Missing information about standard streamlit css styles and effect of custom themes

[mauermbq]

Link to doc page in question (if any):
Referring to the following threads, there are issues with usage of styles for instance with
https://discuss.streamlit.io/t/datepicker-css-style/55392/1
https://discuss.streamlit.io/t/formatting-date-picker/51927

Name of the Streamlit feature whose docs need improvement:
stylable_container --> from streamlit_extras
st.markup("<style string>", unsafe_allow_html=True)

What you think the docs should say:
The effects of themes on styles
Where are css standard styles documented, including style names that might needed to be overwritten (see date_input example)

[sfc-gh-dmatthews]

Hi @mauermbq,

CSS styling isn't "officially" supported and the particular classes and IDs you might hook onto may change at any time. However, CSS styling is a popular request. I'll leave this open since there may be room to improve this.

Certainly, enhancing the theming docs overall is a reasonable request. 😄 Improved visual customization is currently on the roadmap for next quarter.