/* Firefox Android can report its retracting browser UI as a bottom safe area.
   The system navigation is outside the page: it must not enlarge our footer.
   iOS, Chromium and the application's existing keyboard/modal rules are preserved. */
@media(max-width:767.98px){
  html[data-su-firefox-android="true"] .bottom-nav[data-mobile-footer]{
    box-sizing:border-box;height:68px;min-height:68px;max-height:68px;
    padding:7px 8px 0;bottom:0;
  }
}