I am new to using Gantry and am a bit confused by it. For instance, I want to change the line height on my site and I see it is being controlled by a line in Gantry CSS. Should I modify Gantry CSS directly? It seems that the backend template manager actually makes modifications to the CSS, so I dont want to screw anything up by manually tweaking something. Also, I only want to change the line height in the showcase and feature areas, so it would seem I need to add some CSS. So, should I add it to Gantry CSS, template CSS, or create a separate CSS file? Sorry for the newb questions that are probably already answered somewhere, I'm just trying to cut down the time spent searching. Thanks