body{margin:0;padding:0;overflow:hidden}#app{display:flex;flex-direction:row;justify-content:center;align-items:center;width:100vw;height:100vh}#screen{position:absolute;z-index:0;background-color:#000}#backdrop{z-index:0;pointer-events:none;-webkit-user-select:none;user-select:none;display:none}