The css code for my checkbox project...

checked1.css

.switch span {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 20px;
  background-color: #fff;
  border: 1px solid #ddd;
  border-radius: 100px;
  transition: all .5s;
  box-shadow: 1px 2px 3px rgba(0,0,0,.1) inset;
  vertical-align: middle;
}