.books-strip__progress {
  --books-progress-ms: 2200ms;
  /* position: absolute; */
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  margin: 0;
  padding: 0;
  height: 5px;
  background: rgba(0, 0, 0, 0);
  border-radius: 0;
  overflow: hidden;
  z-index: 4;
}

.books-strip__progress-fill {
  display: block;
  height: 100%;
  width: 100%;
  transform-origin: left center;
  transform: scaleX(0);
  background: #ffd641;
  /*
  background: linear-gradient(
    90deg,
    #ffd84a 0%,
    #ffb300 45%,
    #ff7a00 100%
  );
  */
  box-shadow: 0 0 10px rgba(255, 156, 0, 0.7);
  border-radius: inherit;
}

.books-strip__progress-fill.is-running {
  animation-name: books-progress-fill;
  animation-duration: var(--books-progress-ms);
  animation-timing-function: linear;
  animation-fill-mode: forwards;
}

.books-marquee:hover .books-strip__progress-fill.is-running {
  animation-play-state: paused;
}

@keyframes books-progress-fill {
  from {
    transform: scaleX(0);
  }
  to {
    transform: scaleX(1);
  }
}