body { margin: 0; background: #000; overflow: hidden; font-family: 'Courier New', monospace; }
canvas { display: block; }
#ui { 
  position: absolute; top: 20px; width: 100%; text-align: center; 
  color: white; font-size: 24px; text-shadow: 0 0 10px #ff00ff; pointer-events: none; 
}
#game-over { 
  position: absolute; top: 50%; width: 100%; text-align: center; 
  color: red; font-size: 40px; display: none; font-weight: bold; 
}