body,html{overflow:hidden;background:#111;margin:0}canvas{width:100%;height:100%;position:fixed}.content{position:fixed;top:0;left:0;width:100%;height:100%;z-index:3}.content-item{width:30vw;height:auto;box-sizing:border-box;padding:3vw;font-size:2vw;font-family:Arial,Helvetica,sans-serif;background-color:rgba(0,0,0,.5);position:absolute;color:#fff}