diff --git a/chat-theme/openwebui-custom.css b/chat-theme/openwebui-custom.css
index 533de18..762c1bb 100644
--- a/chat-theme/openwebui-custom.css
+++ b/chat-theme/openwebui-custom.css
@@ -45,6 +45,12 @@ html, body {
 html:not(.dark) body {
   background-color: #faf8f5 !important;
 }
+/* App shell + main content pane: Open WebUI paints these with its own opaque
+   bg (bg-white / bg-gray-900) — the sidebar alone isn't the whole story. */
+html:not(.dark) div[class*="h-screen"][class*="bg-white"],
+html:not(.dark) div[class*="min-h-[100dvh]"][class*="bg-white"] {
+  background-color: #faf8f5 !important;
+}
 html:not(.dark) #sidebar {
   background: linear-gradient(180deg, #f6f3ee 0%, #f1ede5 100%) !important;
   border-right: 1px solid #e4e0d8 !important;
@@ -57,6 +63,10 @@ html:not(.dark) .markdown-prose {
 html.dark body {
   background-color: #1f241b !important;
 }
+html.dark div[class*="h-screen"][class*="bg-gray-900"],
+html.dark div[class*="min-h-[100dvh]"][class*="bg-gray-900"] {
+  background-color: #1f241b !important;
+}
 html.dark #sidebar {
   background: linear-gradient(180deg, #262b21 0%, #1f241b 100%) !important;
   border-right: 1px solid #3e4636 !important;