.radio-toolbar input[type="radio"] {
    display:none; 
}

.radio-toolbar label {
    display:inline-block;
    background-color:#ddd;
    padding:4px 11px;
    font-family:Arial;
    font-size:16px;
}

.radio-toolbar input[type="radio"]:checked + label { 
    background-color:#bbb;
}