Navbar text - how to hide/remove

[BBNZowner]

Hi all, as part of changing up my forums appearance I am using image based icons for the navbar tabs (all of which will be compressed, before anyone worries xD ) and I want to know which peice of code in the CSS I should delete / comment out to hide the default text?

Edit: nevermind, realised the easiest way to do this would be by just setting the text size to 0