.login-ui .login-dialog .logo {
        background-image: url('app/ext/ntc/images/ntc.png');
    background-repeat: no-repeat;
    width: 10em;
    -webkit-background-size: 10em auto;
}
div.login-ui {
    background-image: url('https://www.networktocode.com/wp-content/uploads/2020/01/bridging-the-gap-04.jpg');
}
.login-ui .login-dialog {
    background-color: white;
}