so its been long time since I've played around with Zen Cart last time was 1.5.6 I believe which is since long gone from the server. Decided to try my hand at installing a fresh version after getting an updated email from Zen Cart for 2.2.1.

Install went fine everything looks good using the demo products etc. I just read through all four of the pages in this thread to see if I can understand the overrides system and I am a bit fuzzy.

I realize that if I upload all the classic_responsive themes css, language, header etc files into the includes/templates/ my custom template folder that I can view my page. But what if I wanted to only create a header css, language files and add just the modifications that I want to those files without keeping all the other lines of code from the classic_responsive theme, how would I do that.

I have tried it and the store front fell apart with no css in my overrides includes/templates/custom_theme/css but the changes I made to the logo etc.

Am I to understand that the overrides system won't work without the whole file from the classic_responsive theme being copied into my custom overrides theme (which I did afterwards and the site was normal again) and changes have to made to that file while keeping all the existing code or should I be able to only have my code modifications in the overrides my custom template by themselves and the rest of the code is called from the default template? If so, it is not working for me.

I have created includes/templates/custom_theme/template_info.php using the full specs example from https://docs.zen-cart.com/user/template/template_info/ and chose the custom theme in admin as the default as per the instructions.

Thanks in advance. I wasn't sure if I should create a new thread as this one is so old but figured this would show I've done my due diligence.

Php 8.2
mysql 8.0.40
Apache 2.4.62
Alma Linux v8.10.0 STANDARD
Architecture x86_64
Kernel Version 4.18.0-477.27.2.el8_8.x86_64