@media (max-width: 960px) {
    #login-form,
    #forgot-password-form {
        width: 600px;
        margin-left: -300px;
    }
}
@media (max-width: 600px) {
    #login-form,
    #forgot-password-form {
        width: 100%;
        margin-left: 0;
        top: 0;
        left: 0;
        border-radius: 0;
        height: 100%;
    }
}