diff --git a/js/ui/chart.js b/js/ui/chart.js
index 3a5978c..bda3a10 100644
--- a/js/ui/chart.js
+++ b/js/ui/chart.js
@@ -509,11 +509,17 @@ constructor() {
                 settingsPopup.classList.toggle('hidden');
             });
             
-            document.addEventListener('click', (e) => {
-                if (!settingsPopup.contains(e.target) && e.target !== btnSettings) {
+            document.addEventListener('click', closeSettingsPopup);
+            document.addEventListener('touchstart', closeSettingsPopup, { passive: true });
+            
+            function closeSettingsPopup(e) {
+                const isInside = settingsPopup.contains(e.target) || e.target === btnSettings;
+                const isSettingsButton = e.target.closest('#btnSettings');
+                
+                if (!isInside && !isSettingsButton) {
                     settingsPopup.classList.add('hidden');
                 }
-            });
+            }
         }
         
         // Initialize state from storage