#app,html,body,div{overflow:hidden;margin:0;padding:0;overscroll-behavior:none}html,body{overflow:hidden;width:100%;height:100%;background:#444}.container{overflow:hidden;width:100%;height:100%;-webkit-user-select:none;user-select:none;pointer-events:none;-webkit-touch-callout:none}.child{background-color:#444;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}