.knobs,
.layer {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
}

.button {
    position: relative;
    top: 30%;
    width: 74px;
    height: 36px;
    margin: -20px auto 0 auto;
    overflow: hidden;
}

    .button.r,
    .button.r .layer {
        border-radius: 100px;
    }

    .button.b2 {
        border-radius: 2px;
    }

.checkbox {
    position: relative;
    width: 100%;
    height: 100%;
    padding: 0;
    margin: 0;
    opacity: 0;
    cursor: pointer;
    z-index: 3;
}

.knobs {
    z-index: 2;
}

.layer {
    width: 100%;
    background-color: #ebf7fc;
    transition: 0.3s ease all;
    z-index: 1;
}
/* Button 10 */
#button-10 .knobs:before,
#button-10 .knobs:after,
#button-10 .knobs span {
    position: absolute;
    top: 4px;
    width: 28px;
    height: 28px;
    font-size: 10px;
    font-weight: bold;
    text-align: center;
    line-height: 1;
    padding: 9px 4px;
    border-radius: 2px;
    transition: 0.3s ease all;
}

#button-10 .knobs:before {
    content: "";
    left: 4px;
    background-color: #03a9f4;
}

#button-10 .knobs:after {
    content: "NP";
    right: 4px;
    color: #4e4e4e;
}

#button-10 .knobs span {
    display: inline-block;
    left: 4px;
    color: #fff;
    z-index: 1;
}

#button-10 .checkbox:checked + .knobs span {
    color: #4e4e4e;
}

#button-10 .checkbox:checked + .knobs:before {
    left: 42px;
    background-color: #f44336;
}

#button-10 .checkbox:checked + .knobs:after {
    color: #fff;
}

#button-10 .checkbox:checked ~ .layer {
    background-color: #fcebeb;
}