body {
  background: radial-gradient(circle at top, #1b0033, #0a001a);
  color: white;
  font-family: "Segoe UI", sans-serif;
  text-align: center;
  margin: 0;
}

h1 {
  margin-top: 20px;
  font-size: 28px;
}

canvas {
  display: block;
  margin: 20px auto;
  border: 2px solid white;
  border-radius: 12px;
}