&[ie] {
    width: 46px;
    height: 24px;
    margin: 0;
    border-radius: 12px;
    cursor: pointer;
    opacity: 0;
    z-index: 1;
    position: relative;
    vertical-align: middle;
    margin-right: -46px;
}

&[ie]+label,
&:not([ie]) {
    display: inline-block;
    width: 46px;
    margin: 0;
    height: 24px;
    border-radius: 12px;
    border: none;
    position: relative;
    outline: none;
    cursor: pointer;
    vertical-align: middle;
    background-color: #ccc;
    -webkit-appearance: none;
    -moz-appearance: none;
    -ms-appearance: none;
    -o-appearance: none;
    appearance: none;
    &:before {
        background-color: #28c;
        transition: all .1s ease-out;
        left: 50%;
        top: 50%;
        right: 50%;
        bottom: 50%;
        content: "";
        position: absolute;
        border-radius: inherit;
    }
    &:after {
        border-radius: 11px;
        content: "";
        display: block;
        margin-left: -22px;
        left: 50%;
        width: 22px;
        height: 22px;
        top: 50%;
        margin-top: -11px;
        background-color: #fff;
        box-shadow: 0 0 20px -6px rgba(0, 0, 0, .3);
        transition: margin-left .2s ease-out, width .2s ease-out;
        position: absolute;
    }
    &:active:after {
        width: 32px;
    }
}

&[ie]:checked+label,
&:not([ie]):checked {
    &:before {
        left: 0;
        top: 0;
        right: 0;
        bottom: 0;
    }
    &:after {
        margin-left: 0;
    }
    &:active:after {
        margin-left: -10px;
    }
}