@axew3, just an update that could be interesting for your future support requests. There really was a problem with the stylesheets compilation. The theme installed, like many PHPbb 3.1 styles, use .scss stylesheets instead of usual .css files.
After editing any .scss file you need to recompile it. Unfortunately that process requires external tools because there is no decent SASS compilers for PHP.
Now this process is easier! I present Sass compiler for phpBB!
Sass compiler is an extension for phpBB 3.1. It adds new tab to admin control panel where you can see all styles that use .scss files and link to recompile stylesheet.
So I add this compiler and use it to compile other changes and they was effective immediately. So checking if a support request as a theme that uses .scss stylesheets could save you a lot of consuming time.
References:
– https://www.artodia.com/threads/sass-compiler-for-phpbb-3-1.2186/
– https://www.artodia.com/phpbb-31-tutorials/compile-theme/
Note that these themes were officially approved by phpbb and are on the PHPbb style gallery.
Best regards
Alex