/* ═══════════════════════════════════════════════════════════════
   iit.itriia.com — IIT Validation page (S54)
   Palette ITRIIA bleu nuit majestueux #1D4ED8
   ═══════════════════════════════════════════════════════════════ */

:root {
    --bg: #0a0e1a;
    --bg-card: #111729;
    --bg-card-hover: #18213a;
    --border: #1f2a44;
    --accent: #1D4ED8;
    --accent-light: #3b82f6;
    --accent-glow: rgba(29, 78, 216, 0.18);
    --text: #e8ecf5;
    --text-muted: #8b95a8;
    --text-faint: #5a657a;
    --ok: #4ade80;
    --warn: #fbbf24;
    --bad: #f87171;
    --serif: 'Georgia', 'Times New Roman', serif;
    --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', sans-serif;
    --mono: 'SF Mono', 'Menlo', 'Consolas', monospace;
    --maxw: 1080px;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--sans);
    font-size: 16px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

a {
    color: var(--accent-light);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 120ms ease;
}
a:hover { border-bottom-color: var(--accent-light); }

h1, h2, h3 {
    font-family: var(--serif);
    font-weight: 600;
    letter-spacing: -0.01em;
    line-height: 1.25;
    margin: 0 0 0.5em;
}
h1 { font-size: 2.4rem; }
h2 { font-size: 1.7rem; }
h3 { font-size: 1.1rem; font-family: var(--sans); font-weight: 600; }

em { color: var(--accent-light); font-style: italic; }
strong { color: #fff; font-weight: 600; }
code { font-family: var(--mono); font-size: 0.92em; background: rgba(29,78,216,0.10); padding: 1px 6px; border-radius: 3px; color: #cfd8ee; }

.wrap {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 28px;
}

/* ─── Header ─── */
.page-header {
    border-bottom: 1px solid var(--border);
    padding: 18px 0;
    background: rgba(10, 14, 26, 0.85);
    backdrop-filter: blur(8px);
    position: sticky;
    top: 0;
    z-index: 10;
}
.page-header .wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
}
.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    letter-spacing: 0.02em;
}
.brand-mark {
    width: 14px;
    height: 14px;
    background: var(--accent);
    box-shadow: 0 0 16px var(--accent-glow);
    border-radius: 2px;
    transform: rotate(45deg);
}
.brand-text { font-size: 0.95rem; }

.page-nav {
    display: flex;
    gap: 22px;
    font-size: 0.92rem;
}
.page-nav a {
    color: var(--text-muted);
    border-bottom: none;
}
.page-nav a:hover { color: var(--text); }

/* ─── Hero ─── */
.hero {
    padding: 64px 0 32px;
}
.kicker {
    color: var(--accent-light);
    font-size: 0.82rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin: 0 0 18px;
}
.hero h1 {
    max-width: 880px;
    font-size: 2.6rem;
    margin-bottom: 22px;
}
.hero .lede {
    font-size: 1.15rem;
    max-width: 760px;
    color: var(--text);
    margin: 0 0 14px;
}
.hero .rho {
    font-family: var(--serif);
    font-size: 1.2em;
    color: var(--accent-light);
}
.hero-meta {
    color: var(--text-muted);
    font-size: 0.92rem;
    margin: 22px 0 0;
}

/* ─── Verdict card ─── */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 32px;
    margin: 32px 0;
}
.verdict-card {
    border-color: var(--accent);
    box-shadow: 0 0 40px var(--accent-glow);
}
.verdict-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.verdict-cell {
    text-align: center;
}
.verdict-num {
    font-family: var(--serif);
    font-size: 2.4rem;
    font-weight: 600;
    color: var(--accent-light);
    line-height: 1.05;
    margin-bottom: 6px;
}
.verdict-num.verdict-ok { color: var(--ok); }
.verdict-lbl {
    font-size: 0.82rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}
.verdict-foot {
    border-top: 1px solid var(--border);
    margin: 28px -32px -8px;
    padding: 20px 32px 0;
    color: var(--text-muted);
    font-size: 0.95rem;
    text-align: center;
}

/* ─── Block ─── */
.block {
    padding: 56px 0;
    border-top: 1px solid var(--border);
}
.block-header {
    margin-bottom: 32px;
}
.block-header h2 { margin-bottom: 8px; }
.block-header p {
    color: var(--text-muted);
    margin: 0;
    font-size: 1rem;
}
.block-note {
    margin: 28px 0 0;
    padding: 16px 20px;
    background: rgba(29,78,216,0.06);
    border-left: 3px solid var(--accent);
    color: var(--text-muted);
    font-size: 0.95rem;
    border-radius: 0 4px 4px 0;
}

/* ─── Rank table ─── */
.rank-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    font-size: 0.96rem;
}
.rank-table th, .rank-table td {
    padding: 14px 18px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}
.rank-table thead th {
    background: rgba(29,78,216,0.08);
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.rank-table tbody tr:last-child td { border-bottom: none; }
.rank-table tbody tr:hover { background: var(--bg-card-hover); }
.rank-table .col-rank, .rank-table .col-num { text-align: right; font-variant-numeric: tabular-nums; }
.rank-table .col-rank { width: 50px; }
.rank-table .col-num { width: 130px; }
.rank-table .row-top { color: var(--ok); font-weight: 600; }
.rank-table .row-bottom { color: var(--text-muted); }
.rank-table .delta-pos { color: var(--warn); }
.rank-table .delta-neg { color: var(--accent-light); }
.rank-table .delta-zero { color: var(--ok); }
.rank-table .model-id {
    display: block;
    font-size: 0.78rem;
    color: var(--text-faint);
    font-family: var(--mono);
    margin-top: 2px;
}

/* ─── Question grid ─── */
.qgrid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 14px;
}
.qcard {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-left: 3px solid var(--ok);
    border-radius: 4px;
    padding: 16px 18px;
    font-size: 0.92rem;
    transition: background 120ms ease;
}
.qcard:hover { background: var(--bg-card-hover); }
.qcard.warn { border-left-color: var(--warn); }
.qcard-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 8px;
}
.qcard-id {
    font-family: var(--serif);
    font-weight: 600;
    color: var(--text);
    font-size: 1.05rem;
}
.qcard-rho {
    font-family: var(--mono);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--ok);
}
.qcard.warn .qcard-rho { color: var(--warn); }
.qcard-meta {
    font-size: 0.78rem;
    color: var(--text-faint);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.qcard-text {
    color: var(--text-muted);
    line-height: 1.5;
    font-size: 0.88rem;
}
.qcard-n {
    margin-top: 10px;
    font-size: 0.78rem;
    color: var(--text-faint);
}

/* ─── Method grid ─── */
.method-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}
.method-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 24px 26px;
}
.method-card h3 {
    color: var(--accent-light);
    margin-bottom: 12px;
}
.method-card p {
    margin: 0 0 12px;
    color: var(--text);
}
.method-card p:last-child { margin-bottom: 0; }

/* ─── Warn block ─── */
.block-warn .warn-card {
    background: rgba(251,191,36,0.05);
    border: 1px solid rgba(251,191,36,0.25);
    border-radius: 6px;
    padding: 24px 28px;
}
.warn-card h3 { color: var(--warn); margin-bottom: 14px; }
.kimi-list {
    margin: 12px 0 18px;
    padding: 14px 18px 14px 36px;
    background: rgba(0,0,0,0.25);
    border-radius: 4px;
    font-size: 0.95rem;
}
.kimi-list li { margin: 4px 0; color: var(--text-muted); }
.kimi-list strong { color: var(--warn); }
.kimi-conclusion {
    margin: 0;
    padding-top: 12px;
    border-top: 1px solid rgba(251,191,36,0.15);
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* ─── Sources ─── */
.src-list {
    list-style: none;
    padding: 0;
    margin: 0;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 6px;
    overflow: hidden;
}
.src-list li {
    padding: 16px 22px;
    border-bottom: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.94rem;
}
.src-list li:last-child { border-bottom: none; }
.src-list strong { color: var(--text); }

/* ─── Footer ─── */
.page-footer {
    border-top: 1px solid var(--border);
    margin-top: 80px;
    padding: 32px 0 48px;
    color: var(--text-faint);
    font-size: 0.85rem;
}
.page-footer p { margin: 4px 0; }
.foot-mention {
    color: var(--text-faint);
    font-style: italic;
    font-size: 0.82rem;
    max-width: 720px;
}

/* ─── Responsive ─── */
@media (max-width: 720px) {
    h1 { font-size: 1.9rem !important; }
    h2 { font-size: 1.4rem; }
    .hero { padding: 40px 0 24px; }
    .hero h1 { font-size: 1.9rem; }
    .hero .lede { font-size: 1.04rem; }
    .verdict-grid { grid-template-columns: repeat(2, 1fr); gap: 18px; }
    .verdict-num { font-size: 1.9rem; }
    .method-grid { grid-template-columns: 1fr; }
    .page-nav { display: none; }
    .qgrid { grid-template-columns: 1fr; }
    .rank-table { font-size: 0.86rem; }
    .rank-table th, .rank-table td { padding: 10px 12px; }
    .rank-table .col-num { width: auto; }
    .rank-table .model-id { font-size: 0.72rem; }
    .wrap { padding: 0 20px; }
    .card { padding: 22px 18px; }
    .verdict-foot { margin: 22px -18px -8px; padding: 16px 18px 0; }
}