*{margin:0;padding:0;box-sizing:border-box}html,body{width:100%;height:100%;overflow:hidden}#root{width:100%;height:100%}.app{width:100%;height:100%;display:flex;flex-direction:column;background-color:#1a1a1a}.game-canvas{display:block;width:100%;height:100%;cursor:crosshair}