diff --git a/client/src/pages/TripPlannerPage.tsx b/client/src/pages/TripPlannerPage.tsx
index 71725a4..4bd511b 100644
--- a/client/src/pages/TripPlannerPage.tsx
+++ b/client/src/pages/TripPlannerPage.tsx
@@ -694,8 +694,8 @@ export default function TripPlannerPage(): React.ReactElement | null {
                   } catch {}
                 }}
                 onUpdatePlace={async (placeId, data) => { try { await tripActions.updatePlace(tripId, placeId, data) } catch (err: unknown) { toast.error(err instanceof Error ? err.message : 'Unknown error') } }}
-                leftWidth={leftCollapsed ? 0 : leftWidth}
-                rightWidth={rightCollapsed ? 0 : rightWidth}
+                leftWidth={(isMobile || window.innerWidth < 900) ? 0 : (leftCollapsed ? 0 : leftWidth)}
+                rightWidth={(isMobile || window.innerWidth < 900) ? 0 : (rightCollapsed ? 0 : rightWidth)}
               />
             )}