Use path relative to file

src/shared_page.py

@@ -1,3 +1,4 @@
+import os
 import streamlit as st
 
 from page_selector import remove_seasonal_pages
@@ -12,4 +13,4 @@ def local_css(file_name):
 def common_page_config():
     get_authorization_button()
     remove_seasonal_pages()
-    local_css("style.css")
+    local_css(os.path.join(os.path.dirname(__file__), "style.css"))