*{margin:0;padding:0;box-sizing:border-box}body{overflow:hidden;background-color:#000}#game-container{width:100vw;height:100vh}#game-container canvas{display:block}#crosshair{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);color:#fff;font-size:24px;font-weight:700;pointer-events:none;text-shadow:1px 1px 2px black;z-index:100;display:none}#instructions{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);color:#fff;font-family:Arial,sans-serif;font-size:18px;text-align:center;padding:30px 50px;background-color:#000000b3;border-radius:10px;cursor:pointer;z-index:200}#instructions:hover{background-color:#000000d9}body.playing #crosshair{display:block}body.playing #instructions{display:none}