.popup {
    display: none;
    position: fixed;
    top: 30%; /* Adjust the top position as per your requirement */
    left: 50%;
    transform: translate(-50%, -50%);
    width: 400px; /* Adjust the width as per your requirement */
    padding: 20px;
    background-color: #f0f0f0;
    text-align: center;
    border: 1px solid #ccc;
    border-radius: 5px;
  }
  
  #close-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 20px;
    cursor: pointer;
  }
  