.cluster-dashboard {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.cluster-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.cluster-header h1 {
    margin: 0;
    font-size: 1.5rem;
    color: var(--text-primary, #111);
}

.cluster-status {
    font-size: 0.85rem;
    color: var(--text-secondary, #666);
    background: var(--bg-secondary, #f3f4f6);
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
}

.cluster-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1rem;
}

.cluster-card {
    background: var(--bg-primary, #fff);
    border: 1px solid var(--border, #e5e7eb);
    border-radius: 8px;
    padding: 1.25rem;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.node-id {
    font-weight: 600;
    font-size: 0.9rem;
    font-family: var(--font-mono, monospace);
    color: var(--text-primary, #111);
}

.heartbeat-badge {
    font-size: 0.75rem;
    color: var(--text-secondary, #666);
    background: var(--bg-secondary, #f3f4f6);
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
}

.node-endpoint {
    font-size: 0.8rem;
    color: var(--text-secondary, #666);
    margin-bottom: 0.75rem;
    font-family: var(--font-mono, monospace);
}

.card-stats {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 0.5rem;
}

.stat {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.stat-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--text-secondary, #999);
}

.stat-value {
    font-size: 0.9rem;
    font-weight: 500;
    font-family: var(--font-mono, monospace);
    color: var(--text-primary, #111);
}

.cluster-empty {
    color: var(--text-secondary, #666);
    text-align: center;
    padding: 3rem 1rem;
}