556:.map-filter-btn {
573:.map-filter-btn:hover { background: var(--eigis-teal-light); border-color: var(--eigis-teal); }
574:.map-filter-btn.active { background: var(--eigis-teal-light); border-color: var(--eigis-teal); color: var(--eigis-teal); }
1247:            <button class="map-filter-btn active" onclick="filterMap('all')" id="filterAll">
1250:            <button class="map-filter-btn" onclick="filterMap('surface')" id="filterSurface">
1253:            <button class="map-filter-btn" onclick="filterMap('structural')" id="filterStructural">
1256:            <button class="map-filter-btn" onclick="filterMap('geothermal')" id="filterGeothermal">
2470:  document.querySelectorAll('.map-filter-btn').forEach(b => b.classList.remove('active'));
2472:    const btn = document.querySelector('.map-filter-btn[data-theme="'+theme+'"]');
2794:  document.querySelectorAll('.map-filter-btn').forEach(btn => {