@media (max-width: 992px) {
    .references-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .references-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .page-header {
        padding: 140px 0 60px 0;
    }

    .section-title {
        font-size: 2.2rem;
    }
}

@media (max-width: 576px) {
    .references-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.mobile-nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(30, 60, 114, 0.95);
    z-index: 1001;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.mobile-nav.active {
    display: flex;
}

.mobile-nav .nav-menu {
    flex-direction: column;
    gap: 2rem;
    text-align: center;
    display: flex;
    list-style: none;
}

.mobile-nav .nav-menu a {
    font-size: 1.5rem;
    color: white;
    text-decoration: none;
}

.close-btn {
    position: absolute;
    top: 2rem;
    right: 2rem;
    background: none;
    border: none;
    color: white;
    font-size: 2rem;
    cursor: pointer;
}