body{margin:0;padding:0}.bg-wrapper{position:absolute;overflow:hidden;background:#000}.bg,.bg-wrapper{width:100%;height:100%}.bg{opacity:.25;background-size:cover;background-repeat:no-repeat;background-position:50% 50%}.login-button{position:absolute;top:50%;left:50%;margin-left:-60px}.login-title{position:absolute;width:100%;top:50%;margin-top:-60px;font-size:32px;color:#fff;text-align:center;font-family:Roboto,arial,sans-serif}.is_archive{color:#777}