In which directory to save the style sheets of non-main pages and how to correctly set the path to these tables (Wordpress)?

Question

CMS

There is a simple site with several pages. You need to "pull" it on Wordpress. How to make all pages have their own styles? That is, each page referred to its own style sheet. In which directory should these tables be saved and how to correctly set the path to these tables? I'm new to this. So far, only index.php has been connected to the main page of the template.