.animatedCheck {
    background-image: -webkit-linear-gradient(hsla(0,0%,0%,.1), hsla(0,0%,100%,.1)),
    -webkit-linear-gradient(left, #f66 50%, #6cf 50%);
    background-size: 100% 100%, 200% 100%;
    background-position: 0 0, 15px 0;
    border-radius: 25px;
    box-shadow: inset 0 1px 4px hsla(0,0%,0%,.5),
    inset 0 0 10px hsla(0,0%,0%,.5),
    0 0 0 1px hsla(0,0%,0%,.1),
    0 -1px 2px 2px hsla(0,0%,0%,.25),
    0 2px 2px 2px hsla(0,0%,100%,.75);
    cursor: pointer;
    height: 25px;
    width: 75px;
    -webkit-appearance: none;
    -webkit-transition: .25s;
}

.animatedCheck:after {
    background-color: #eee;
    background-image: -webkit-linear-gradient(hsla(0,0%,100%,.1), hsla(0,0%,0%,.1));
    border-radius: 25px;
    box-shadow: inset 0 1px 1px 1px hsla(0,0%,100%,1),
    inset 0 -1px 1px 1px hsla(0,0%,0%,.25),
    0 1px 3px 1px hsla(0,0%,0%,.5),
    0 0 2px hsla(0,0%,0%,.25);
    content: '';
    display: block;
    height: 25px;
    left: 0;
    position: relative;
    top: 0;
    width: 50px;
}

input[type="checkbox"]:checked {
    background-position: 0 0, 35px 0;
    padding-left: 25px;
    padding-right: 0;
}