body {
  font-family: 'Arial', sans-serif;
  text-align: center;
  background: linear-gradient(to bottom, #0099ff, #003366);
  color: white;
  margin: 0;
  padding: 0;
}

h1 {
  margin-top: 20px;
}

#game {
  margin: 20px auto;
  max-width: 480px;
}

canvas {
  background: green;
  border: 4px solid white;
  border-radius: 10px;
}

#controls {
  margin-top: 10px;
}

button {
  padding: 12px 24px;
  font-size: 16px;
  margin: 5px;
  border: none;
  border-radius: 8px;
  background: white;
  color: black;
  font-weight: bold;
}