/* Scrollbars are invisible at rest and only paint while that exact element is
   being scrolled. scrollbar-color is inherited, so the reset goes on *, never
   on html, or it leaks into every nested scroller. */
* { scrollbar-width: thin; scrollbar-color: transparent transparent; }
*::-webkit-scrollbar { width: 6px; height: 6px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb { background: transparent; border-radius: 3px; }

.is-scrolling { scrollbar-color: rgba(255,178,63,.45) transparent; }
.is-scrolling::-webkit-scrollbar-thumb { background: rgba(255,178,63,.45); }