@media (max-width: 1199px) {
    .register-container {
        padding: 16px;
    }
    
    .register-box {
        padding: 32px 24px;
    }
    
    .input-with-btn {
        flex-direction: column;
    }
    
    .btn-check {
        width: 100%;
        padding: 12px;
    }
}