Update src/streamlit_app.py

src/streamlit_app.py

@@ -2,7 +2,9 @@ import streamlit as st
 import pandas as pd
 import plotly.express as px
 
-with open("custom.css") as f:
+from pathlib import Path
+
+with open(Path(__file__).parent / "custom.css") as f:
     st.markdown(f"<style>{f.read()}</style>", unsafe_allow_html=True)
 
 st.set_page_config(layout="wide")