My published site is not formatted correctly

I have my site Theme 01 online using the files I uploaded, however, the way it is shown is not how it appears on my laptop. The code is the same, so what is wrong here? Have I missed something - I have checked the files and they are the same as the original.

css style files should have a .css extension.

there is no store-front repo, you’ve already deleted it, right?

but maybe your problem is how to deploy correctly a web page through GitHub Pages, so you might want to try the official tutorial of GitHub for this,