/* App-wide rule: content still scrolls by touch, wheel and keyboard, but
   scrollbar chrome never appears, including in nested dialogs and controls. */
html, body, body * { scrollbar-width: none !important; scrollbar-gutter: auto !important; }
html::-webkit-scrollbar, body::-webkit-scrollbar, body *::-webkit-scrollbar {
  display: none !important;
  width: 0 !important;
  height: 0 !important;
}