/* Created only for an article explicitly marked data-reading-progress. */
.case-study-reading-progress {
  position: fixed;
  z-index: 19;
  top: 0;
  inset-inline: 0;
  height: 3px;
  background: transparent;
  pointer-events: none;
}

.case-study-reading-progress > span {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
  /* Direct scroll feedback, with no easing or motion in either preference mode. */
  transition: none;
  animation: none;
}