/* TOC PANEL */
.toc-panel {
    position: sticky;
    top: 1.5rem;
    align-self: start;

    padding: 1rem 1.1rem;
    background: #101010;
    border: 1px solid #1f1f1f;
    border-radius: 10px;

    font-size: 0.85rem;

    max-height: calc(100vh - 3rem);
    overflow-y: auto;

    scrollbar-width: thin;
    scrollbar-color: var(--border) #111;
}

.toc-panel::-webkit-scrollbar {
    width: 8px;
}

.toc-panel::-webkit-scrollbar-track {
    background: #111;
}

.toc-panel::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 6px;
}

/* ROOT LIST */
.toc-inner {
    list-style: none;
    padding: 0;
    margin: 0;
}

/* LIST ITEM */
.toc-inner li {
    margin: 0.35rem 0;
}

/* ROW (text + arrow ONLY) */
.toc-row {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    position: relative;
}

/* LINKS */
.toc-row a,
.toc-row a:visited {
    color: var(--muted);
    text-decoration: none;

    flex: 1 1 auto;
    min-width: 0;
    line-height: 1.35;
}

.toc-row a:hover {
    color: var(--text);
}

/* ACTIVE */
.toc-row a.is-active {
    color: var(--text);
    font-weight: 600;
}

.toc-row a.is-active::before {
    content: "";
    position: absolute;

    left: -0.5rem;
    top: 50%;
    transform: translateY(-50%);

    width: 3px;
    height: 1.2em;

    background: var(--border);
    border-radius: 2px;
}

/* TOGGLE BUTTON */
.toc-toggle {
    background: transparent;
    border: 0;
    padding: 0 0.25rem;

    color: var(--muted);
    cursor: pointer;

    line-height: 1;
    font-size: 0.95rem;

    display: flex;
    align-items: center;
    justify-content: center;
}

.toc-toggle:hover {
    color: var(--text);
}

.toc-toggle.is-open {
    transform: rotate(90deg);
}

/* NESTED LIST */
.toc-inner ul {
    list-style: none;

    margin: 0.25rem 0 0.25rem 0.4rem;
    padding-left: 0.7rem;

    border-left: 1px solid #222;
}

/* COLLAPSED */
.toc-collapsed {
    display: none;
}

/* MOBILE */
@media (max-width: 900px) {
    .toc-panel {
        display: none;
    }
}