Styles

public/app.js

@@ -122,6 +122,10 @@ function setupServiceButtons() {
             } catch(e) {
                 console.error('Event log failed', e);
             }
+            
+            document.querySelectorAll("nav button").forEach(b => b.classList.remove("active"));
+            btn.classList.add("active");
+
             openService(svc);
         };
         nav.appendChild(btn);