.appearance {
  position: absolute;
  display: inline-block;
  width: 60px;
  height: 34px;
  top: .7rem;
  right: 1.5rem;
  z-index: 4;
}

.appearance input {
  opacity: 0;
  width: 0;
  height: 0;
}

.appearanceSlider {
  position: absolute;
  cursor: pointer;
  border-radius: 34px;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  transition: .3s;
}

.appearanceSlider:before {
  position: absolute;
  border-radius: 50%;
  content: "";
  height: 26px;
  width: 26px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  transition: .3s;
}

input:checked + .appearanceSlider {
  background-color: #2E3747;
}

input:checked + .appearanceSlider:before {
  transform: translateX(25px);
}