.popup-overlay {
      position: fixed;
      top: 0; left: 0; right: 0; bottom: 0;
      background-color: rgba(0, 0, 0, 0.6);
      display: flex;
      align-items: center;
      justify-content: center;
      z-index: 9999;
      padding: 10px;
    }
    .popup {
      background: #fff;
      width: 100%;
      max-width: 600px;
      padding: 20px;
      border-radius: 12px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
      overflow-y: auto;
      max-height: 95vh;
      animation: fadeIn 0.3s ease-in-out;
    }
    h2 {
      font-size: 20px;
      margin-bottom: 10px;
      color: #004080;
    }
    p {
      font-size: 16px;
      margin-bottom: 10px;
      line-height: 1.6;
    }
    .question {
      margin-bottom: 20px;
    }
    label {
      display: inline-block;
      margin-right: 15px;
      font-weight: normal;
      font-size: 16px;
    }
    input[type="radio"] {
      margin-right: 5px;
    }
    .button-container {
      text-align: right;
      margin-top: 15px;
    }
    .btn {
      padding: 10px 24px;
      font-size: 16px;
      border: none;
      border-radius: 8px;
      background-color: #004080;
      color: white;
      cursor: pointer;
    }
    .btn:hover {
      background-color: #003366;
    }

    @keyframes fadeIn {
      from { opacity: 0; transform: translateY(10px); }
      to { opacity: 1; transform: translateY(0); }
    }

    @media (max-width: 480px) {
      h2 {
        font-size: 18px;
      }
      label {
        display: block;
        margin-bottom: 8px;
      }
      .btn {
        width: 100%;
        margin-top: 10px;
      }
      .button-container {
        text-align: center;
      }
    }