semibold);
}

.toc__sub {
    position: relative;
}

.toc__sub > a {
    padding-left: 2.5rem;
}

.toc__sub::before {
    content: "";
    position: absolute;
    left: 1rem;
    top: -0.15rem;
    width: 0.85rem;
    height: 0.75rem;
    border-left: 1.5px solid var(--color-border-strong);
    border-bottom: 1.5px solid var(--color-border-strong);
    border-bottom-left-radius: 5px;
}

.toc__sub + .toc__sub::before {
    top: -0.55rem;
    height: 1.15rem;
}

.toc__sub .toc__num {
    min-width: 2rem;
    font-weight: var(--weight-semibold);
    color: var(--color-text-soft);
}