Fix issue with unrecognized keyword

app.py

@@ -301,7 +301,7 @@ css = """
 }
 """
 
-with gr.Blocks(css=css) as demo:
+with gr.Blocks() as demo:
     with gr.Column(elem_id="col-container"):
         gr.Markdown(
             """# FLUX.2 [dev] Text-to-Image
@@ -413,4 +413,4 @@ FLUX.2 [dev] is a 32B model rectified flow capable of generating, editing and co
     )
 
 if __name__ == "__main__":
-    demo.launch()
+    demo.launch(css=css)