style.css

#orderbysemestercheckbox_id {
    margin-right: 7px;
}

.idSarchingLabel {
    display: none;
}

.hshcoursesearchlistitem .activeCourseSearch{
    z-index: 1;
}

.hshcoursesearchlistitem.activeCourseSearch a{
    color: white;
}

/*
 * Aus Bootstrap 4 (Einheitliches Design wird "erzwungen", auch in Bootstrap 3 Themes)
 */
.list-group-item.active, .list-group-item.active:focus, .list-group-item.active:hover {
    z-index: 1;
    color: #fff;
    text-decoration: none;
    background-color: #00acdf;
    border-color: #00acdf;
}

.list-group-item:first-child {
    border-top-right-radius: .25rem;
    border-top-left-radius: .25rem;
}

.list-group-item {
    position: relative;
    display: block;
    padding: 0.75rem 1.25rem;
    margin-bottom: -1px;
    background-color: #fff;
    border: 1px solid #ddd;
}

.list-group {
    padding-left: 0;
    margin-left: 0;
    margin-top: 10px;
    margin-bottom: 0;
}