/* keep this from before */
.t-popup__close { display: none !important; }

/* blur the dim overlay behind the popup window */
.t-popup.t-popup_show .t-popup__bg,
.t-popup.t-popup_show .t-popup__container-bg {
  background: rgba(0,0,0,0.5) !important; /* must be semi-transparent */
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px); /* Safari */
  transition: backdrop-filter .3s ease;
}