body {
  background-color: #111;
  color: #fff;
  font-family: sans-serif;
  text-align: center;
  margin: 0;
  padding: 20px;
}

canvas {
  background: #000;
  border: 2px solid #fff;
  display: block;
  margin: 10px auto;
}

#score {
  margin: 10px;
  font-size: 1.2em;
  color: #0DC2FF;
}

#game-over {
  color: red;
  font-size: 1.4em;
  margin-top: 10px;
}

.hidden {
  display: none;
}

.controls {
  margin-top: 20px;
}

.controls button {
  background: #222;
  color: #fff;
  font-size: 1.5em;
  padding: 10px 20px;
  margin: 0 10px;
  border: none;
  border-radius: 8px;
}