.demo-controls {
  position: absolute;
  width: 100vw;
  z-index: 2000;
}

.demo-before, .demo-after {
  position: absolute;
  top: 50vh;
  width: 20px;
  height: 20px;
  margin: 0;
  padding: 0;
  border-radius: 20px;
  margin-top: -10px;
  background-color: black;
}

.demo-before {
  left: 20px;
}

.demo-after {
  right: 20px;
}

.demo-gallery {
  transition: all .3s ease-out;
  display: block;
  display: table;
}

body {
  overflow-x: hidden;
}