body {
  background: #f4f6f8;
  font-family: Arial, Helvetica, sans-serif;
}

form {
  background: #fff;
  padding: 20px;
  border-radius: 6px;
}

canvas {
  border: 1px solid #000;
  touch-action: none;
}

label {
  font-size: 0.9rem;
}

hr {
  margin: 1.5rem 0;
}