/* ── Palette ──────────────────────────────────────────── */
:root {
    --bg: #0B1527;
    --bg-opaque: rgba(11, 21, 39, 0.45);
    --bg-surface: #1a1a2e;
    --teal: #58b1c3;
    --green: #6fcf97;
    --red: #ff4d6d;
    --pink: #ff6ec7;
    --purple: #9b5de5;
    --blue: #007F9E;
    --neutral: #667788;
    --text: #e8e8e8;
    --text-muted: #8899aa;
    --text-dim: #5a6a7a;
    --border: rgba(255, 255, 255, 0.15);
    --btn-hover-bg: rgba(255, 255, 255, 0.03);
    --btn-active-bg: rgba(88, 177, 195, 0.12);
    --btn-active-border: rgba(88, 177, 195, 0.3);
    --sidebar-active-bg: rgba(88, 177, 195, 0.04);
    --row-hover-bg: rgba(255, 255, 255, 0.02);
    --row-border: rgba(255, 255, 255, 0.03);
    --code-bg: rgba(88, 177, 195, 0.1);
    --tooltip-bg: #2c3e50;
    --tooltip-text: #f1f1f1;
    --tooltip-body: #d9d9d9;
}

/* ── Reset & Base ─────────────────────────────────────── */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    background: radial-gradient(
            60rem 40rem at 50% -45px,
            rgba(0, 226, 213, 0.35),
            rgba(18, 208, 254, 0.25) 30%,
            transparent 70%
    ), var(--bg);
}

body {
    font-family: "Montserrat", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    position: relative;
}

code {
    background: var(--code-bg);
    color: var(--teal);
    padding: 0.15em 0.45em;
    border-radius: 4px;
    font-size: 0.95em;
}

/* ── Page Layout ─────────────────────────────────────── */
.page {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: row;
    min-height: 100vh;
    max-width: 1440px;
    margin: 0 auto;
}

/* ── Sidebar ─────────────────────────────────────────── */
.sidebar {
    width: 280px;
    max-width: 300px;
    flex-shrink: 0;
    padding: 2rem 0;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-logo {
    display: block;
    padding: 0 1.25rem 3.25rem;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
}

.sidebar-item {
    display: block;
    padding: 0.5rem 1.25rem;
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--text-dim);
    text-decoration: none;
    cursor: pointer;
    border-left: 2px solid transparent;
    transition: color 0.15s, background 0.15s, border-color 0.15s;
}

.sidebar-item:hover {
    color: var(--text-muted);
}

.sidebar-item.active {
    color: var(--teal);
    font-weight: 600;
}

/* ── Main Column ─────────────────────────────────────── */
.main {
    flex: 1;
    min-width: 0;
}

.main-inner {
    max-width: 1100px;
    width: 100%;
    padding: 0 2rem 2rem;
}

/* ── Hero ────────────────────────────────────────────── */
.hero {
    position: relative;
    padding: 2rem 0 2.5rem;
}

.hero-badge {
    display: inline-block;
    padding: 1px;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--teal), var(--blue));
    margin-bottom: 1rem;
}

.hero-badge span {
    display: inline-block;
    padding: 0.35rem 1rem;
    border-radius: 999px;
    background: var(--bg-opaque);
    color: var(--teal);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

.hero h1 {
    font-size: clamp(1.8rem, 3.5vw, 3.0rem);
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.hero .accent {
    color: var(--teal);
}

.hero-sub {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 620px;
    line-height: 1.6;
}

/* ── Filters ─────────────────────────────────────────── */
.filters-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    padding: 1rem 0;
    top: 0;
    z-index: 10;
}

.filter-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-dim);
    margin-bottom: 0.25rem;
}

.btn-group {
    display: flex;
}

.btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 1rem;
    font-weight: 400;
    padding: 0.45rem 1rem;
    cursor: pointer;
    transition: all 0.15s;
}

.btn:first-child {
    border-radius: 6px 0 0 6px;
}

.btn:last-child {
    border-radius: 0 6px 6px 0;
}

.btn:not(:first-child) {
    margin-left: -1px;
}

.btn:hover {
    color: var(--text);
    background: var(--btn-hover-bg);
}

.btn.active {
    background: var(--btn-active-bg);
    color: var(--teal);
    border-color: var(--btn-active-border);
    font-weight: 600;
    z-index: 1;
    position: relative;
}

/* ── Chart ───────────────────────────────────────────── */
.chart-block {
    margin: 1.5rem 0;
}

.chart-heading {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.25rem;
}

.chart-subtitle {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.chart-wrap {
    height: 340px;
}

/* ── Tables ──────────────────────────────────────────── */
.table-card {
    margin: 1.5rem 0 2rem;
}

.table-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
}

.table-scroll {
    overflow-x: auto;
    scrollbar-color: var(--text-dim) var(--border);
    scrollbar-width: thin;
}

.table-scroll::-webkit-scrollbar {
    height: 8px;
}

.table-scroll::-webkit-scrollbar-track {
    background: var(--border);
    border-radius: 4px;
}

.table-scroll::-webkit-scrollbar-thumb {
    background: var(--text-dim);
    border-radius: 4px;
}

.table-scroll::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 1rem;
}

thead th {
    text-align: left;
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-dim);
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

tbody td {
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--row-border);
    white-space: nowrap;
    color: var(--text-muted);
}

tbody tr:last-child td {
    border-bottom: 1px solid var(--border);
}

tbody tr:hover {
    background: var(--row-hover-bg);
}

.model-cell {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
    color: var(--text);
}

.model-cell a {
    color: var(--teal);
    text-decoration: none;
    transition: color 0.15s;
}

.model-cell a:hover {
    text-decoration: underline;
}

.model-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

th.first-metric, td.first-metric {
    padding-left: 2.5rem;
}

.oom {
    color: var(--red);
    font-weight: 600;
}

tbody tr.row-group-break td {
    border-top: 2px solid var(--border);
}

/* ── Legend ───────────────────────────────────────────── */
.legend-section {
    margin: 2rem 0;
    padding-top: 1.5rem;
}

.legend-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.25rem;
    font-size: 0.8rem;
    color: var(--text-dim);
}

.legend-grid strong {
    color: var(--text-muted);
    font-weight: 500;
}

.experiment-setup {
    margin-top: 0.75rem;
    font-size: 0.95rem;
    color: var(--text-dim);
    font-style: italic;
    line-height: 1.6;
}

.experiment-setup p {
    margin-bottom: 0.25rem;
}

/* ── Footer ──────────────────────────────────────────── */
.footer {
    padding: 2.5rem 0;
    margin-top: 2rem;
}

.footer-inner {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 2rem;
}

.footer-grid {
    display: flex;
    gap: 3rem;
    flex-wrap: wrap;
}

.footer-col {
    font-size: 1rem;
    color: var(--text-dim);
    line-height: 1.7;
}

.footer-col p {
    margin: 0;
}

.footer-col-title {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text);
}

.footer-logo-img {
    display: block;
    margin-bottom: 0.5rem;
}

.footer-logo {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 1.2rem;
}

.footer-logo a {
    color: var(--text-muted);
    text-decoration: none;
}

.footer-logo a:hover {
    text-decoration: underline;
}

.footer-social {
    display: flex;
    gap: 0.75rem;
}

.footer-social a {
    color: var(--text-dim);
    transition: color 0.15s;
    display: flex;
    align-items: center;
}

.footer-social a:hover {
    color: var(--teal);
}

/* ── Responsive ──────────────────────────────────────── */
@media (max-width: 768px) {
    .page {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        max-width: none;
        height: auto;
        position: static;
        border-right: none;
        border-bottom: 1px solid var(--border);
        padding: 0.75rem 0;
    }

    .sidebar-nav {
        flex-direction: row;
        flex-wrap: wrap;
        padding: 0 0.75rem;
    }

    .sidebar-item {
        border-left: none;
        border-bottom: 2px solid transparent;
        padding: 0.4rem 0.75rem;
        font-size: 0.9rem;
    }

    .sidebar-item.active {
        border-left-color: transparent;
        border-bottom-color: var(--teal);
    }

    .main-inner {
        padding: 0 1rem 2rem;
    }

    .filters-bar {
        gap: 0.75rem;
    }

    .btn {
        font-size: 0.85rem;
        padding: 0.35rem 0.7rem;
    }

    .chart-wrap {
        height: 260px;
    }
}