.valign-wrapper{position:absolute; height:100%; width:100%; display:table;}
.valign-inner{display:table-cell; vertical-align:middle;}
.login-box{width:95%; max-width:500px; height:500px; background:#fff; margin:0 auto; padding:50px;}
.login-bg{background:url(../../img/login-bg.jpg) no-repeat left top; background-size:cover;}