#progress_loading {
    height: 100%;
    left: 0px;
    position: fixed;
    _position: absolute;
    background-color: white;
    top: 0px;
    width: 100%;
    filter: alpha(opacity = 0);
    -moz-opacity: 0.5;
    opacity: 0.5;
}

#loading_img {
    position: absolute;
    top: 50%;
    left: 50%;
    height: 200px;
    margin-top: -75px; 
    margin-left: -75px; 
    z-index: 999999;
}

.login-box, .register-box {
    margin-top: 2rem;
    width: 90%;
}

.login-form {
    display: flex;
    justify-content: center;
    width: 430px;
}

.login-form2 {
    width: 520px;
}

@media screen and (width < 576px) {
    .login-form {
        width: 90%;
    }
}