How can I change Navigation Sidebar font-size?

Using Streamlit
,
1

Hello, I want to change navigation Sidebar font-size.
(:house:Home, :bar_chart:Graph, :medal_military:Activity area)
so I write down code like below, but it isn’t work. Could you help me? Thank you.
(I use python 3.8, streamlit 1.40.0 version)

if name == “main”:

 pages = {
    "🏠Home" : [st.Page("home.py", title = "Home")],
    "📊Graph" : [
            st.Page("contents/graph.py", title = "Graph", icon = "◽"),
            ],
    "🎖️Activity" : [
                           st.Page("contents/activity_1.py", title = "Activity_1", icon = "◽"),
                           st.Page("contents/activity_2.py", title = "Activity_2", icon = "◽"),
                           st.Page("contents/activity_3.py", title = "Activity_3", icon = "◽"),
                           ]        
}

pg = st.navigation(pages)

pg.run()

st.markdown(
    """
    <style>
    div[data-testid="stSidebarNav"] > ul[data-testid="stSidebarNavItems"] > header[data-testid="stNavSectionHeader"]> div p{font-size: 20px !important;}
    </style>
    """,    unsafe_allow_html=True
)