.main-content {
      padding: 30px;
    }

    form {
      background: #fff;
      padding: 20px;
      border-radius: 8px;
      box-shadow: 0 0 5px rgba(0,0,0,0.1);
      max-width: 400px;
    }

    .form-group {
      margin-bottom: 15px;
    }

    label {
      display: block;
      font-weight: bold;
      margin-bottom: 5px;
    }

    input, select {
      width: 100%;
      padding: 8px;
      border: 1px solid #ccc;
      border-radius: 4px;
    }

    button {
      padding: 10px 20px;
      background: #172b4d;
      color: white;
      border: none;
      border-radius: 5px;
      cursor: pointer;
    }

    .message {
      color: green;
      margin-top: 10px;
    }