Update app.py

app.py

@@ -220,7 +220,7 @@ class LangChain_Document_QA:
       history_state.clear()
 
     def gradio_interface(self):
-      with gr.Blocks(css="style.css",theme='JohnSmith9982/small_and_pretty') as demo:
+      with gr.Blocks(css="style.css",theme='freddyaboulton/test-blue') as demo:
           with gr.Row():
             gr.HTML("""<center><img class="image" src="https://www.syrahealth.com/images/SyraHealth_Logo_Dark.svg" alt="Image" width="210" height="210"></center>
             """)