@keyframes tonext {
  75% {
    left: 0;
  }
  95% {
    left: 100%;
  }
  98% {
    left: 100%;
  }
  99% {
    left: 0;
  }
}

@keyframes tostart {
  75% {
    left: 0;
  }
  95% {
    left: -300%;
  }
  98% {
    left: -300%;
  }
  99% {
    left: 0;
  }
}

@keyframes snap {
  96% {
    scroll-snap-align: center;
  }
  97% {
    scroll-snap-align: none;
  }
  99% {
    scroll-snap-align: none;
  }
  100% {
    scroll-snap-align: center;
  }
}


ol, li {
  list-style: none;
  margin: 0;
  padding: 0;
}

.carousel {
  position: relative;
  padding-top: 75%;
  filter: drop-shadow(0 0 10px #0003);
  perspective: 100px;
}

.carousel__viewport {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  display: flex;
  overflow-x: scroll;
  counter-reset: item;
  scroll-behavior: smooth;
  scroll-snap-type: x mandatory;
}

.carousel__slide {
  position: relative;
  flex: 0 0 100%;
  width: 100%;
  background-color: #ffffff;
  counter-increment: item;
}

.carousel__slide:nth-child(even) {
  background-color: #ffffff;
}

.carousel__slide:before {
  content: counter(item);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate3d(-50%,-40%,70px);
  color: #fff;
  font-size: 2em;
}

.carousel__snapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  scroll-snap-align: center;
}

@media (hover: hover) {
  .carousel__snapper {
    animation-name: tonext, snap;
    animation-timing-function: ease;
    animation-duration: 4s;
    animation-iteration-count: infinite;
  }

  .carousel__slide:last-child .carousel__snapper {
    animation-name: tostart, snap;
  }
}

@media (prefers-reduced-motion: reduce) {
  .carousel__snapper {
    animation-name: none;
  }
}

.carousel:hover .carousel__snapper,
.carousel:focus-within .carousel__snapper {
  animation-name: none;
}

.carousel__navigation {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  text-align: center;
}

.carousel__navigation-list,
.carousel__navigation-item {
  display: inline-block;
}