body{margin:0;padding:0;background-color:#222;display:flex;justify-content:center;align-items:center;height:100vh;color:#fff;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}#game-container{box-shadow:0 0 20px #00000080;border:2px solid #444}canvas{display:block;background-color:#87ceeb}