.toggle-switch {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 22px;
}
.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}
.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0;
  right: 0; bottom: 0;
  background-color: #ccc;
  transition: .3s;
  border-radius: 22px;
}
.toggle-slider:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: .3s;
  border-radius: 50%;
}
input:checked + .toggle-slider {
  background-color: #4CAF50;
}
input:checked + .toggle-slider:before {
  transform: translateX(18px);
}