/* ═══════════════════════════════════════════════════════════════════════════
   Post Sidebar / TOC / Sticky Widgets
═══════════════════════════════════════════════════════════════════════════ */
.content-layout {
    display: grid;
    grid-template-columns: 1fr var(--sidebar-width);
    gap: var(--content-gap, 28px);
    align-items: start;
}

.content-layout.sidebar-left {
    grid-template-columns: var(--sidebar-width) 1fr;
}

.content-layout.sidebar-left .sidebar {
    order: -1;
}

.content-layout.sidebar-none {
    grid-template-columns: 1fr;
}

.main-column {
    min-width: 0;
}

.sidebar {
    position: sticky;
    top: calc(var(--header-h) + var(--quicklinks-h) + var(--member-bar-h, 0px) + 18px);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.post-container {
    padding-top: var(--spacing-header-content, 25px);
    padding-bottom: var(--spacing-content-footer, 25px);
}

.toc {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--accent-teal);
    border-radius: var(--radius);
    padding: 16px 18px;
    box-shadow: var(--shadow-sm);
}

.toc--collapsible {
    padding: 0;
    overflow: hidden;
}

.toc-title {
    font-size: var(--fs-sm);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.toc-title--toggle {
    margin-bottom: 0;
    justify-content: space-between;
    padding: 14px 16px;
    cursor: pointer;
    user-select: none;
    list-style: none;
}

.toc-title--toggle::-webkit-details-marker {
    display: none;
}

.toc-title--toggle::marker {
    content: '';
}

.toc-title__main {
    display: inline-flex;
    align-items: center;
    gap: .6rem;
    flex-wrap: wrap;
}

.toc-title__count {
    display: inline-flex;
    align-items: center;
    padding: .22rem .5rem;
    border-radius: 999px;
    background: var(--bg-secondary);
    color: var(--text-muted);
    font-size: .7rem;
    font-weight: 700;
}

.toc-title__chevron {
    color: var(--text-muted);
    transition: transform .2s ease;
}

.toc--collapsible[open] .toc-title__chevron {
    transform: rotate(180deg);
}

.toc-panel {
    padding: 0;
    border-top: 0;
}

.toc--collapsible .toc-panel {
    padding: 0 16px 14px;
    border-top: 1px solid var(--border-color);
}

.toc--collapsible:not([open]) .toc-panel {
    display: none;
}

.toc-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.toc-list li a {
    display: block;
    padding: 4px 6px;
    font-size: var(--fs-xs);
    color: var(--text-muted);
    border-radius: 3px;
    transition: var(--transition-fast);
}

.toc-list li a:hover,
.toc-list li a.active {
    color: var(--accent-teal);
    background: rgba(13,148,136,.07);
}

.toc-list .toc-h3 {
    padding-left: 16px;
}

.social-widget {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 14px 18px;
    box-shadow: var(--shadow-sm);
}

.social-widget-title {
    font-size: var(--fs-sm);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.toc-list--plain {
    list-style: none;
    padding-left: 0;
}

.toc--accent {
    border-left-color: var(--accent-color);
}

.toc--primary {
    border-left-color: var(--primary-color);
}

.toc-muted-count {
    color: var(--text-muted);
    font-size: .85em;
}

.toc-count {
    color: var(--text-light);
    font-size: var(--fs-xs);
    margin-left: 4px;
}

body.dark-mode .toc,
html.dark-mode body .toc {
    background: var(--bg-dark-3);
    border-color: var(--border-dark);
}

body.dark-mode .social-widget,
html.dark-mode body .social-widget {
    background: var(--bg-dark-3);
    border-color: var(--border-dark);
}

body.dark-mode .toc-title__count {
    background: rgba(255,255,255,.06);
    color: var(--text-secondary);
}

body.dark-mode .toc-title__chevron,
body.dark-mode .toc-muted-count,
body.dark-mode .toc-count,
body.dark-mode .toc-list li a {
    color: var(--text-secondary);
}

body.dark-mode .toc--collapsible .toc-panel {
    border-top-color: var(--border-dark);
}

body.dark-mode .social-widget-title {
    color: var(--text-primary);
}

@media (max-width: 768px) {
    .content-layout {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .sidebar {
        position: static;
        order: 0;
        gap: 12px;
    }

    .toc,
    .social-widget {
        padding: 14px 16px;
    }

    .toc-list li a {
        padding: 8px 10px;
        border-radius: 8px;
    }
}

@container (max-width: 700px) {
    .content-layout {
        grid-template-columns: 1fr !important;
    }

    .sidebar {
        display: none;
    }
}