diff --git a/public/customize.js b/public/customize.js
index 2d656fb..f7fe5cf 100644
--- a/public/customize.js
+++ b/public/customize.js
@@ -223,6 +223,13 @@
     for (var key in THEME_CSS_MAP) {
       if (t[key]) document.documentElement.style.setProperty(THEME_CSS_MAP[key], t[key]);
     }
+    // Force nav bar to re-render gradient (some browsers cache gradient paint)
+    var nav = document.querySelector('.top-nav');
+    if (nav) {
+      nav.style.background = 'none';
+      void nav.offsetHeight; // force reflow
+      nav.style.background = '';
+    }
   }
 
   function resetPreview() {
diff --git a/public/index.html b/public/index.html
index 9459e54..259c9cc 100644
--- a/public/index.html
+++ b/public/index.html
@@ -101,6 +101,6 @@
   <script src="observer-detail.js?v=1774219440" onerror="console.error('Failed to load:', this.src)"></script>
   <script src="node-analytics.js?v=1774126708" onerror="console.error('Failed to load:', this.src)"></script>
   <script src="perf.js?v=1773985649" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="customize.js?v=1774231701" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="customize.js?v=1774232397" onerror="console.error('Failed to load:', this.src)"></script>
 </body>
 </html>