revert theme change

app.py

@@ -1,8 +1,8 @@
 import gradio as gr
+from gradio.themes import Default
 import pandas as pd
 import plotly.express as px
 import requests
-from gradio.themes.base import Default
 
 
 def get_financial_summary():
@@ -75,7 +75,7 @@ def restore_chat():
 # Frontend
 
 with gr.Blocks(
-    theme=Default(mode="light"),
+    theme=Default(),
     css="""
     #profile-pic-wrapper {
         width: 100px;