body {
  text-align: center;
  background: #e3f2fd;
  font-family: Arial, sans-serif;
}

h1 {
  color: #1565c0;
}

h2 {
  color: #ff6f00;
}

canvas {
  border: 3px dashed #999;
  background: white;
  touch-action: none;
}

.buttons {
  margin-top: 15px;
}

button {
  font-size: 18px;
  padding: 10px 20px;
  margin: 5px;
  background: #4caf50;
  color: white;
  border: none;
  border-radius: 10px;
}