Struggling to understand how shared layouts and references are picked up and shared scross pages

I have a blazor server project. I would like to knowA) how the shared layout folder worksB) now css files and js files are shared across pages.I can see in my project the shared layout but what I want to kow specifically is how is Blazor able to pick up shared resources.

I cannot see any reference calling them in my razor pages.

Please help? I am a bit lost