How to Get a Wider Area for Text in Journal Posts

[cavocorax]

I hope someone can help me out here as I don't know anything about CSS or modifying themes (although the CSS course here looks interesting, once I have time to check it out).

I really like the 5AM theme due to its simplicity and the red/black fonts, but I don't care for the way the text wraps in the posts, as you can see here.

Is there something I can paste into the custom CSS field in DW to change that? Or would I need to rebuild the theme from scratch to get it to do what I want?

Thank you!