@media screen and (max-width: 720px) {
    .header-content {
        flex-direction: column;
        gap: 10px;
    }
    
    .nav-menu {
        flex-direction: column;
        text-align: center;
        gap: 10px;
        width: 100%;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .nav-menu a {
        display: block;
        padding: 10px;
        background-color: var(--light-color);
        border-radius: var(--border-radius);
    }
    
    .card-grid {
        grid-template-columns: 1fr;
    }
    
    .counter-number {
        font-size: 3rem;
    }
    
    .modal-content {
        margin: 20px;
        padding: 20px;
    }
    
    .form-group {
        margin-bottom: 15px;
    }
    
    .btn {
        width: 100%;
        margin-bottom: 10px;
    }
    
    .solution-image {
        height: 250px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}