body{
    background:#000;

}

.container{
   position: absolute;
   top: 50%;
   margin-top: -200px;/* half of #content height*/
   left: 0;
   width: 100%;
}

.content {
   width: 624px;
   margin-left: auto;
   margin-right: auto;
   height: 395px;
}

.centered{
    width:100%;
    text-align:center;
}

.margined{
    margin-top:80px;
}