*{margin:0;padding:0;box-sizing:border-box}body{font-family:Arial,sans-serif;background:#000;color:#fff;display:flex;justify-content:center;align-items:center;min-height:100vh;overflow:hidden}#game-container{position:relative;width:800px;height:600px}#gameCanvas{background:#000;border:2px solid #444;display:block}#ui-overlay{position:absolute;top:10px;left:10px;right:10px;display:flex;justify-content:space-between;font-size:20px;font-weight:700;text-shadow:0 0 5px #00f,0 0 10px #00f;z-index:10}.screen{position:absolute;top:0;left:0;width:100%;height:100%;display:flex;flex-direction:column;justify-content:center;align-items:center;background:#000c;z-index:20}.screen.hidden{display:none}.screen h1,.screen h2{font-size:48px;margin-bottom:20px;color:#0ff;text-shadow:0 0 10px #0ff}.screen button{background:#00f;color:#fff;border:none;padding:15px 30px;font-size:20px;margin:10px;cursor:pointer;border-radius:5px;transition:all .3s;font-weight:700}.screen button:hover{background:#0ff;color:#000;transform:scale(1.05);box-shadow:0 0 15px #0ff}.instructions{margin-top:30px;text-align:center;font-size:18px;line-height:1.6}.instructions p{margin:10px 0}#controls-info{position:absolute;bottom:60px;left:0;width:100%;text-align:center;font-size:16px;color:#aaa}#mobile-controls{position:absolute;bottom:10px;left:0;width:100%;display:none;justify-content:space-around;padding:10px}#mobile-controls button{background:#fff3;border:2px solid #0ff;color:#0ff;width:80px;height:50px;font-size:24px;border-radius:10px;cursor:pointer}#final-score{font-size:32px;margin:20px 0;color:#ff0}@media (max-width: 850px){#game-container{width:100%;height:100vh;max-width:500px;max-height:700px}#gameCanvas{width:100%;height:100%}#mobile-controls{display:flex}#controls-info{display:none}.screen h1,.screen h2{font-size:36px}.instructions{font-size:16px;padding:0 20px}}