body {
    background-color: gray;
    ## background-position: center;
    ## background-repeat: no-repeat;
    ## background-size: cover;
    ## background-image: url('bg.jpg');
}

.bg-img{
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.login_form{
    width: 20em;
}