*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --ndu-royal: #0a3357;
    --ndu-orchid: #1c6bb0;
    --ndu-rose: #4fb0e6;
    --ndu-ink: #10202b;
    --ndu-mute: #5c6f7d;
    --ndu-edge: #d7e4ee;
    --ndu-paper: #f7fbfe;
    --ndu-tint: #e8f2f9;
    --ndu-panel: #ffffff;
    --ndu-night: #071c2e;
    --ndu-ui: "Trebuchet MS", "Segoe UI", Arial, sans-serif;
    --ndu-head: "Palatino Linotype", Georgia, "Times New Roman", serif;
    --ndu-b1: 7px;
    --ndu-b2: 20px;
    --ndu-b3: 30px;
    --ndu-glow1: 0 9px 22px rgba(16, 32, 43, .06);
    --ndu-glow2: 0 17px 42px rgba(16, 32, 43, .10);
    --ndu-glow3: 0 26px 60px rgba(16, 32, 43, .14);
}

html { scroll-behavior: smooth; }

body {
    font-family: var(--ndu-head);
    background:
        radial-gradient(circle at 12% 0%, rgba(28, 107, 176, .10), transparent 32%),
        linear-gradient(180deg, #f7fbfe 0%, #e8f2f9 100%);
    color: var(--ndu-ink);
    line-height: 1.72;
    font-size: 16px;
}

a {
    color: var(--ndu-royal);
    text-decoration: none;
    transition: color .2s ease, opacity .2s ease;
}
a:hover { color: var(--ndu-orchid); }

.nduCrest {
    position: sticky;
    top: 0;
    z-index: 20;
    padding: 18px 20px;
    background: rgba(247, 251, 254, .90);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(10, 51, 87, .13);
}
.nduCrest__inner {
    max-width: 1160px;
    margin: 0 auto;
    text-align: center;
}
.nduCrest__name {
    font-family: var(--ndu-ui);
    font-size: 21px;
    letter-spacing: .18em;
    text-transform: uppercase;
    font-weight: 900;
    color: var(--ndu-royal);
}

.nduSpring {
    padding: 78px 20px 52px;
    text-align: center;
    color: var(--ndu-ink);
}
.nduSpring__tag {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 7px 16px;
    border-radius: 999px;
    border: 1px solid rgba(10, 51, 87, .15);
    background: rgba(255, 255, 255, .74);
    box-shadow: var(--ndu-glow1);
    font-family: var(--ndu-ui);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--ndu-orchid);
    margin-bottom: 18px;
}
.nduSpring__title {
    max-width: 820px;
    margin: 0 auto 14px;
    font-size: clamp(30px, 5vw, 54px);
    line-height: 1.08;
    color: var(--ndu-royal);
}
.nduSpring__sub {
    max-width: 640px;
    margin: 0 auto;
    color: var(--ndu-mute);
    font-size: 17px;
    line-height: 1.78;
}

.nduMarsh {
    max-width: 980px;
    margin: 0 auto;
    padding: 0 20px 88px;
}
.nduFoam {
    background: linear-gradient(180deg, rgba(255,255,255,.95) 0%, rgba(247,251,254,.98) 100%);
    border: 1px solid rgba(10, 51, 87, .11);
    border-radius: var(--ndu-b3);
    box-shadow: var(--ndu-glow2);
    padding: 52px 56px;
}
@media (max-width: 740px) {
    .nduFoam { padding: 30px 22px; border-radius: 22px; }
    .nduSpring { padding-top: 60px; }
}

.nduFoam h2 {
    font-size: clamp(22px, 3vw, 32px);
    line-height: 1.18;
    color: var(--ndu-royal);
    margin: 34px 0 14px;
}
.nduFoam h2:first-child { margin-top: 0; }
.nduFoam h3 {
    font-size: 19px;
    line-height: 1.28;
    color: var(--ndu-ink);
    margin: 24px 0 10px;
}
.nduFoam p {
    color: var(--ndu-mute);
    margin-bottom: 15px;
}
.nduFoam ul,
.nduFoam ol {
    padding-left: 20px;
    margin: 0 0 16px;
    color: var(--ndu-mute);
}
.nduFoam li { margin-bottom: 7px; }
.nduFoam strong { color: var(--ndu-ink); }

.nduReefGrid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
    gap: 18px;
    margin: 26px 0;
}
.nduReef {
    background: linear-gradient(180deg, rgba(255,255,255,.93), rgba(232,242,249,.98));
    border: 1px solid rgba(10, 51, 87, .10);
    border-radius: var(--ndu-b2);
    padding: 24px 20px;
    box-shadow: var(--ndu-glow1);
}
.nduReef__title {
    font-family: var(--ndu-ui);
    font-size: 15px;
    font-weight: 900;
    color: var(--ndu-royal);
    margin-bottom: 6px;
}
.nduReef__body {
    font-size: 14px;
    line-height: 1.68;
    color: var(--ndu-mute);
}

.nduEddy {
    margin: 26px 0;
    padding: 22px 24px;
    border-radius: var(--ndu-b2);
    background: linear-gradient(135deg, rgba(79, 176, 230, .18), rgba(255, 255, 255, .96));
    border: 1px solid rgba(79, 176, 230, .34);
    box-shadow: var(--ndu-glow1);
}
.nduEddy p { margin: 0; color: var(--ndu-ink); }

.nduSwell {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0 26px;
    overflow: hidden;
    border-radius: 15px;
    box-shadow: var(--ndu-glow1);
    background: var(--ndu-panel);
}
.nduSwell th {
    background: linear-gradient(135deg, var(--ndu-royal), var(--ndu-orchid));
    color: #fff;
    text-align: left;
    padding: 14px 16px;
    font-family: var(--ndu-ui);
    font-size: 14px;
    letter-spacing: .02em;
}
.nduSwell td {
    padding: 13px 16px;
    border-bottom: 1px solid rgba(10, 51, 87, .09);
    color: var(--ndu-mute);
    background: rgba(255,255,255,.88);
}
.nduSwell tr:nth-child(even) td { background: rgba(232,242,249,.78); }
.nduSwell tr:last-child td { border-bottom: none; }

.nduRapids {
    margin: 28px 0;
    display: grid;
    gap: 18px;
}
.nduRapidsStep {
    display: grid;
    grid-template-columns: 52px 1fr;
    gap: 16px;
    align-items: start;
    padding: 20px 20px 18px;
    background: rgba(255,255,255,.84);
    border: 1px solid rgba(10, 51, 87, .09);
    border-radius: var(--ndu-b2);
    box-shadow: var(--ndu-glow1);
}
.nduRapidsStep__num {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-family: var(--ndu-ui);
    font-size: 18px;
    font-weight: 900;
    color: #fff;
    background: linear-gradient(135deg, var(--ndu-royal), var(--ndu-orchid));
}
.nduRapidsStep__title {
    font-family: var(--ndu-ui);
    font-size: 15px;
    font-weight: 900;
    color: var(--ndu-ink);
    margin-bottom: 4px;
}
.nduRapidsStep__text {
    font-size: 15px;
    color: var(--ndu-mute);
}

.nduBrook {
    margin-top: 40px;
    background: #eef5fb;
    color: #6a8194;
    padding: 20px 20px 16px;
    text-align: center;
    border-top: 1px solid #d7e4ee;
    font-family: var(--ndu-ui);
}
.nduBrook__inner {
    max-width: 900px;
    margin: 0 auto;
}
.nduBrook__nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px 20px;
    margin-bottom: 10px;
}
.nduBrook__nav a {
    color: #7d94a4;
    font-size: 11px;
    text-decoration: none;
}
.nduBrook__nav a:hover { color: #274b63; }
.nduBrook__note {
    font-size: 11px;
    color: #8399a8;
}
.nduBrook__fine {
    margin: 10px auto 0;
    max-width: 760px;
    font-size: 11px;
    line-height: 1.65;
    color: #8399a8;
}