* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: Arial, sans-serif;
      background-color: #f4f7f9;
      color: #333;
      line-height: 1.6;
      padding: 20px;
    }

    .container {
      max-width: 700px;
      margin: 0 auto;
      background: #fff;
      padding: 30px;
      border-radius: 8px;
      box-shadow: 0 0 10px rgba(0,0,0,0.1);
    }

    h1 {
      text-align: center;
      color: #1a73e8;
      margin-bottom: 20px;
    }

    form label {
      display: block;
      margin: 15px 0 5px;
      font-weight: bold;
    }

    form input,
    form textarea {
      width: 100%;
      padding: 10px;
      border: 1px solid #ccc;
      border-radius: 4px;
      resize: vertical;
    }

    form button {
      display: inline-block;
      background-color: #1a73e8;
      color: white;
      padding: 12px 20px;
      border: none;
      border-radius: 4px;
      cursor: pointer;
      margin-top: 20px;
      font-size: 16px;
    }

    form button:hover {
      background-color: #155ab6;
    }

    .success {
      color: green;
      margin-top: 15px;
    }

    .error {
      color: red;
      margin-top: 15px;
    }

    @media (max-width: 600px) {
      .container {
        padding: 20px;
      }
    }