<div class="switch">
    <input id="checkbox1" class="look" type="checkbox">
    <label for="checkbox1"></label>
</div>

.switch {
position: relative;
}

.switch label {
width: 55px;
height: 23px;
background-color: #999;
position: absolute;
top: 0;
left: 0;
border-radius: 50px;
}

.switch input[type="checkbox"] {
visibility: hidden;
}

.switch label:after {
content: '';
width: 21px;
height: 21px;
border-radius: 50px;
position: absolute;
top: 1px;
left: 1px;
transition: 100ms;
background-color: white;
}

.switch .look:checked + label:after {
left: 32px;
}

.switch .look:checked + label {
background-color: lightsteelblue;
}