full.css

.switch input:checked+span {
  background-color: #5d9cec;
  border-color: #5d9cec;
  transition: all .5s;
}
.switch.switch-lg span {
  width: 50px;
  height: 25px;
}
.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;
}
.switch * {
  cursor: pointer;
}
.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 {
  opacity: 0;
  position: absolute;
  z-index: -1;
}
.switch input:checked+span:after {
  left: 50%;
  transition: all .2s;
}
.switch.switch-lg span:after {
  height: 23px;
  width: 23px;
}