reduce unused css

Hi,

Litespeed combines my internal css so it doesn’t load several css files. However, if one file uses only 2% of the css (for instance, font-awesome, I’m maybe using 1% of the css) it loads it all anyway. Therefore, I have the main combined css file as heavy as 1MB but 88% is unused regarding “coverage” tab in chrome inspector.

Is there any way for litespeed to leave outside the unused css?

Thanks.