Headers conflict

Hi everyone.

I’m developing a theme that uses ThemeToolkit, and a PHP that behaves as a CSS (with its correspondent headers('content-type: text-css')). The problem is that when the CSS headers are sent, I constantly get the “headers already sent” error, from functions.php (which has the ThemeToolkit functions), but the style is applied correctly.

In the other hand, when the other headers are sent correctly (removing some line breaks below code on function.php), the style of my theme goes awry. What should I do? Did I make myself clear? (don’t think so ?? )

Thanks in advance for your responses.