.faq-tab-content {
    display: none;
}
.faq-tab-content.active {
    display: block;
}
/* Basis tab labels */
.faq_groups label {
    padding: 10px 15px;
    background: #f2f2f2;
    color: #222;
    display: inline-block;
    cursor: pointer;
    border-radius: 6px 6px 0 0;
    margin-right: 5px;
}

/* Verberg radio buttons */
.faq_groups input[type="radio"] {
    display: none;
}

/* Actieve tab */
.faq_groups input[type="radio"]:checked + label {
    background: #222;
    color: #fff;
}