Reply To: Custom CSS not being recognised
It is best not to make changes to the bbPress core files because they will be lost when you update. The same for your theme files unless it’s already a custom theme. The best way is with a Child Theme.
In your theme folder (or preferably, child theme), create a subfolder called css with a file called bbpress.css so you have /wp-content/themes/%your-theme%/css/bbpress.css
The last rule defined overrides any previous, conflicting rules so this file will make your styles the last rules. See if it works then and if it still doesn’t then check for what is overwriting it – because something is.
(Specificity is usually the reason why your CSS doesn’t work the way you think it should. If there are styles in your code that are more specific, they will win. There is a good article on specificity at Smashing Mag.)
