Yep, all that IIS or apache does is interpret a kind of html that only it
understands, ie IIS understands asp and apache understands php.
CSS is a html standard that doesn't rely upon a specific server like php or
So, if you go for asp for example (as you seem to ask about IIS), you will add
all of your asp code to your page to query your database, the server software
then reads the asp code and turns it in to html before it even leaves the
server and delivers it to your screen. So, on that basis, CSS being html will
work on any format be it asp, php, coldfusion, domino etc