body {
  font-family: Arial, sans-serif;
  padding: 20px;
  background-color: #f4f4f4;
  color: #333;
}
pre {
  background: #fff;
  padding: 10px;
  border-radius: 8px;
  box-shadow: 0 0 5px rgba(0,0,0,0.1);
}