#popup-banner {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
  }
  
  #popup-content {
    background-color: #fff;
    padding: 20px;
    text-align: center;
  }
  
  #popup-close {
    display: block;
    margin-top: 20px;
    color: #999;
    text-decoration: none;
  }