Recent content by canister

i download a css file or zip from the internet for my web site.. the problem i am having is that i can't seem to get the site to use the css file any ideal how to do that ?

ok to make easy how do i get the site to use a css templent i downloaded ?

i made a ticket but still no answer this was like a few weeks ago.. hm i got a css templet from online i have uploading it the site Oo but how do i get the site to use the templet ? i know 1 way u got edit the index.html by adding 1 pic at a time but then u can't type or change the words or any...