.switch{position:relative;display:inline-block;width:40px;height:21px}.switch input{opacity:0;width:0;height:0}.slider{position:absolute;cursor:pointer;top:0;left:0;right:0;bottom:0;background-color:#ccc;-webkit-transition:.4s;transition:.4s}.slider:before{position:absolute;content:"";height:13px;width:13px;left:3px;bottom:4px;background-color:#fff;-webkit-transition:.4s;transition:.4s}input:checked+.slider{background-color:#2196f3}input:focus+.slider{box-shadow:0 0 1px #2196f3}input:checked+.slider:before{-webkit-transform:translateX(21px);-ms-transform:translateX(21px);transform:translateX(21px)}.slider.round{border-radius:34px}.slider.round:before{border-radius:50%}