.comparison {
  width: 100%;
  padding-bottom: 100%;
  overflow: hidden;
  position: relative;
}

figure {
  position: absolute;
  background-size: cover;
  font-size: 0;
  width: 100%;
  height: 100%;
  margin: 0;
}

.divisor {
  background-size: cover;
  position: absolute;
  width: 50%;
  box-shadow: 0 5px 10px -2px rgba(0, 0, 0, 0.3);
  bottom: 0;
  height: 100%;
}
.divisor::before, .divisor::after {
  content: "";
  position: absolute;
  right: -2px;
  width: 4px;
  height: calc(50% - 25px);
  background: white;
  z-index: 3;
}
.divisor::before {
  top: 0;
  box-shadow: 0 -3px 8px 1px rgba(0, 0, 0, 0.3);
}
.divisor::after {
  bottom: 0;
  box-shadow: 0 3px 8px 1px rgba(0, 0, 0, 0.3);
}

.handle {
  position: absolute;
  height: 50px;
  width: 50px;
  top: 50%;
  left: 50%;
  transform: translateY(-50%) translateX(-50%);
  z-index: 1;
}
.handle::before, .handle::after {
  content: "";
  width: 0;
  height: 0;
  border: 6px inset transparent;
  position: absolute;
  top: 50%;
  margin-top: -6px;
}
.handle::before {
  border-right: 6px solid white;
  left: 50%;
  margin-left: -17px;
}
.handle::after {
  border-left: 6px solid white;
  right: 50%;
  margin-right: -17px;
}

input[type=range] {
  -webkit-appearance: none;
  -moz-appearance: none;
  position: absolute;
  top: 50%;
  left: -25px;
  transform: translateY(-50%);
  background-color: transparent;
  width: calc(100% + 50px);
  z-index: 2;
}
input[type=range]:focus, input[type=range]:active {
  border: none;
  outline: none;
}

input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  border: none;
  height: 50px;
  width: 50px;
  border-radius: 50%;
  background: transparent;
  border: 4px solid white;
  box-shadow: 0 0 8px 1px rgba(0, 0, 0, 0.3);
}

input[type=range]::-moz-range-track {
  -moz-appearance: none;
  height: 15px;
  width: 100%;
  background-color: transparent;
  position: relative;
  outline: none;
}