Ah! After some further fumbling, I discovered that the page element is addressed simply by .page, rather than .tm-page or something similar. Also, the single-white line is part of either .tm-header or .tm-footer, and can be removed by setting the border to 0. 🙂
Hey Jason,
I have glad to hear you find a solution. This really comes down to plain CSS, inspect pages in your browser, grab the element classes you would like to target and style them in your child theme CSS file. I can't really go deeper into teaching CSS as it is a bit out of the Beans Scope but you will find zillions of great tutorials which will teach you some magic 🙂
Have fun,
PS: I moved your request to support.