.comparison-block {
  width: 100%;
  position: relative;
  margin: 0 auto;
}
.comparison-block::-moz-selection {
  background-color: transparent;
}
.comparison-block::selection {
  background-color: transparent;
}
.comparison-block::-moz-selection {
  background-color: transparent;
}
.comparison-block *::-moz-selection {
  background-color: transparent;
}
.comparison-block *::selection {
  background-color: transparent;
}
.comparison-block *::-moz-selection {
  background-color: transparent;
}
.comparison-before-img {
  position: absolute;
  top: 0;
  left: 0;
  overflow: hidden;
  z-index: 5;
}
.comparison-after-img {
  position: relative;
  z-index: 1;
}
.comparison-after-img img {
  width: 100%;
}
.comparison-arrow {
  background-color: #fff;
  position: absolute;
  z-index: 10;
  top: 0;
  width: 2px;
  height: 100%;
  left: 50%;
  cursor: pointer;
}
.comparison-arrow:after {
  content: '';
  display: block;
  width: 30px;
  height: 30px;
  border-radius: 15px;
  background-color: #fff;
  position: absolute;
  top: 50%;
  margin-top: -15px;
  left: -14px;
}