body { font-family: Arial, sans-serif; background: #f4f4f4; text-align: center; padding: 50px; }
 .box { background: #fff; padding: 20px; border-radius: 8px; box-shadow: 0 0 10px rgba(0,0,0,0.1); display: inline-block; }
   a { display: inline-block; margin-top: 15px; padding: 10px 20px; background: #007BFF; color: #fff; text-decoration: none; border-radius: 5px; }