Update app_enhanced.py

app_enhanced.py

@@ -340,9 +340,11 @@ INDEX_HTML = '''
     .comic-page { background: white; width: 600px; height: 400px; box-shadow: 0 4px 10px rgba(0,0,0,0.1); position: relative; overflow: hidden; border: 2px solid #000; padding: 0; }
     
     /* === 5-PANEL TEMPLATE (2 TOP, 3 BOTTOM) === */
-    .comic-grid { width: 100%; height: 100%; position: relative; background: #000; }
+    /* Background White for White Gaps */
+    .comic-grid { width: 100%; height: 100%; position: relative; background: #ffffff; }
     
-    .panel { position: absolute; overflow: hidden; background: #000; cursor: pointer; border: 0; }
+    /* Panel Background White so 'contain' shows white bars, not black */
+    .panel { position: absolute; overflow: hidden; background: #ffffff; cursor: pointer; border: 0; }
     .panel.selected { z-index: 20; }
     .panel.selected img { outline: 3px solid #2196F3; outline-offset: -3px; }