Toggle Switch On / OFF Button in Pure CSS

 body {
  background-color: #d3a977;
  background: url(http://www.inkspilldesign.com/demo/wood-tile-background.jpg);
}
 
.container {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  width: 100vw;
}
 
#group {
  position: relative;
  margin: 60px auto;
  padding: 20px 20px 23px;
  border: 1px dashed rgba(0, 0, 0, .5);
  background-image: linear-gradient(top, rgba(255, 255, 255, .1), rgba(0, 0, 0, .1));
  background-color: #555;
  width: 340px;
  border-radius: 5px;
  box-shadow: 0 0 0 3px #555, -2px 3px 0px 2px rgba(0, 0, 0, .6), 2px -2px 0px 2px rgba(255, 255, 255, .6), -5px 5px 20px 0px rgba(0, 0, 0, .6);
}
 
#group:after {
  content: " ";
  position: absolute;
  z-index: 1;
  top: 0px;
  left: 0px;
  right: 0px;
  bottom: 0px;
  border-radius: 5px;
  border: 1px dashed #fff;
}
 
.switch {
  position: relative;
  border: 0;
  padding: 0;
  width: 300px;
  font-family: helvetica;
  font-weight: bold;
  font-size: 22px;
  color: #222;
  text-shadow: 0 1px 0 rgba(255, 255, 255, .3);
}
 
.switch legend {
  float: left;
  width: 40%;
  padding: 7px 10% 3px 0;
  text-align: right;
}
 
.switch input {
  position: absolute;
  opacity: 0;
}
 
.switch legend:after {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  z-index: 0;
  width: 50%;
  height: 100%;
  padding: 2px;
  background-color: #222;
  border-radius: 3px;
  box-shadow: inset -1px 2px 5px rgba(0, 0, 0, .8), 0 1px 0 rgba(255, 255, 255, .2);
}
 
.switch label {
  position: relative;
  z-index: 2;
  float: left;
  width: 25%;
  margin-top: 2px;
  padding: 5px 0 3px 0;
  text-align: center;
  color: #64676b;
  text-shadow: 0 1px 0 #000;
  cursor: pointer;
  transition: color 0s ease .1s;
}
 
.switch input:checked + label {
  color: #2d592a;
  text-shadow: 0 1px 0 rgba(255, 255, 255, .5);
}
 
.switch input:focus + label {
  outline: none;
}
 
.switch .switch-button {
  clear: both;
  position: absolute;
  top: -1px;
  left: 50%;
  z-index: 1;
  width: 25%;
  height: 100%;
  margin: 2px;
  background-color: #70c66b;
  background-image: linear-gradient(top, rgba(255, 255, 255, .2), rgba(0, 0, 0, 0));
  border-radius: 3px;
  border: 1px dashed rgba(0, 0, 0, .3);
  box-shadow: 0 0 0 3px #70c66b, -2px 3px 5px #000;
  transition: all .3s ease-out;
}
 
.switch .switch-button:after {
  content: " ";
  position: absolute;
  z-index: 1;
  top: 0px;
  left: 0px;
  right: 0px;
  bottom: 0px;
  border-radius: 3px;
  border: 1px dashed #fff;
}
 
.switch input:last-of-type:checked ~ .switch-button {
  left: 75%;
}