#bumble-download-email-dialog {
  display: none;
  opacity:0;
  background: #ebebeb;
  position: fixed;
  left: 50%;
  top: 100%;
  -ms-transform: translate(-50%, -50%);
  -moz-transform: translate(-50%, -50%);
  -webkit-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);

  transition: opacity .5s ease;

  width: 80%;
  padding: 20px 50px;
  z-index: 1000;
}

#bumble-download-email-dialog.shown {
  display: block;
  opacity: 1;
  top: 50%;
}