[type="checkbox"]:not(:checked),
[type="checkbox"]:checked {
  position: absolute;
  left: -9999px;
}
[type="checkbox"]:not(:checked) + label,
[type="checkbox"]:checked + label {
  position: relative;
  padding-left: 75px;
  cursor: pointer;
}
[type="checkbox"]:not(:checked) + label:before,
[type="checkbox"]:checked + label:before,
[type="checkbox"]:not(:checked) + label:after,
[type="checkbox"]:checked + label:after {
  content: '';
  position: absolute;
}
[type="checkbox"]:not(:checked) + label:before,
[type="checkbox"]:checked + label:before {
  left:0; top: -3px;
  width: 65px; height: 30px;
  background: #FFFFFF;
  border-radius: 15px;
  transition: background-color .2s;
}
[type="checkbox"]:not(:checked) + label:after,
[type="checkbox"]:checked + label:after {
  width: 20px; height: 20px;
  transition: all .2s;
  border-radius: 50%;
  background: #A8A8A8;
  top: 2px; left: 5px;
}

/* on checked */
[type="checkbox"]:checked + label:before {
  background:#F5F5F5; 
}
[type="checkbox"]:checked + label:after {
  background: #B3B3B3;
  top: 2px; left: 40px;
}

[type="checkbox"]:checked + label .ui,
[type="checkbox"]:not(:checked) + label .ui:before,
[type="checkbox"]:checked + label .ui:after {
  position: absolute;
  left: 6px;
  width: 65px;
  border-radius: 15px;
  font-size: 14px;
  font-weight: bold;
  line-height: 20px;
  transition: all .2s;
}
[type="checkbox"]:not(:checked) + label .ui:before {
  content: "NO";
  left: 32px
}
[type="checkbox"]:checked + label .ui:after {
  content: "SI";
  color: #000000;
}
[type="checkbox"]:focus + label:before {
  border: 1px dashed #000000;
  box-sizing: border-box;
  margin-top: -1px;
}

/* Useless styles, just for demo styles */