Identifying Css headers for minor front page tweaks

First off, I'll be honest: I've never found many wordpress theme sites with support and quality that merited spending the money. The quality and support you offer for Photografie has made you my go-to if I ever work with wordpress again. I'm immensely impressed. Otherwise, trying to do some minor tweaks to njgakad.com and my CSS skills has found me wanting. Three things: A) I'd like to adjust the font color for the tagline text in the header to brighten it up some. B) I was able to remove dates from featured content; how difficult is to add text to replace it? C) On the subject of hero content text, how on earth do I center and adjust the weight of the text behind the background? I've tried margin-left and right, absolutes, and clearly I'm doing something wrong. Thank you again!