.advertisement {
      position: fixed;
      left: 0;
      bottom: 0;
      flex: 1;
      display: flex;
      flex-direction: row;
      justify-content: center;
      align-items: center;
      width: 100%;
      z-index: 99999;
      padding: 20px;
      background: #fff;
      border-top: 1px #ccc solid;
    }
   
    .hide {
      display: none !important;
    }
    .show {
      display: flex !important;
    }