diff --git a/js/main.js b/js/main.js
index a4622b8..c27ca41 100644
--- a/js/main.js
+++ b/js/main.js
@@ -99,3 +99,13 @@ window.addEventListener('keydown', function (e) {
         saveGame();
     }
 });
+
+// Save-on-pause: auto-save when tab is hidden or closed (#57 Mobile Polish)
+document.addEventListener('visibilitychange', function () {
+    if (document.hidden) {
+        saveGame();
+    }
+});
+window.addEventListener('beforeunload', function () {
+    saveGame();
+});