Update style.css

style.css

@@ -1,11 +1,12 @@
 /* --- Target the Gradio app wrapper for backgrounds --- */
+
 gradio-app,
 .gradio-app,
 .main,
 #app,
 [data-testid="app"] {
   background-color: rgb(40,9,109) !important;
-  background-image: url('Python_R.jpg') !important;
+  background-image: url("/file=Python_R.jpg") !important;
   background-position: center top !important;
   background-repeat: no-repeat !important;
   background-size: cover !important;