I register the elementary css code in the file /themes/classic/assets/css/custom.css, save it, and nothing happens on the site. This file is connected in HTML and when I go to it from the browser, I see that it is empty, that my code is not there.
The same goes for the /themes/classic/assets/css/theme.css file. If its contents are completely removed, nothing will happen.
But if you rename it in _theme.css, then PS will not find it and, accordingly, it will not be included in the HTML code.
All caching, all compilation, etc. has been disabled in the admin panel. In the theme directory, the cache directory is empty.
Can you please tell me how to edit and supplement the CSS code in PS 1.7 version?