html {display:table; width:100%; height:100%;}
body {display:table-cell; margin:0; vertical-align:middle; background:#4d4646 50% 50% no-repeat; background-size:cover;}
.background-container {position:fixed; left:0; right:0; top:0; bottom:0;}
noindex:-o-prefocus, .background-container {display:none;}
.content {background:rgba(0, 0, 0, 0.5); position:relative; padding:40px 0;}