@media (max-width: 992px) {
    .card-container {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    header {
        padding: 0 15px;
    }
    .nav a {
        margin: 0 8px;
    }
    .banner h1 {
        font-size: 24px;
    }
}

@media (max-width: 576px) {
    .card-container {
        grid-template-columns: 1fr;
    }
    .nav-group {
        flex-direction: column;
        gap: 10px;
    }
    .lang-btn {
        margin-left: 0;
    }
}