:root {
    --flood-accent:#dc2626;
    --flood-accent-dark:#991b1b;
    --flood-orange:#f97316;
    --flood-soft:#fee2e2;
    --flood-blue:#2563eb;
    --flood-gold:#b45309;
}

.page-floodfreq .wrap {
    max-width:1180px;
    margin:0 auto;
    padding:34px 28px 64px;
}

.page-floodfreq .hero {
    color:#fff;
    margin:0 0 28px;
    text-shadow:0 2px 14px rgba(0,0,0,.48);
}

.page-floodfreq .hero h1 {
    font-size:clamp(42px, 6vw, 64px);
    font-weight:950;
    letter-spacing:-.055em;
    line-height:.95;
    margin:0 0 8px;
}

.page-floodfreq .hero p {
    margin:0;
    color:rgba(255,255,255,.86);
    font-size:16px;
}

.page-floodfreq .ff-card {
    background:linear-gradient(180deg, rgba(255,255,255,.95), rgba(255,255,255,.86));
    border:1px solid rgba(255,255,255,.50);
    border-radius:26px;
    box-shadow:0 22px 60px rgba(0,0,0,.24);
    padding:24px;
    margin-bottom:18px;
    backdrop-filter:blur(18px) saturate(145%);
    -webkit-backdrop-filter:blur(18px) saturate(145%);
}

.page-floodfreq .intro-card {
    display:grid;
    grid-template-columns:minmax(260px,.82fr) 1.4fr;
    gap:24px;
    align-items:stretch;
    border-top:5px solid var(--flood-accent);
}

.page-floodfreq .eyebrow {
    display:inline-flex;
    align-items:center;
    border-radius:999px;
    background:#fee2e2;
    color:#991b1b;
    font-size:11px;
    font-weight:950;
    letter-spacing:.09em;
    text-transform:uppercase;
    padding:6px 10px;
    margin-bottom:12px;
}

.page-floodfreq .intro-copy h2 {
    font-size:clamp(28px, 4vw, 42px);
    font-weight:950;
    letter-spacing:-.055em;
    line-height:1;
    color:#0f172a;
    margin:0 0 10px;
}

.page-floodfreq .intro-copy p {
    color:#475569;
    line-height:1.65;
    font-size:14px;
}

.page-floodfreq .plain-grid {
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:12px;
}

.page-floodfreq .plain-card {
    position:relative;
    overflow:hidden;
    background:#fff;
    border:1px solid rgba(15,23,42,.08);
    border-radius:20px;
    padding:18px;
    box-shadow:0 12px 28px rgba(15,23,42,.08);
}

.page-floodfreq .plain-card::before {
    content:"";
    position:absolute;
    inset:0 0 auto 0;
    height:5px;
    background:var(--tone,#64748b);
}

.page-floodfreq .plain-card.gold { --tone:#b45309; }
.page-floodfreq .plain-card.orange { --tone:#f97316; }
.page-floodfreq .plain-card.red { --tone:#dc2626; }
.page-floodfreq .plain-card.blue { --tone:#2563eb; }

.page-floodfreq .plain-label {
    color:#64748b;
    font-size:11px;
    font-weight:950;
    letter-spacing:.08em;
    text-transform:uppercase;
    margin-bottom:8px;
}

.page-floodfreq .plain-value {
    font-size:clamp(25px, 3vw, 34px);
    font-weight:950;
    letter-spacing:-.045em;
    line-height:1;
    color:#0f172a;
}

.page-floodfreq .plain-detail {
    color:#64748b;
    font-size:12.5px;
    line-height:1.45;
    margin-top:8px;
}

.page-floodfreq .card-title {
    font-size:26px;
    font-weight:950;
    letter-spacing:-.04em;
    margin:0 0 5px;
    color:#0f172a;
}

.page-floodfreq .card-subtitle {
    font-size:13.5px;
    color:#64748b;
    margin-bottom:18px;
    line-height:1.6;
    max-width:880px;
}

.page-floodfreq .lookup-card {
    display:grid;
    grid-template-columns:1fr auto;
    gap:20px;
    align-items:center;
}

.page-floodfreq .lookup-panel {
    min-width:min(440px, 100%);
}

.page-floodfreq .lookup-row {
    display:flex;
    align-items:center;
    gap:10px;
    flex-wrap:wrap;
}

.page-floodfreq .lookup-row input {
    border:1px solid rgba(15,23,42,.14);
    border-radius:14px;
    padding:12px 15px;
    font-size:16px;
    font-weight:850;
    width:150px;
    color:#0f172a;
    background:rgba(255,255,255,.86);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.85);
}

.page-floodfreq .lookup-unit {
    color:#64748b;
    font-size:14px;
    font-weight:800;
}

.page-floodfreq .lookup-row button {
    border:0;
    border-radius:14px;
    padding:12px 18px;
    background:linear-gradient(135deg,var(--flood-accent),var(--flood-accent-dark));
    color:white;
    font-weight:900;
    font-size:14px;
    cursor:pointer;
    box-shadow:0 12px 24px rgba(220,38,38,.20);
    transition:transform .18s ease, box-shadow .18s ease;
}

.page-floodfreq .lookup-row button:hover {
    transform:translateY(-1px);
    box-shadow:0 16px 30px rgba(220,38,38,.26);
}

.page-floodfreq .lookup-result {
    background:#f0fdf4;
    border:1px solid #86efac;
    border-radius:18px;
    padding:16px 18px;
    margin-top:14px;
    display:none;
}

.page-floodfreq .lookup-result.visible { display:block; }

.page-floodfreq .lookup-result-value {
    font-size:30px;
    font-weight:950;
    letter-spacing:-.045em;
    color:#166534;
    line-height:1;
}

.page-floodfreq .lookup-result-detail {
    font-size:13.5px;
    color:#166534;
    margin-top:7px;
    line-height:1.5;
}

.page-floodfreq .rp-grid {
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(170px,1fr));
    gap:12px;
}

.page-floodfreq .rp-cell {
    background:#fff;
    border:1px solid rgba(15,23,42,.08);
    border-radius:18px;
    padding:17px 15px;
    text-align:center;
    box-shadow:0 10px 24px rgba(15,23,42,.07);
}

.page-floodfreq .rp-cell.highlight {
    background:linear-gradient(180deg,#fff7ed,#ffedd5);
    border-color:#fdba74;
}

.page-floodfreq .rp-period {
    font-size:12px;
    font-weight:950;
    color:#64748b;
    text-transform:uppercase;
    letter-spacing:.08em;
    margin-bottom:8px;
}

.page-floodfreq .rp-cfs {
    font-size:30px;
    font-weight:950;
    letter-spacing:-.045em;
    line-height:1;
    color:#0f172a;
}

.page-floodfreq .rp-unit {
    font-size:12px;
    font-weight:900;
    color:#94a3b8;
    margin-top:2px;
}

.page-floodfreq .rp-aep {
    font-size:12px;
    color:#64748b;
    line-height:1.4;
    margin-top:8px;
}

.page-floodfreq .caveat {
    background:#fffbeb;
    border:1px solid #fde68a;
    border-radius:16px;
    padding:14px 16px;
    font-size:13px;
    color:#92400e;
    line-height:1.6;
    margin-top:16px;
}

.page-floodfreq .chart-wrap {
    height:410px;
    margin:0 -6px;
}

.page-floodfreq .table-scroll {
    overflow-x:auto;
    border-radius:18px;
    border:1px solid rgba(15,23,42,.08);
}

.page-floodfreq .peaks-table {
    width:100%;
    border-collapse:collapse;
    font-size:14px;
    background:rgba(255,255,255,.72);
}

.page-floodfreq .peaks-table th {
    text-align:left;
    padding:11px 14px;
    border-bottom:2px solid rgba(226,232,240,.9);
    color:#64748b;
    font-size:12px;
    font-weight:900;
    text-transform:uppercase;
    letter-spacing:.06em;
    white-space:nowrap;
    background:#f8fafc;
}

.page-floodfreq .peaks-table td {
    padding:12px 14px;
    border-bottom:1px solid rgba(226,232,240,.82);
    white-space:nowrap;
}

.page-floodfreq .peaks-table tbody tr:last-child td { border-bottom:none; }
.page-floodfreq .peaks-table tbody tr:hover { background:#fff7ed; }
.page-floodfreq .peaks-table .rank1 td { font-weight:900; background:#fffbeb; }

.page-floodfreq .rank-badge {
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:28px;
    height:28px;
    border-radius:999px;
    font-size:12px;
    font-weight:950;
    background:#fee2e2;
    color:#991b1b;
}

.page-floodfreq .table-note {
    margin-top:12px;
    font-size:12px;
    color:#64748b;
    line-height:1.5;
}

.page-floodfreq .freq-grid {
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(190px,1fr));
    gap:12px;
}

.page-floodfreq .freq-cell {
    background:#fff;
    border:1px solid rgba(15,23,42,.08);
    border-radius:18px;
    padding:18px;
    box-shadow:0 10px 24px rgba(15,23,42,.07);
}

.page-floodfreq .freq-thresh {
    font-size:12px;
    font-weight:950;
    text-transform:uppercase;
    letter-spacing:.07em;
    color:#64748b;
    margin-bottom:9px;
}

.page-floodfreq .freq-number {
    font-size:38px;
    font-weight:950;
    letter-spacing:-.05em;
    line-height:1;
    color:#0f172a;
}

.page-floodfreq .freq-unit,
.page-floodfreq .freq-meta {
    font-size:12.5px;
    color:#64748b;
    margin-top:5px;
    line-height:1.4;
}

.page-floodfreq .freq-years {
    display:flex;
    flex-direction:column;
    gap:4px;
    margin-top:12px;
    font-size:12px;
    color:#475569;
    line-height:1.4;
}

.page-floodfreq .freq-years span {
    display:inline-flex;
    width:max-content;
    max-width:100%;
    background:#f8fafc;
    border:1px solid #e2e8f0;
    border-radius:999px;
    padding:4px 9px;
}

.page-floodfreq .method-card {
    background:linear-gradient(180deg, rgba(248,250,252,.95), rgba(241,245,249,.90));
}

.page-floodfreq .method-grid {
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(160px,1fr));
    gap:12px;
    margin-top:14px;
}

.page-floodfreq .method-grid div {
    background:#fff;
    border:1px solid rgba(15,23,42,.08);
    border-radius:16px;
    padding:14px 16px;
}

.page-floodfreq .method-grid span {
    display:block;
    font-size:11px;
    font-weight:950;
    color:#64748b;
    text-transform:uppercase;
    letter-spacing:.07em;
    margin-bottom:6px;
}

.page-floodfreq .method-grid strong {
    font-size:20px;
    font-weight:950;
    color:#0f172a;
}

.page-floodfreq .loading {
    text-align:center;
    padding:52px;
    color:#64748b;
    background:rgba(255,255,255,.88);
    border-radius:24px;
}

.page-floodfreq .error-text {
    color:#991b1b;
    font-weight:800;
}

.page-floodfreq .source {
    margin-top:14px;
    color:rgba(255,255,255,.75);
    font-size:13px;
}

.page-floodfreq .source a { color:white; }

@media (max-width:850px) {
    .page-floodfreq .intro-card,
    .page-floodfreq .lookup-card {
        grid-template-columns:1fr;
    }
}

@media (max-width:700px) {
    .page-floodfreq .wrap {
        padding:24px 16px 48px;
    }

    .page-floodfreq .hero h1 {
        font-size:38px;
    }

    .page-floodfreq .plain-grid {
        grid-template-columns:1fr;
    }

    .page-floodfreq .ff-card {
        padding:18px;
        border-radius:22px;
    }

    .page-floodfreq .lookup-row input {
        width:100%;
        flex:1 1 100%;
    }

    .page-floodfreq .lookup-row button {
        flex:1;
    }

    .page-floodfreq .chart-wrap {
        height:320px;
    }
}