<style>
    /* Basic Reset */
    body {
      margin: 0;
      font-family: Arial, sans-serif;
    }

    /* Popup Overlay */
    #popup-overlay {
      position: fixed;
      top: 0; left: 0;
      width: 100%; height: 100%;
      background: rgba(0, 0, 0, 0.6);
      display: none;
      justify-content: center;
      align-items: center;
      z-index: 9999;
    }

    /* Popup Box */
    #popup-box {
      background: #fff;
      padding: 30px 25px;
      border-radius: 8px;
      width: 90%;
      max-width: 400px;
      box-shadow: 0 0 15px rgba(0,0,0,0.2);
      position: relative;
    }

    #popup-box h2 {
      margin-top: 0;
      margin-bottom: 15px;
      text-align: center;
      font-size: 22px;
      color: #004080;
    }

    #popup-box input,
    #popup-box select,
    #popup-box textarea {
      width: 100%;
      padding: 10px;
      margin-bottom: 12px;
      border: 1px solid #ccc;
      border-radius: 5px;
      box-sizing: border-box;
      font-size: 14px;
    }

    #popup-box textarea {
      resize: vertical;
    }

    #popup-box .submit-btn {
      background: #004080;
      color: white;
      padding: 10px;
      border: none;
      border-radius: 5px;
      width: 100%;
      font-size: 16px;
      cursor: pointer;
    }

    #popup-box .submit-btn:hover {
      background: #002c5f;
    }

    .close-btn {
      position: absolute;
      top: 10px;
      right: 15px;
      font-size: 22px;
      background: none;
      border: none;
      color: #888;
      cursor: pointer;
    }

    .close-btn:hover {
      color: #000;
    }
  </style>