Topic on Extension talk:FlaggedRevs

i answered questions

Hi there! how can I change the buttons and inputs styles on the local wiki?

Yes, using CSS

Hi @Krzysiek 123456789 I know, but where is the MediaWiki official CSS files? can you show me?

You can simply override them with CSS for a single user or a global CSS file for a wiki(MediaWiki:Common.css). For security reasons it is not possible to modify the default styles directly. HERE you can learn more.