CSS Classes - How do I use them on objects?


I am trying to change the appearance of an entry box in my course (i.e. no borders etc).

I am attempting to use the advanced appearance options box to do this, but I am not sure what format I need to enter it in (I don't know a lot about CSS).

What is it supposed to look like? (I've attached a screen shot to show you what I have attempted).

Kind regards