*{margin:0;padding:0;box-sizing:border-box}body{overflow:hidden;font-family:Arial,sans-serif;background-color:#000}#game-container{position:fixed;top:0;left:0;width:100%;height:100%}#ui-container{position:fixed;top:20px;left:20px;color:#fff;font-size:18px;text-shadow:1px 1px 2px black;z-index:10}#score{margin-bottom:10px}#fps{font-size:14px}#loading-screen{position:fixed;top:0;left:0;width:100%;height:100%;background-color:#000;display:flex;justify-content:center;align-items:center;z-index:1000}.loading-container{width:60%;text-align:center}.loading-bar-container{width:100%;background-color:#333;height:20px;border-radius:10px;margin-bottom:10px}#loading-bar{height:100%;width:0%;background-color:#4caf50;border-radius:10px;transition:width .3s ease-in-out}#loading-text{color:#fff;font-size:16px}