*{margin:0;padding:0;box-sizing:border-box}html,body{width:100%;height:100%;overflow:hidden}body{background:linear-gradient(135deg,#1a0a2e,#16213e,#0f3460);display:flex;justify-content:center;align-items:center;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}#game-container{display:flex;justify-content:center;align-items:center}#game-container canvas{border-radius:15px;box-shadow:0 0 50px #ffd7004d,0 0 100px #ffd7001a;border:4px solid #ffd700}