.switch {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 20px;
  margin-left: 4px;
}

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

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  transition: .2s;
  border-radius: 20px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 2px;
  bottom: 2px;
  background-color: white;
  transition: .2s;
  border-radius: 50%;
}

.switch input:checked+.slider {
  background-color: #4caf50;
}

.switch input:checked+.slider:before {
  transform: translateX(20px);
}