.prinz-collapsible {

}
.prinz-collapsible-toggle {
    width: 100%;
    color: #111;
    display: block;
    background-color: #fff;
    border: 1px solid #555;
}
.prinz-collapsible-toggle.active {
    color: #fff;
    background-color: #d32229;
}
.prinz-collapsible-content {
    display: none;
}