Specific css selector in `dash-table`


I use style_data={“whiteSpace”: “pre-line”} to break line into cell.

I would like if it is possible to apply specific css for example only on my first line in my cell like that
image ?

I have find a good solution but it doesn’t work for me.

Maybe with css attribue we can set this selector like
css=[ { "selector": ".dash-cell div.dash-cell-value::first-line", "rule": "font-family: Montserrat,Helvetica Neue,Arial,sans-serif;font-weight:300;font-size:2em;", } ]

Thanks for your helping.