@media (max-width: 1200px) {
        .main-grid { grid-template-columns: 1fr; }
        .metrics-grid { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 768px) {
        .metrics-grid { grid-template-columns: 1fr; }
        .twin-row { grid-template-columns: 1fr; }
    }