body,html{margin:0;overflow:hidden;padding:0;position:relative}body,canvas,html{height:100%;width:100%}canvas{left:50%;position:absolute;transform:translateX(-50%)}#layer1{z-index:0}#layer2{z-index:1}#layer3{z-index:2}#layer4{z-index:3}#c{bottom:0;display:none;position:absolute;width:100%;z-index:4}@media(pointer:coarse),(pointer:none){#c{display:block}}#c>#al{bottom:7rem;left:2rem}#c>#au{bottom:11rem;left:9rem}#c>#ar{bottom:7rem;left:16rem}#c>#ad{bottom:4rem;left:9rem}#c>#s{bottom:7rem;right:9rem}#c>#d{bottom:7rem;right:2rem}#c>.btn{background:none;border:2px solid #fff;border-radius:100%;color:#fff;font-size:2rem;height:6rem;position:absolute;width:6rem}