Formatting LearnPress

My site currently uses Divi and we’re really happy with it thus far but we are adding a LearnPress course for our members and the formatting isn’t correct.

On the course page the enroll button isn’t visible (almost as if it’s a white box with white text) but it clickable if you know where to click. This is the same for the entire process – purchase the course button etc

In addition to this, the lessons are awful on mobile devices. I’d like to be able to change the formatting and fix the button issues but can’t seem to see an option anywhere and although I’m aware there is a LearnPress mobile app, we are not keen on getting members do download even more software etc.

The page I need help with: [log in to see the link]