body {
  font-family: Arial, sans-serif;
  text-align: center;
  background-color: #f4f4f9;
  margin: 0;
  padding: 0;
}
h1 {
  margin-top: 20px;
}
canvas {
  display: block;
  margin: 20px auto;
  background: #87ceeb;
  border: 1px solid #000;
}
#controls {
  display: flex;
  justify-content: center;
  margin-top: 10px;
}
#controls button {
  padding: 10px;
  background: #007bff;
  color: white;
  border: none;
  border-radius: 4px;
  font-size: 16px;
  cursor: pointer;
}