iOS 7 Style Switches with Pure CSS/CSS3

A pure CSS solution to create animated iOS 7 style switches with labels using CSS3 box-shadow and transition properties.

How to use it:

Create a regular checkbox that will be converted into a iOS 7 style switch button.

<input type="checkbox" name="checkbox1" id="checkbox1" class="ios-toggle" checked/>
<label for="checkbox1" class="checkbox-label" data-off="off" data-on="on"></label>

The core CSS styles.

.ios-toggle,
.ios-toggle:active {
  position: absolute;
  top: -5000px;
  height: 0;
  width: 0;
  opacity: 0;
  border: none;
  outline: none;
}
.checkbox-label {
  display: block;
  position: relative;
  padding: 10px;
  margin-bottom: 20px;
  font-size: 12px;
  line-height: 16px;
  width: 100%;
  height: 36px;
  /*border-radius*/
  -webkit-border-radius: 18px;
  -moz-border-radius: 18px;
  border-radius: 18px;
  background: #f8f8f8;
  cursor: pointer;
}
.checkbox-label:before {
  content: '';
  display: block;
  position: absolute;
  z-index: 1;
  line-height: 34px;
  text-indent: 40px;
  height: 36px;
  width: 36px;
  /*border-radius*/
  -webkit-border-radius: 100%;
  -moz-border-radius: 100%;
  border-radius: 100%;
  top: 0px;
  left: 0px;
  right: auto;
  background: white;
  /*box-shadow*/
  -webkit-box-shadow: 0 3px 3px rgba(0,0,0,.2), 0 0 0 2px #dddddd;
  -moz-box-shadow: 0 3px 3px rgba(0,0,0,.2), 0 0 0 2px #dddddd;
  box-shadow: 0 3px 3px rgba(0,0,0,.2), 0 0 0 2px #dddddd;
}
.checkbox-label:after {
  content: attr(data-off);
  display: block;
  position: absolute;
  z-index: 0;
  top: 0;
  left: -300px;
  padding: 10px;
  height: 100%;
  width: 300px;
  text-align: right;
  color: #bfbfbf;
  white-space: nowrap;
}
.ios-toggle:checked + .checkbox-label {
  /*box-shadow*/
  -webkit-box-shadow: inset 0 0 0 20px rgba(19,191,17,1), 0 0 0 2px rgba(19,191,17,1);
  -moz-box-shadow: inset 0 0 0 20px rgba(19,191,17,1), 0 0 0 2px rgba(19,191,17,1);
  box-shadow: inset 0 0 0 20px rgba(19,191,17,1), 0 0 0 2px rgba(19,191,17,1);
}
.ios-toggle:checked + .checkbox-label:before {
  left: calc(100% - 36px);
  /*box-shadow*/
  -webkit-box-shadow: 0 0 0 2px transparent, 0 3px 3px rgba(0,0,0,.3);
  -moz-box-shadow: 0 0 0 2px transparent, 0 3px 3px rgba(0,0,0,.3);
  box-shadow: 0 0 0 2px transparent, 0 3px 3px rgba(0,0,0,.3);
}
.ios-toggle:checked + .checkbox-label:after {
  content: attr(data-on);
  left: 60px;
  width: 36px;
}

Add the custom CSS to style the switch button whatever you like.

#checkbox1 + .checkbox-label {
  /*box-shadow*/
  -webkit-box-shadow: inset 0 0 0 0px rgba(19,191,17,1), 0 0 0 2px #dddddd;
  -moz-box-shadow: inset 0 0 0 0px rgba(19,191,17,1), 0 0 0 2px #dddddd;
  box-shadow: inset 0 0 0 0px rgba(19,191,17,1), 0 0 0 2px #dddddd;
}
#checkbox1:checked + .checkbox-label {
  /*box-shadow*/
  -webkit-box-shadow: inset 0 0 0 18px rgba(19,191,17,1), 0 0 0 2px rgba(19,191,17,1);
  -moz-box-shadow: inset 0 0 0 18px rgba(19,191,17,1), 0 0 0 2px rgba(19,191,17,1);
  box-shadow: inset 0 0 0 18px rgba(19,191,17,1), 0 0 0 2px rgba(19,191,17,1);
}
#checkbox1:checked + .checkbox-label:after { color: rgba(19,191,17,1); }