checked3.css

.switch input:checked+span {
  background-color: #5d9cec;
  border-color: #5d9cec;
  transition: all .5s;
}

.switch span:after {
  content: "";
  position: absolute;
  background-color: #fff;
  top: 0;
  left: 0;
  height: 18px;
  width: 18px;
  border: 1px solid #ddd;
  border-radius: 400px;
  box-shadow: 1px 1px 3px rgba(0,0,0,.1);
  -webkit-transition: all .2s;
}

.switch input:checked+span:after {
  left: 50%;
  transition: all .2s;
}