Any reason for simple selector by ID not be enough?
//My CSS rules
Yes, i really want to change the way the courses are shown, but only on this page:
And since there are elements on the frontpage that are called the same way, my CSS's rules works on both pages, but I just want them to do it on the course index and not on the frontpage.
But magically today it works perfectly, thank you very much Trevor and Jean-Roch for your help.