Websites embedded within CSS

[Qaideth]

A friend of mine had a PHP site built a few years ago, but the site was quite slow. I decided to look into the CSS and JS files using Chrome's code coverage feature. When I inspected the site, I came across something interesting. There are many embedded styles on the site - where is it pulling these from? Very intriguing. I downloaded the site to my local machine and opened it in Visual Studio Code. I tried searching within the project folder using Ctrl + Shift + F, but couldn't find anything. Where could it be pulling these URLs from? When I searched for the word "root" in the project folder, I found a few style files, but it seems like it's not pulling from any specific file.