.checkbox-menu li label {
    display: block;
    padding: 3px 10px;
    clear: both;
    font-weight: normal;
    line-height: 1.42857143;
    color: #333;
    white-space: nowrap;
    margin:0;
    transition: background-color .4s ease;
}
.checkbox-menu li input {
    margin: 0px 5px;
    top: 2px;
    position: relative;
}

.checkbox-menu li.active label {
    background-color: #cbcbff;
    font-weight:bold;
}

.checkbox-menu li label:hover,
.checkbox-menu li label:focus {
    background-color: #f5f5f5;
}

.checkbox-menu li.active label:hover,
.checkbox-menu li.active label:focus {
    background-color: #b8b8ff;
}