body {
      font-family: Arial, sans-serif;
      background: #f2f2f2;
      padding: 20px;
    }
    .form-container {
      max-width: 500px;
      margin: auto;
      background: #fff;
      padding: 30px;
      border-radius: 8px;
      box-shadow: 0 0 10px rgba(0,0,0,0.1);
    }
    h2 {
      text-align: center;
      margin-bottom: 20px;
    }
    input, textarea {
      width: 100%;
      padding: 12px;
      margin: 10px 0;
      border: 1px solid #ccc;
      border-radius: 5px;
      font-size: 16px;
    }
    button {
      background: #28a745;
      color: white;
      border: none;
      padding: 15px;
      width: 100%;
      border-radius: 5px;
      font-size: 16px;
      cursor: pointer;
    }
    button:hover {
      background: #218838;
    }
    .success {
      color: green;
      margin-top: 10px;
    }
    .error {
      color: red;
      margin-top: 10px;
    }