body, html { margin: 0; padding: 0; overflow: hidden; background: #111; font-family: sans-serif; }
#game-container { position: relative; width: 100vw; height: 100vh; display: flex; justify-content: center; }
canvas { background: #222; display: block; max-width: 100%; height: 100%; border-left: 2px solid #444; border-right: 2px solid #444; }
#ui { position: absolute; top: 0; width: 100%; text-align: center; color: white; pointer-events: none; }
#score { font-size: 24px; margin-top: 20px; text-shadow: 2px 2px #000; }
#start-btn { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); padding: 20px 40px; font-size: 20px; background: #0f0; border: none; cursor: pointer; pointer-events: auto; }