/* ═══════════════════════════════════════════════════════════════════════════
   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: color-mix(in srgb, var(--bg-primary) 72%, var(--bg-secondary) 28%);
    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;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.toc-list--nested {
    margin-top: 4px;
    margin-left: 8px;
    padding-left: 12px;
    border-left: 1px solid color-mix(in srgb, var(--border-color) 82%, transparent 18%);
}

.toc-item {
    list-style: none;
}

.toc-link {
    display: block;
    padding: 4px 4px;
    font-size: var(--fs-xs);
    color: var(--text-muted);
    transition: var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.toc-item--level-2 > .toc-link {
    font-weight: 600;
    color: var(--text-secondary);
}

.toc-item--level-3 > .toc-link {
    font-size: .78rem;
}

.toc-link:hover,
.toc-link:focus-visible,
.toc-link.active {
    color: var(--accent-teal);
    background: rgba(13,148,136,.07);
}

.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;
}

@media (min-width: 769px) {
    .sidebar .social-widget .social-icons {
        display: grid;
        grid-template-columns: repeat(var(--sidebar-social-columns, 3), minmax(0, 1fr));
        width: 100%;
        gap: 8px;
    }

    .sidebar .social-widget .social-icons a {
        width: 100%;
        min-width: 0;
    }

    .sidebar .toc--primary .toc-list {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 8px;
    }

    .sidebar .toc--primary .toc-item {
        min-width: 0;
    }

    .sidebar .toc--primary .toc-link {
        display: block;
        width: 100%;
        min-width: 0;
        min-height: 30px;
        padding: 4px 10px;
        border: 1px solid color-mix(in srgb, var(--border-color) 88%, var(--primary-color) 12%);
        border-radius: 4px;
        background: color-mix(in srgb, var(--bg-primary) 78%, var(--bg-secondary) 22%);
        color: var(--text-secondary);
        font-size: .78rem;
        font-weight: 600;
        line-height: 1.2;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        box-shadow: inset 0 1px 0 rgba(255,255,255,.45);
    }

    .sidebar .toc--primary .toc-link:hover,
    .sidebar .toc--primary .toc-link:focus-visible,
    .sidebar .toc--primary .toc-link.active {
        background: color-mix(in srgb, var(--accent-teal) 8%, var(--bg-primary) 92%);
        border-color: color-mix(in srgb, var(--accent-teal) 22%, var(--border-color) 78%);
        color: var(--text-primary);
    }
}

.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: color-mix(in srgb, var(--bg-dark-3) 82%, var(--bg-dark-2) 18%);
    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-link {
    color: var(--text-secondary);
}

body.dark-mode .toc-list--nested {
    border-left-color: color-mix(in srgb, var(--border-dark) 85%, transparent 15%);
}

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

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

@media (min-width: 769px) {
    body.dark-mode .sidebar .toc--primary .toc-link {
        background: color-mix(in srgb, var(--bg-dark-3) 84%, var(--bg-dark-2) 16%);
        border-color: color-mix(in srgb, var(--border-dark) 84%, rgba(148, 163, 184, .18) 16%);
        color: var(--text-secondary);
        box-shadow: none;
    }

    body.dark-mode .sidebar .toc--primary .toc-link:hover,
    body.dark-mode .sidebar .toc--primary .toc-link:focus-visible,
    body.dark-mode .sidebar .toc--primary .toc-link.active {
        background: color-mix(in srgb, var(--accent-teal) 14%, var(--bg-dark-3) 86%);
        border-color: color-mix(in srgb, var(--accent-teal) 28%, var(--border-dark) 72%);
        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-link {
        padding: 8px 10px;
        border-radius: 8px;
    }
}

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

    .sidebar {
        display: none;
    }
}