diff --git a/frontend/app.js b/frontend/app.js
index bf16e44..92b150c 100644
--- a/frontend/app.js
+++ b/frontend/app.js
@@ -2043,9 +2043,10 @@ document.addEventListener('click', async (e) => {
 // --- Video expand/collapse (double-click to toggle fullscreen-like view) ---
 // --- Image lightbox (click to open full-size popup) ---
 document.addEventListener('click', (e) => {
-    // Close lightbox on click
-    const lb = e.target.closest('.image-lightbox');
-    if (lb) { lb.remove(); return; }
+    // Close lightbox on click — overlay background or image inside it (not form content)
+    if (e.target.classList.contains('image-lightbox')) { e.target.remove(); return; }
+    const lbParent = e.target.closest('.image-lightbox');
+    if (lbParent && e.target.tagName === 'IMG') { lbParent.remove(); return; }
 
     const img = e.target.closest('img.post-image');
     if (!img) return;