What should I change in .htaccess to load images based on directories from RewriteRule?

Question

htaccess

Page URL:
site.com/material/title-name
All files on this page are connected in this way:
href="style.css"
src="images/i.jpg"
and so on.
Since the /material/ directory is present in the URL, all included files must be in this directory:
material/images/i.jpg
material/style.css
You can fix the situation by adding a slash before the address of the included file, but the site editor does not add this slash , and if you add it manually, the editor removes it. That's why you need a solution with htaccess ..