The Pre-check tab is tidier.
- Its own bar reading "Before you start", "Questions" and "Result" is gone. The
chapter's tabs already say where you are, and each question shows "Question n of m".
- "Back to roadmap" now sits directly under the chapter's tabs.
- The buttons sit inside the card, under the text or answers they act on, instead of
in a bar at the bottom of the page.