/* One vertical document scroll; the timeline stays horizontally scrollable. */
#recorder .rc-scroll{
  max-height:none;
  height:auto;
  overflow-x:auto;
  overflow-y:hidden;
  overscroll-behavior-x:contain;
  overscroll-behavior-y:auto;
}
#recorder .rc-transport{
  position:sticky;
  top:0;
  z-index:40;
}