Update app.py

app.py

@@ -145,7 +145,7 @@ def layout(*args):
 
     style_hr = styles(
         display="block",
-        margin=px(4, 4, "auto", "auto"),
+        margin=px(4, 4, 8, 0),
         border_style="inset",
         border_width=px(2)
     )