/* Leaderboard page layout */
.leaderboard-page {
    width: min(95vw, 1800px);
    max-width: 1800px;
    margin: 0 auto;
    padding: calc(var(--nav-height) + 60px) 24px 80px;
    box-sizing: border-box;
}

.leaderboard-hero {
    text-align: center;
    margin-bottom: 32px;
}

.leaderboard-hero .title {
    color: var(--heading);
    margin-bottom: 12px;
}

.leaderboard-hero .subtitle {
    color: #4a4f55;
    max-width: 860px;
    margin: 0 auto 24px;
    line-height: 1.5;
}

.toggle-buttons {
    display: inline-flex;
    gap: 12px;
    margin-top: 8px;
}

.toggle-button {
    padding: 10px 24px;
    font-size: 15px;
    font-weight: 600;
    border-radius: 999px;
    border: 1px solid #d0d4da;
    background: white;
    color: var(--body-font);
    cursor: pointer;
    transition: all 0.2s ease;
}

.toggle-button:hover {
    border-color: var(--UCLA-blue);
    color: var(--UCLA-blue);
}

.toggle-button.active {
    background: var(--UCLA-blue);
    border-color: var(--UCLA-blue);
    color: #fff;
    box-shadow: 0 4px 12px rgba(39, 116, 174, 0.25);
}

.leaderboard-table-wrapper {
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 12px 28px rgba(12, 35, 64, 0.08);
    padding: 28px 32px;
    overflow-x: auto;
}

.leaderboard-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 15px;
    color: var(--body-font);
}

.leaderboard-table thead {
    background: #f5f7fb;
    color: var(--body-font);
}

.leaderboard-table thead tr:first-child th {
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 10px 8px;
    border: 1px solid #dae1eb;
    font-weight: 700;
    text-align: center;
}

.category-placeholder {
    opacity: 0;
    pointer-events: none;
}

.category-group {
    opacity: 0.85;
}

.leaderboard-table thead tr:last-child th {
    padding: 14px 10px;
    text-align: center;
    font-weight: 700;
    border: 1px solid #dae1eb;
    cursor: pointer;
    user-select: none;
}

.leaderboard-table thead tr:last-child th span.header-metric {
    display: inline-block;
}

.leaderboard-table thead tr:last-child th:first-child {
    padding-left: 16px;
}

.leaderboard-table tbody td {
    border: 1px solid #e2e6ed;
    padding: 12px 14px;
    text-align: center;
    background: #fff;
}

.leaderboard-table tbody td:first-child {
    text-align: left;
    font-weight: 600;
}

.leaderboard-table thead tr:last-child th.align-left,
.leaderboard-table tbody td.align-left {
    text-align: left;
}

.leaderboard-table tbody tr:nth-child(odd) td {
    background: #f9fbff;
}

.leaderboard-table tbody tr.variant-pragent td {
    background: #f3f6ff;
}

.leaderboard-table tbody tr.variant-human td {
    background: #fff6f1;
}

.leaderboard-table tbody td.metric-avg {
    color: var(--heading);
}

.leaderboard-note {
    margin-top: 18px;
    font-size: 14px;
    color: #5c6370;
    line-height: 1.5;
}

.leaderboard-intro {
    background: linear-gradient(135deg, rgba(39, 116, 174, 0.08), rgba(255, 209, 0, 0.08));
    border: 1px solid rgba(39, 116, 174, 0.15);
    border-radius: 18px;
    padding: 24px 28px;
    margin-bottom: 28px;
    box-shadow: 0 14px 32px rgba(12, 35, 64, 0.08);
}

.leaderboard-intro p {
    margin: 0 0 12px;
    font-size: 16px;
    color: #3c4250;
}

.leaderboard-intro p:last-child {
    margin-bottom: 0;
}

.leaderboard-insights {
    display: grid;
    gap: 24px;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    margin-bottom: 32px;
}

.insight-card {
    background: #fff;
    border-radius: 18px;
    border: 1px solid #dfe4ed;
    padding: 24px;
    box-shadow: 0 12px 28px rgba(12, 35, 64, 0.08);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.insight-card h2 {
    margin: 0;
    font-size: 20px;
    color: var(--heading);
}

.timeline-note {
    font-size: 14px;
    color: #5c6370;
    margin: 0;
}

.timeline {
    position: relative;
    padding-left: 20px;
}

.timeline::before {
    content: "";
    position: absolute;
    top: 6px;
    left: 6px;
    bottom: 6px;
    width: 2px;
    background: #d9dfeb;
}

.timeline-item {
    position: relative;
    padding-left: 18px;
    margin-bottom: 18px;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-item::before {
    content: "";
    position: absolute;
    left: -14px;
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid var(--UCLA-blue);
    background: #fff;
    box-shadow: 0 2px 6px rgba(12, 35, 64, 0.2);
}

.timeline-date {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--UCLA-darkblue);
}

.timeline-title {
    margin-top: 4px;
    font-size: 16px;
    font-weight: 600;
    color: var(--body-font);
}

.timeline-text {
    margin: 6px 0 0;
    font-size: 14px;
    color: #5c6370;
    line-height: 1.5;
}

.timeline-metrics {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 8px;
}

.metric-chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    font-size: 13px;
    border-radius: 999px;
    background: #f1f4fa;
    color: #3c4250;
    border: 1px solid #e0e6f0;
}

.metric-chip.gain {
    background: rgba(39, 116, 174, 0.12);
    border-color: rgba(39, 116, 174, 0.35);
    color: var(--UCLA-darkblue);
}

.chart-wrapper {
    width: 100%;
    min-height: 220px;
}

.chart-note {
    font-size: 14px;
    color: #5c6370;
    margin: 0;
    line-height: 1.5;
}

.timeline-note code,
.chart-note code {
    font-size: 13px;
    background: #f1f3f8;
    border-radius: 6px;
    padding: 2px 6px;
}

.chart-card {
    gap: 12px;
}

.chart-block {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.chart-subtitle {
    margin: 0;
    font-size: 15px;
    font-weight: 600;
    color: var(--body-font);
}

.chart-note--top {
    margin-top: 0;
}

@media screen and (max-width: 960px) {
    .leaderboard-page {
        padding: calc(var(--nav-height) + 40px) 16px 64px;
    }

    .leaderboard-table-wrapper {
        padding: 20px;
    }

    .leaderboard-table {
        font-size: 14px;
    }

    .leaderboard-table thead th {
        padding: 12px 8px;
    }

    .toggle-buttons {
        flex-wrap: wrap;
    }

    .leaderboard-intro {
        padding: 20px;
    }

    .leaderboard-insights {
        grid-template-columns: 1fr;
    }
}