html.collaboration-overlay-open,
body.collaboration-overlay-open { overflow: hidden; }

#collaboration-overlay-dialog {
  width: min(1120px, calc(100vw - 24px));
  height: min(820px, calc(100vh - 24px));
  max-width: none;
  max-height: none;
  margin: auto;
  padding: 0;
  overflow: hidden;
  box-sizing: border-box;
  background: transparent;
  border: 0;
}

#collaboration-overlay-dialog::backdrop { background: rgba(3, 15, 29, .8); backdrop-filter: blur(6px); }
#collaboration-overlay-dialog iframe { width: 100%; height: 100%; display: block; background: transparent; border: 0; }

@media (max-width: 720px) {
  #collaboration-overlay-dialog { width: calc(100vw - 12px); height: calc(100vh - 12px); }
}