  <style>
    body {
      font-family: Arial, sans-serif;
      background: #f4f4f4;
      padding: 20px;
    }

    /* Button to open the popup */
    .open-button {
      padding: 10px 20px;
      background-color: #007bff;
      color: white;
      border: none;
      border-radius: 5px;
      cursor: pointer;
    }

    /* Popup container */
    .popup-form {
      display: none;
      position: fixed;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      background-color: #fff;
      border-radius: 10px;
      padding: 25px;
      box-shadow: 0 5px 15px rgba(0,0,0,0.3);
      z-index: 1000;
      width: 300px;
    }

    .popup-form input,
    .popup-form textarea {
      width: 100%;
      padding: 10px;
      margin: 8px 0;
      border: 1px solid #ccc;
      border-radius: 4px;
      box-sizing: border-box;
    }

    .popup-form button {
      background-color: #78B63C;
      color: white;
      padding: 10px;
      width: 100%;
      border: none;
      border-radius: 4px;
      cursor: pointer;
    }

    .popup-form .close-btn {
      background-color: #304B7B;
      margin-top: 10px;
    }

    /* Dim background when popup is open */
    .popup-overlay {
      display: none;
      position: fixed;
      top: 0; left: 0;
      width: 100%; height: 100%;
      background: rgba(0, 0, 0, 0.5);
      z-index: 999;
    }
  </style>