What is external Style Sheet? How to link?

[hoangvu]

I am building a Big website that will have many pages and folders. I have 1 style sheet.

How do I add the style sheet to "ALL" of these folders? I didnt have this problem before I started to put the pages in SEPARATE folders. Now that each page has its own folder it no longer reads my style sheet unless its in the SAME folder.

 

[Darius]

It is not wise to have too many style sheets.
You just link from your page to the style sheet, like
<link rel='stylesheet' type='text/css' href='/files/main_style.css?1362855908' /> in head section of html code.
You can create main css sheet and link it to all your pages.
As well, you can create small local additional sheets linked to local pages.
The possibilities are limitless.