How to add folders like CDD, images etc. ?

Hi all,

my web site is located on a Raspberry Pi zero running raspbian. The web server is appache 2, I installed CodeIgniter under just below var, so above www.

I tried inserting a reference to a style sheet, a .CSS file, but that does not work. Looking at the generated HTML code, it looks like it needs to have the CSS files below http://mydomain.com  .

Does that mean the style sheet needs to be available from within the browser who runs the web site either:

• from the web site itself
  
• or inside the page itself ?
  

Is there some way I can have the styles outside the header file (view) and reference it from the header ?

Thanks