/* css/responsive.css */
@media (max-width: 1024px) {
    .calc-layout {
        grid-template-columns: 1fr;
    }

    .calc-sidebar {
        position: static;
    }
}

@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        height: auto;
        padding: 16px 0;
        gap: 16px;
    }

    .main-nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 16px;
    }

    .grid-2-col, .grid-3-col {
        grid-template-columns: 1fr;
    }

    .ad-leaderboard {
        aspect-ratio: 320/50;
        min-height: 50px;
    }

    .card {
        padding: 24px 16px;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 16px;
    }
}