Removed nested background CSS styling

app.py

@@ -572,7 +572,7 @@ def update_use_embeddings(widget, state):
         return state
 
 
-with gr.Blocks(css=".gradio-container {background-color: #090c17} #gr-component {background-color: #202937, background-color: #202937, border-color: #384253, color: #bcc0c6}") as block:
+with gr.Blocks(css=".gradio-container {background-color: #090c17} #gr-component {background-color: #202937, border-color: #384253, color: #bcc0c6}") as block:
     llm_state = gr.State()
     history_state = gr.State()
     chain_state = gr.State()