.external-ref-search-widget {
    background: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 4px;
    padding: 15px;
    margin-bottom: 20px;
}
.external-ref-search-widget .form-control {
    margin-bottom: 10px;
}
.external-ref-search-widget .examples {
    font-size: 0.9em;
    color: #6c757d;
    margin-top: 10px;
    font-style: italic;
}
@media (min-width: 768px) {
    .external-ref-search-widget .input-group {
        display: flex;
        flex-wrap: wrap;
    }
    .external-ref-search-widget .form-control {
        flex: 1;
        margin-right: 10px;
        margin-bottom: 0;
    }
}