/* The switch - the box around the slider */
.switch {
    position: relative;
    display: inline-block;
    width: 52px;
    height: 28px;
    cursor: pointer;
}

.switch img {
    z-index: 0;
}

.switch #moon-img {
    position: absolute;
    left: .2em;
    top: .2em;
    height: 70%;
}

.switch #sun-img {
    position: absolute;
    right: .3em;
    top: .3em;
    height: 70%;
}

    /* Hide default HTML checkbox */
    .switch input {
        opacity: 0;
        width: 0;
        height: 0;
    }

/* The slider */
.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ddd;
    -webkit-transition: .15s;
    transition: .15s;
}

    .slider:before {
        position: absolute;
        content: "";
        height: 20px;
        width: 22px;
        left: 4px;
        bottom: 4px;
        background-color: white;
        -webkit-transition: .15s;
        transition: .15s;
        z-index: 10;
    }

input:checked + .slider {
    background-color: #31353D;
}

input:focus + .slider {
    box-shadow: 0 0 1px #31353D;
}

input:checked + .slider:before {
    -webkit-transform: translateX(22px);
    -ms-transform: translateX(22px);
    transform: translateX(22px);
}

/* Rounded sliders */
.slider.round {
    border-radius: 34px;
}

    .slider.round:before {
        border-radius: 50%;
    }