Pure CSS carousel exploration

carousel.css

.carousel {
  height: 300px;
  width: 400px;
  overflow: hidden;
  text-align: center;
  position: relative;
  padding: 0;
  list-style: none;
}
.carousel__controls,
.carousel__activator {
  display: none;
}
.carousel__activator:nth-of-type(5):checked ~ .carousel__track {
  transform: translateX(-400%);
}
.carousel__activator:nth-of-type(5):checked ~ .carousel__slide:nth-of-type(5) {
  animation: carousel-show-slide 0.5s;
  top: 0;
  left: 0;
  right: 0;
}
.carousel__activator:nth-of-type(5):checked ~ .carousel__controls:nth-of-type(5) {
  display: block;
}
.carousel__activator:nth-of-type(5):checked ~ .carousel__indicators .carousel__indicator:nth-of-type(5) {
  opacity: 1;
}
.carousel__activator:nth-of-type(4):checked ~ .carousel__track {
  transform: translateX(-300%);
}
.carousel__activator:nth-of-type(4):checked ~ .carousel__slide:nth-of-type(4) {
  animation: carousel-show-slide 0.5s;
  top: 0;
  left: 0;
  right: 0;
}
.carousel__activator:nth-of-type(4):checked ~ .carousel__controls:nth-of-type(4) {
  display: block;
}
.carousel__activator:nth-of-type(4):checked ~ .carousel__indicators .carousel__indicator:nth-of-type(4) {
  opacity: 1;
}
.carousel__activator:nth-of-type(3):checked ~ .carousel__track {
  transform: translateX(-200%);
}
.carousel__activator:nth-of-type(3):checked ~ .carousel__slide:nth-of-type(3) {
  animation: carousel-show-slide 0.5s;
  top: 0;
  left: 0;
  right: 0;
}
.carousel__activator:nth-of-type(3):checked ~ .carousel__controls:nth-of-type(3) {
  display: block;
}
.carousel__activator:nth-of-type(3):checked ~ .carousel__indicators .carousel__indicator:nth-of-type(3) {
  opacity: 1;
}
.carousel__activator:nth-of-type(2):checked ~ .carousel__track {
  transform: translateX(-100%);
}
.carousel__activator:nth-of-type(2):checked ~ .carousel__slide:nth-of-type(2) {
  animation: carousel-show-slide 0.5s;
  top: 0;
  left: 0;
  right: 0;
}
.carousel__activator:nth-of-type(2):checked ~ .carousel__controls:nth-of-type(2) {
  display: block;
}
.carousel__activator:nth-of-type(2):checked ~ .carousel__indicators .carousel__indicator:nth-of-type(2) {
  opacity: 1;
}
.carousel__activator:nth-of-type(1):checked ~ .carousel__track {
  transform: translateX(0%);
}
.carousel__activator:nth-of-type(1):checked ~ .carousel__slide:nth-of-type(1) {
  animation: carousel-show-slide 0.5s;
  top: 0;
  left: 0;
  right: 0;
}
.carousel__activator:nth-of-type(1):checked ~ .carousel__controls:nth-of-type(1) {
  display: block;
}
.carousel__activator:nth-of-type(1):checked ~ .carousel__indicators .carousel__indicator:nth-of-type(1) {
  opacity: 1;
}
.carousel__control {
  height: 30px;
  width: 30px;
  margin-top: -15px;
  top: 50%;
  position: absolute;
  display: block;
  cursor: pointer;
  border-width: 5px 5px 0 0;
  border-style: solid;
  border-color: #fafafa;
  opacity: 0.35;
  outline: 0;
  z-index: 3;
}
.carousel__control:hover {
  opacity: 1;
}
.carousel__control--forward {
  left: 10px;
  transform: rotate(-135deg);
}
.carousel__control--backward {
  right: 10px;
  transform: rotate(45deg);
}
.carousel__indicators {
  position: absolute;
  bottom: 20px;
  width: 100%;
  text-align: center;
}
.carousel__indicator {
  height: 15px;
  width: 15px;
  border-radius: 100%;
  display: inline-block;
  z-index: 2;
  cursor: pointer;
  opacity: 0.35;
  margin: 0 2.5px 0 2.5px;
}
.carousel__indicator:hover {
  opacity: 0.75;
}
.carousel__track {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  padding: 0;
  margin: 0;
  transition: transform 0.5s ease 0s;
}
.carousel__track .carousel__slide {
  display: block;
  top: 0;
  left: 0;
  right: 0;
}
.carousel__track .carousel__slide:nth-of-type(1) {
  transform: translateX(0%);
}
.carousel__track .carousel__slide:nth-of-type(2) {
  transform: translateX(100%);
}
.carousel__track .carousel__slide:nth-of-type(3) {
  transform: translateX(200%);
}
.carousel__track .carousel__slide:nth-of-type(4) {
  transform: translateX(300%);
}
.carousel__track .carousel__slide:nth-of-type(5) {
  transform: translateX(400%);
}
.carousel__slide {
  height: 100%;
  position: absolute;
  overflow-y: auto;
}

carousel.html

<ul class="carousel my-carousel">
    <input class="carousel__activator" type="radio" id="1" name="activator" checked="checked"/>
    <input class="carousel__activator" type="radio" id="2" name="activator"/>
    <input class="carousel__activator" type="radio" id="3" name="activator"/>
    <div class="carousel__controls">
      <label class="carousel__control carousel__control--backward" for="2"></label>
      <label class="carousel__control carousel__control--forward" for="3"></label>
    </div>
    <div class="carousel__controls">
      <label class="carousel__control carousel__control--backward" for="3"></label>
      <label class="carousel__control carousel__control--forward" for="1"></label>
    </div>
    <div class="carousel__controls">
      <label class="carousel__control carousel__control--backward" for="1"></label>
      <label class="carousel__control carousel__control--forward" for="2"></label>
    </div>
    <li class="carousel__slide">
      <h1>1</h1>
    </li>
    <li class="carousel__slide">
      <h1>2</h1>
    </li>
    <li class="carousel__slide">
      <h1>3</h1>
    </li>
    <div class="carousel__indicators">
      <label class="carousel__indicator" for="1"></label>
      <label class="carousel__indicator" for="2"></label>
      <label class="carousel__indicator" for="3"></label>
    </div>
  </ul>