As suggested in the LEARN.md file under 'Recommended Enhancements', this task is to make the main navbar sticky. The navbar should remain at the top of the screen when the user scrolls down the page.

Apple plans to overhaul the design of its TestFlight app that is available to developers for beta testing their apps, and the updated design was highlighted in a WWDC session on App Store Connect.

The navbar should remain fixed at the top (or any other specified position) of the webpage as the user scrolls. This ensures that the navigation menu is always accessible, regardless of the user's ...