html,body{margin:0;width:100%;height:100%;overflow:hidden;background:#000;touch-action:none;font-family:Impact,Arial Black,sans-serif}#game{display:block;width:100vw;height:100vh;background:#000}#fs{position:fixed;right:14px;top:14px;z-index:5;background:rgba(0,0,0,.55);color:white;border:2px solid rgba(255,255,255,.45);border-radius:12px;width:44px;height:44px;font-size:22px}#fs:active{transform:scale(.94)}