html,
body {
    height: 100%;
	width: 100%;
}
html {
    display: table;
    margin: auto;
}
body {
    display: table-cell;
    vertical-align: middle;
}
#login-page
{
    display: -webkit-box;
    display: -webkit-flex;
    display:    -moz-box;
    display: -ms-flexbox;
    display:         flex;

    -webkit-box-pack: center;
    -webkit-justify-content: center;
       -moz-box-pack: center;
    -ms-flex-pack: center;
            justify-content: center;
    -webkit-box-align: center;
    -webkit-align-items: center;
       -moz-box-align: center;
    -ms-flex-align: center;
            align-items: center;
}