:root {
    --site-shell-max-width: 1100px;
    --site-page-gutter: clamp(12px, 2.4vw, 22px);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Segoe UI', Arial, sans-serif;
    background: #f8fafc;
    color: #1f2937;
}

main {
    max-width: var(--site-shell-max-width);
    margin: 0 auto;
    padding: 32px var(--site-page-gutter) 56px;
}

h1 {
    margin: 0 0 12px;
    font-size: 32px;
    color: #0f172a;
}

h2 {
    margin-top: 28px;
    color: #1d4ed8;
}

p,
li {
    line-height: 1.6;
}

a {
    color: #2563eb;
}

a:hover {
    text-decoration: underline;
}

.card {
    background: #fff;
    border: 1px solid #dbeafe;
    border-radius: 14px;
    padding: 18px 20px;
    margin: 18px 0;
}

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 14px;
}

.btn {
    display: inline-block;
    background: #2563eb;
    color: #fff;
    text-decoration: none;
    padding: 10px 14px;
    border-radius: 8px;
    font-weight: 600;
}

.muted {
    color: #475569;
}

.related-list {
    margin: 12px 0 0 18px;
}

.top-links {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 14px;
}

.cluster-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 10px;
    margin-top: 10px;
}

.cluster-grid a {
    display: block;
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    border-radius: 8px;
    padding: 10px 12px;
    text-decoration: none;
    color: #1e3a8a;
    font-weight: 600;
}

.cluster-grid a:hover {
    background: #dbeafe;
}

.cluster-label {
    margin: 0 0 8px;
    font-size: 12px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: #475569;
}

@media (max-width: 768px) {
    main {
        padding-top: 24px;
        padding-bottom: 40px;
    }

    h1 {
        font-size: 28px;
    }

    .card {
        padding: 16px;
    }
}