diff --git a/main.py b/main.py
index c34d720..6aa1d67 100644
--- a/main.py
+++ b/main.py
@@ -1,6 +1,6 @@
 import os
 from fastapi import FastAPI, Request, Depends, HTTPException
-from starlette.middleware.sessions import SessionMiddleware
+from starlette.middleware.sessions import SessionMiddleware 
 from starlette.staticfiles import StaticFiles 
 from starlette.responses import FileResponse, RedirectResponse
 from fastapi.templating import Jinja2Templates
@@ -11,6 +11,7 @@ import models
 from database import engine
 import auth # Import the new auth module
 import schemas
+from starlette.responses import Response
 from config import settings # Import settings to get the secret key
 
 # --- Absolute Path Configuration ---
@@ -100,7 +101,7 @@ async def read_overlay(request: Request, user_id: int, theme_override: str = Non
         # Use a generic overlay template that will link to the dynamic CSS
         return templates.TemplateResponse("overlay-custom.html", {"request": request, "theme_id": theme.id})
 
-    return templates.TemplateResponse(f"overlay-{theme}.html", {"request": request})
+    return templates.TemplateResponse(f"overlay-{theme_name}.html", {"request": request})
 
 @app.post("/api/settings")
 async def update_settings(settings_data: schemas.SettingsUpdate, request: Request, db: Session = Depends(auth.get_db)):