*,*:before,*:after{box-sizing:border-box}html,body{margin:0;padding:0;width:100%;height:100%;overflow:hidden}#root{width:100%;height:100%}.app-shell{position:relative;width:100%;height:100%}.render-canvas{display:block;width:100%;height:100%;touch-action:none}.hud{position:absolute;top:1rem;left:1rem;color:#fff;text-shadow:0 1px 3px rgba(0,0,0,.8);pointer-events:none}.hud h1{margin:0;font-size:1.25rem}