Formatting archive titles

I’m trying to figure out a formatting issue that is evading me.  When you click on a category, tag, author, or date archive title, viewers are directed to a listing of matching posts.  At the top of the list, the Catch Everest Theme displays the relevant title in the following format: ------------------------------------------------------------------ Category: Title ------------------------------------------------------------------ The title appears in small, grey text.  Here is an example on my website: http://http://terraignatocartography.com/author/landunknown/ I would like to do away with the lines, and then change the font to match Heading 1 and have it aligned to the left.  How do I go about doing this?