.switch {
    position: relative;
    display: inline-block;
    width: 45px;
    height: 20px;
    bottom: 1px;
}

    .switch input {
        opacity: 0;
        width: 0;
        height: 0;
    }

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition-property: transform;
    transition-duration: .5s;
}

    .slider::before {
        position: absolute;
        content: "";
        height: 15px;
        width: 15px;
        left: 2px;
        bottom: 2.3px;
        background-color: white;
        transition-property: transform;
        transition-duration: .5s;
    }

@-moz-document url-prefix() {
    .slider::before;

{
    bottom: 2.7px;
}

}

input:checked + .slider {
    background-color: #2196F3;
}

input:focus + .slider {
    box-shadow: 0 0 1px #2196F3;
}

input:checked + .slider::before {
    -webkit-transform: translateX(25px);
    -ms-transform: translateX(25px);
    transform: translateX(25px);
}

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

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