Yes, you do.
If you're going to do ANYTHING with web apps, Donn, you need to plan to bite the bullet and spend some time getting a basic understanding of CSS.
Because cascading style sheets "cascade", you don't need to mess with Bruce's stuff.
Rather, your own custom CSS file can override any of his CSS settings that you need to.
And you can also specify custom CSS class elements for most of the stuff you put on a screen with NetTalk. By adding your own class to something, you don't even need to override Bruce's (which might affect multiple places in your app).
There've been innumerable webinars where Bruce has shown how to use the Developer Tools in Chrome or other browsers to experiment with getting the look you want, then putting that little bit of CSS into your own file. You might look at some recordings or bring this screen to the next Thursday webinar and have him show you how to approach it.
In my as-always ever-so-humble opinion....