:root {
    --hub-border: var(--border-subtle);
}

.hub-hero {
    padding-bottom: 40px;
}

.hub-meta-row {
    display: flex;
    justify-content: center;
    gap: 12px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    flex-wrap: wrap;
}

.hub-cta-row {
    margin-top: 24px;
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.hub-shell {
    max-width: 980px;
    margin: 0 auto 80px;
    padding: 0 24px 40px;
}

.hub-card {
    background: var(--bg-surface);
    border: 1px solid var(--hub-border);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-sm);
}

.hub-content h2 {
    font-size: 1.6rem;
    margin: 2.2rem 0 1rem;
    padding-left: 14px;
    border-left: 4px solid var(--primary-color);
}

.hub-content h3 {
    font-size: 1.2rem;
    margin: 1.6rem 0 0.8rem;
}

.hub-content p {
    margin: 1rem 0;
    line-height: 1.8;
    color: var(--text-primary);
}

.hub-content ul,
.hub-content ol {
    padding-left: 1.5rem;
    margin: 1rem 0;
}

.hub-content li {
    margin-bottom: 0.5rem;
}

.hub-content a {
    color: var(--primary-color);
    text-decoration: none;
}

.hub-content a:hover {
    text-decoration: underline;
}

.hub-toc {
    background: var(--bg-surface-hover);
    border: 1px solid var(--hub-border);
    border-radius: var(--radius-md);
    padding: 16px;
    margin: 24px 0;
}

.hub-toc h3 {
    margin-top: 0;
}

.hub-toc ul {
    list-style: none;
    padding-left: 0;
}

.hub-toc li {
    margin-bottom: 8px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin: 24px 0;
}

.info-card {
    background: var(--bg-surface-hover);
    border: 1px solid var(--hub-border);
    border-radius: var(--radius-md);
    padding: 16px;
}

.info-card h4 {
    margin: 0 0 8px;
    font-size: 1rem;
}

.hub-table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0 24px;
    font-size: 0.95rem;
}

.hub-table th,
.hub-table td {
    border: 1px solid var(--hub-border);
    padding: 12px;
    text-align: left;
}

.hub-table th {
    background: var(--bg-surface-hover);
    font-weight: 600;
}

.table-wrapper {
    overflow-x: auto;
    margin: 16px 0 24px;
}

.callout {
    background: #fef3c7;
    border: 1px solid #f59e0b;
    color: #92400e;
    border-radius: var(--radius-md);
    padding: 16px;
    margin: 20px 0;
    font-size: 0.95rem;
}

@media (max-width: 768px) {
    .hub-card {
        padding: 24px;
    }
}