Update app.py

app.py

@@ -26,8 +26,8 @@ def add_sticky_header_css():
             width: 100%;
         }
 
-        /* Make Streamlit's BaseButton-header sticky */
-        [data-testid="stBaseButton-headerNoPadding"] {
+        /* Make Streamlit's stMainMenu sticky */
+        [data-testid="stMainMenu"] {
             position: fixed; 
             bottom: 0; 
             right: 0;