Help restoring font and link colors

I use the Elle theme in the Genesis framework for my WP site. It’s always bothered me that the hyperlinks were in orange and not underlined. A few weeks ago I attempted to go in and change the color of the fonts in html. Being an html novice this was a bad idea on my part. Although I took precautions to follow my tracks, I managed to:

1) not get the links to be blue with underline,
2) mess up the standard teal blue color of my titles (such as blog titles and widget titles)

Website: http://www.lisalouisecooke.com
Genesis: updated 8/18/15 to 2.1.3
Wordpress: updated 8/18/15 to 4.3
Elle: I don’t see a version of notice for updates. I’m wondering if there is a way to reinstall or update Elle to restore the original colors.

I would be very grateful is someone could help instruct me on how to:
1) restore my original colors
2) underline my hyperlinks (I would be happy with the original orange color of the Elle theme if I can just get them underlined.)

Thank you!
Lisa