MyBB Community Forums

Ok I'm going to make a mini-site, not connected with the forum anyway. Just the design, like.. the same css, kk?

mydomain.com --> splash page sort of thing (with forums' css)
mydomain.com/forum --> forum here
mydomain.com/otherdir --> mini-site here (with forums' css)

Someone told me I had to put <link rel="stylesheet" href="CSS LINK HERE" /> in the head section. So what's the css url anyway?? Or can I also store the css somewhere else besides the forums url? Like upload it to /otherdir as style.css and then put the url to the css in that bit of code.
Same thing for the mydomain.com/

Any thoughts..? Will this work?

Cool, got it. Thanks for the link. Anyway I just uploaded the same css to the otherdir folder and used that bit of code in the html doc, and it's working. So yeah I sorted it out.