:root {
    --bg: #f4f6f8;
    --panel: #ffffff;
    --ink: #17202a;
    --muted: #5c6b7a;
    --line: #d8dee6;
    --accent: #144b7d;
    --accent-soft: #eaf3fb;
    --warn: #9a6700;
    --warn-bg: #fff7df;
    --error: #9b1c1c;
    --error-bg: #fdecec;
    --ok-bg: #edf7f0;
    --shadow: 0 16px 36px rgba(23, 32, 42, 0.08);
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: var(--ink);
    background: linear-gradient(180deg, #eef3f7 0%, var(--bg) 100%);
}

.shell {
    max-width: 1180px;
    margin: 0 auto;
    padding: 24px;
}

.site-header,
.hero,
.card {
    background: var(--panel);
    border: 1px solid rgba(216, 222, 230, 0.9);
    border-radius: 20px;
    box-shadow: var(--shadow);
}

.site-header {
    padding: 24px;
    display: flex;
    justify-content: space-between;
    gap: 20px;
    align-items: flex-start;
}

.eyebrow,
.section-kicker {
    margin: 0 0 8px;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.75rem;
    color: var(--accent);
    font-weight: 700;
}

h1, h2, h3, h4 { margin-top: 0; }
h1 { margin-bottom: 8px; }
.lede, .muted, .site-footer, .prose p, .prose li { color: var(--muted); }

.site-nav {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.site-nav a,
button {
    text-decoration: none;
    border-radius: 999px;
    padding: 11px 16px;
    font-weight: 700;
    transition: 0.2s ease;
}

.site-nav a {
    color: var(--accent);
    background: var(--accent-soft);
}
.site-nav a.active,
.site-nav a:hover,
button {
    background: var(--accent);
    color: #fff;
}

button { border: 0; cursor: pointer; }
button:hover { transform: translateY(-1px); }

.layout { margin-top: 24px; display: grid; gap: 24px; }
.single-column { max-width: 860px; }
.hero {
    padding: 28px;
    display: grid;
    grid-template-columns: 1.6fr 1fr;
    gap: 24px;
}
.hero-points,
.prose ul,
.prose ol,
.content-block ul,
.content-block ol { margin: 0; padding-left: 20px; }
.grid {
    display: grid;
    grid-template-columns: minmax(320px, 460px) minmax(0, 1fr);
    gap: 24px;
}
.card { padding: 24px; }
.field-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}
label, fieldset { display: block; margin-bottom: 16px; }
label span, legend {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}
input, textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 12px 14px;
    font: inherit;
    color: var(--ink);
    background: #fff;
}
fieldset {
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 16px;
}
.checkbox {
    display: flex;
    gap: 12px;
    align-items: flex-start;
}
.checkbox input {
    width: auto;
    margin-top: 4px;
}
.checkbox span { margin-bottom: 0; font-weight: 500; }
.alert {
    border-radius: 14px;
    padding: 14px 16px;
    margin-bottom: 18px;
    font-weight: 600;
}
.alert.error { background: var(--error-bg); color: var(--error); }
.alert.warning { background: var(--warn-bg); color: var(--warn); }
.stat-row {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}
.stat {
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 18px;
    background: #fbfcfe;
}
.stat.moderate { background: var(--warn-bg); }
.stat.high { background: #fdeeee; }
.stat-label {
    display: block;
    margin-bottom: 8px;
    color: var(--muted);
    font-size: 0.86rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}
.stat strong { font-size: 1.4rem; }
.content-block { margin-top: 22px; }
.output-box { background: #f8fafc; }
.two-col {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
}
.site-footer {
    padding: 22px 8px 12px;
    font-size: 0.94rem;
}

@media (max-width: 900px) {
    .hero,
    .grid,
    .stat-row,
    .two-col,
    .field-grid,
    .site-header {
        grid-template-columns: 1fr;
        display: grid;
    }

    .site-nav { margin-top: 8px; }
}