div label input {

}

.featureGroupName {
  width: 100%;
  text-align: center;
  color: white;

}

.ck-button {
    background-color: Transparent;
    margin:5px;
    border-radius:4px;
    border:1px solid #D0D0D0;
    overflow: auto;
    float: left;
    color: white;
    width: 35px;
    font-weight: normal;
    font-size: 80%;
}

.ck-button:hover {
    margin:5px;
    background-color:#EFEFEF;
    border-radius:4px;
    border:1px solid red;
    overflow: auto;
    float:left;
    color:red;
    font-weight: normal;
}

.ck-button > span {
  z-index: -2;
}

.ck-button label {
    display:block;
    float:center;
    width:3.0em;
    margin: 1px 1em 0 auto;
}

.ck-button label span {
    font-weight: normal;
    text-align:center;
    padding:0px 0px;

}


.ck-button label input {
    position:absolute;
}

.ck-button input:checked + span {
    font-weight: normal;
    color:#fff;
    color:red;
    border:1px solid red;
}