.timeline-hero-grid {
    grid-template-columns: minmax(0, 1.38fr) minmax(300px, 0.62fr);
    align-items: start;
}

.timeline-highlight-card {
    padding: 18px;
    display: grid;
    gap: 14px;
    align-content: start;
}

.timeline-anchor-title {
    color: var(--text-strong);
    font-size: 1rem;
    line-height: 1.3;
}

.timeline-layout {
    display: grid;
    grid-template-columns: minmax(248px, 282px) minmax(0, 1fr);
    gap: 20px;
    align-items: start;
}

.timeline-filter-rail {
    position: sticky;
    top: calc(var(--nav-height) + 14px);
}

.timeline-filter-rail .drawer-panel {
    position: relative;
    border: 1px solid rgba(96, 130, 168, 0.14);
    border-radius: 22px;
    background: linear-gradient(180deg, rgba(11, 18, 28, 0.88), rgba(8, 14, 22, 0.96));
    box-shadow: 0 16px 34px rgba(0, 0, 0, 0.22);
}

.timeline-filter-rail .drawer-panel::before {
    content: '';
    position: absolute;
    inset: 0 0 auto;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.48), transparent);
}

.timeline-content {
    display: grid;
    gap: 20px;
}

.timeline-status-panel {
    padding: 18px;
    background: linear-gradient(180deg, rgba(11, 18, 28, 0.8), rgba(8, 14, 22, 0.92));
}

.timeline-results-bar {
    margin-bottom: 0;
}

.timeline-era-nav {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
}

.nav-jump {
    appearance: none;
    display: grid;
    gap: 8px;
    width: 100%;
    padding: 16px;
    text-align: left;
    border-radius: 20px;
    border: 1px solid rgba(96, 130, 168, 0.16);
    background: linear-gradient(180deg, rgba(13, 21, 32, 0.9), rgba(10, 17, 26, 0.96));
    color: var(--text);
    cursor: pointer;
    transition:
        transform var(--transition-fast),
        border-color var(--transition-fast),
        background var(--transition-fast);
}

.nav-jump:hover {
    transform: translateY(-2px);
    border-color: rgba(0, 212, 255, 0.22);
}

.nav-jump[data-era='1947-1968'] {
    background:
        radial-gradient(circle at top right, rgba(0, 212, 255, 0.14), transparent 38%),
        linear-gradient(180deg, rgba(13, 21, 32, 0.92), rgba(9, 16, 25, 1));
}

.nav-jump[data-era='1969-2003'] {
    background:
        radial-gradient(circle at top right, rgba(216, 177, 106, 0.16), transparent 40%),
        linear-gradient(180deg, rgba(14, 21, 30, 0.92), rgba(9, 15, 23, 1));
}

.nav-jump[data-era='2004-2017'] {
    background:
        radial-gradient(circle at top right, rgba(143, 232, 255, 0.16), transparent 40%),
        linear-gradient(180deg, rgba(11, 19, 30, 0.92), rgba(8, 15, 24, 1));
}

.nav-jump[data-era='2017-present'] {
    background:
        radial-gradient(circle at top right, rgba(0, 212, 255, 0.18), transparent 36%),
        linear-gradient(180deg, rgba(12, 20, 31, 0.94), rgba(8, 14, 22, 1));
}

.nav-jump-title {
    color: var(--text-strong);
    font-size: 1rem;
    line-height: 1.2;
}

.timeline-era-stack {
    display: grid;
    gap: 22px;
}

.era-section {
    position: relative;
    padding: 22px;
    overflow: hidden;
}

.era-section::after {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.025), transparent 26%);
}

.era-section[data-era='1947-1968'] {
    background:
        radial-gradient(circle at top right, rgba(0, 212, 255, 0.14), transparent 28%),
        linear-gradient(180deg, rgba(11, 20, 31, 0.96), rgba(7, 13, 20, 1));
}

.era-section[data-era='1969-2003'] {
    background:
        radial-gradient(circle at top right, rgba(216, 177, 106, 0.16), transparent 30%),
        linear-gradient(180deg, rgba(13, 20, 29, 0.96), rgba(8, 13, 21, 1));
}

.era-section[data-era='2004-2017'] {
    background:
        radial-gradient(circle at top right, rgba(143, 232, 255, 0.16), transparent 30%),
        linear-gradient(180deg, rgba(10, 18, 29, 0.96), rgba(7, 14, 22, 1));
}

.era-section[data-era='2017-present'] {
    background:
        radial-gradient(circle at top right, rgba(0, 212, 255, 0.18), transparent 30%),
        linear-gradient(180deg, rgba(10, 19, 30, 0.98), rgba(6, 12, 20, 1));
}

.era-header {
    position: relative;
    z-index: 1;
    display: grid;
    gap: 12px;
    margin-bottom: 20px;
}

.era-chapter-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.era-chapter-index,
.era-chapter-deck {
    font-family: 'Space Mono', monospace;
    font-size: 0.68rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.era-chapter-index {
    color: var(--accent-ice);
}

.era-chapter-deck {
    color: var(--muted-strong);
}

.era-title-row {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.era-title {
    margin: 0;
    color: var(--text-strong);
    font-size: clamp(2rem, 3vw, 3rem);
    line-height: 0.94;
    letter-spacing: -0.05em;
}

.era-copy {
    margin: 0;
    max-width: 70ch;
}

.era-metrics {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
}

.era-metric {
    padding: 14px 16px;
    border-radius: 18px;
    border: 1px solid rgba(96, 130, 168, 0.14);
    background: rgba(255, 255, 255, 0.026);
    display: grid;
    gap: 6px;
}

.era-metric-value {
    color: var(--text-strong);
    font-size: 1.4rem;
    font-weight: 700;
    line-height: 1;
}

.era-metric-label {
    color: var(--muted);
    font-family: 'Space Mono', monospace;
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.event-list {
    position: relative;
    display: grid;
    gap: 14px;
    padding-left: 30px;
}

.event-list::before {
    content: '';
    position: absolute;
    left: 11px;
    top: 6px;
    bottom: 6px;
    width: 1px;
    background: linear-gradient(180deg, rgba(0, 212, 255, 0.44), rgba(255, 255, 255, 0.04));
}

.event-node {
    position: relative;
}

.event-node::before {
    content: '';
    position: absolute;
    left: -30px;
    top: 26px;
    width: 12px;
    height: 12px;
    border-radius: 999px;
    background: rgba(0, 212, 255, 0.88);
    box-shadow: 0 0 0 5px rgba(0, 212, 255, 0.12);
}

.event-node[data-tone='strong']::before {
    background: #8fe8ff;
}

.event-node[data-tone='moderate']::before {
    background: var(--accent-amber);
    box-shadow: 0 0 0 5px rgba(216, 177, 106, 0.12);
}

.event-node[data-tone='contested']::before {
    background: var(--danger);
    box-shadow: 0 0 0 5px rgba(241, 125, 133, 0.12);
}

.event-node[data-tone='pending']::before {
    background: rgba(186, 209, 228, 0.76);
    box-shadow: 0 0 0 5px rgba(186, 209, 228, 0.1);
}

.event-node[data-highlight='true']::before,
.event-node.is-anchor::before {
    width: 14px;
    height: 14px;
}

.event-shell {
    padding: 18px;
    border-radius: 22px;
    border: 1px solid rgba(96, 130, 168, 0.14);
    background: linear-gradient(180deg, rgba(13, 21, 32, 0.9), rgba(9, 16, 25, 1));
    transition:
        border-color var(--transition-fast),
        background var(--transition-fast);
}

.event-node.is-open .event-shell,
.event-node:hover .event-shell {
    border-color: rgba(0, 212, 255, 0.2);
    background: linear-gradient(180deg, rgba(13, 21, 32, 0.96), rgba(9, 17, 26, 1));
}

.event-node.is-anchor .event-shell {
    border-color: rgba(0, 212, 255, 0.22);
    background:
        radial-gradient(circle at top right, rgba(0, 212, 255, 0.14), transparent 32%),
        linear-gradient(180deg, rgba(14, 23, 36, 0.98), rgba(9, 17, 26, 1));
    box-shadow: 0 20px 42px rgba(0, 0, 0, 0.24);
}

.event-topline,
.event-date-block,
.event-utility,
.event-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}

.event-date-block {
    align-items: baseline;
}

.event-date {
    color: var(--accent);
    font-size: 0.74rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    font-family: 'Space Mono', monospace;
}

.event-toggle {
    appearance: none;
    width: 100%;
    margin-top: 12px;
    padding: 0;
    border: 0;
    background: none;
    color: inherit;
    text-align: left;
    cursor: pointer;
    display: grid;
    gap: 10px;
}

.event-anchor-note {
    color: var(--accent-ice);
    font-family: 'Space Mono', monospace;
    font-size: 0.68rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.event-title {
    margin: 0;
    color: var(--text-strong);
    font-size: clamp(1.72rem, 2.6vw, 2.6rem);
    line-height: 0.94;
    letter-spacing: -0.05em;
}

.event-node.is-anchor .event-title {
    font-size: clamp(1.92rem, 2.9vw, 3rem);
}

.event-location {
    margin-top: 6px;
    color: var(--muted);
    font-size: 0.9rem;
}

.event-arrow {
    color: var(--muted);
    font-family: 'Space Mono', monospace;
    font-size: 1.1rem;
    transition: transform var(--transition-fast), color var(--transition-fast);
}

.event-node.is-open .event-arrow {
    color: var(--accent);
    transform: rotate(90deg);
}

.event-summary {
    margin: 0;
}

.event-utility {
    margin-top: 14px;
    align-items: center;
}

.event-dossier-link {
    min-height: 38px;
    padding: 0.62rem 0.92rem;
    font-size: 0.82rem;
}

.event-panel {
    display: grid;
    gap: 16px;
    margin-top: 16px;
}

.event-panel[hidden] {
    display: none;
}

.event-panel-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(280px, 0.92fr);
    gap: 18px;
}

.event-body,
.event-side {
    display: grid;
    gap: 14px;
}

.event-side .case-poster {
    min-height: 230px;
}

.event-node.is-anchor .event-side .case-poster {
    min-height: 276px;
}

.timeline-drawer-toggle {
    display: none;
}

@media (max-width: 1180px) {
    .timeline-era-nav {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 960px) {
    .timeline-hero-grid,
    .timeline-layout {
        grid-template-columns: 1fr;
    }

    .timeline-filter-rail {
        position: static;
    }

    .timeline-drawer-toggle {
        display: inline-flex;
    }

    .timeline-filter-rail .drawer-panel {
        display: none;
    }

    .timeline-filter-rail .drawer-panel.is-mobile {
        display: grid;
    }
}

@media (max-width: 760px) {
    .timeline-era-nav,
    .era-metrics,
    .event-panel-grid {
        grid-template-columns: 1fr;
    }

    .event-list {
        padding-left: 22px;
    }

    .event-node::before {
        left: -22px;
    }

    .event-shell {
        padding: 16px;
    }
}