body {
  display: flex;
  flex-direction: column;
  align-items: center;
  font-family: Arial, sans-serif;
  background-color: #f0f0f0;
  padding: 20px;
}
canvas {
  border: 1px solid #ccc;
  margin-bottom: 20px;
  background-color: #fff;
}
div {
  text-align: center;
  max-width: 600px;
  line-height: 1.5;
}