body {
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
    margin: 0;
    padding: 0;
  }
  
  .container {
    max-width: 600px;
    margin: 100px auto;
    background: gray;
    padding: 40px;
    text-align: center;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  }