body {
  background-color: #111;
  color: white;
  font-family: Arial, sans-serif;
  text-align: center;
}

canvas {
  display: block;
  margin: 1em auto;
  background: #222;
  border: 2px solid #555;
}

#controls {
  margin-top: 20px;
}

button {
  padding: 8px 12px;
  margin: 5px;
  font-size: 14px;
  background-color: #444;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

button:hover {
  background-color: #666;
}

input {
  padding: 6px;
  margin: 5px;
  font-size: 14px;
  border-radius: 4px;
  border: 1px solid #333;
  background-color: #222;
  color: white;
}