Our Guidelines were developed primarily for web use, which can result in some issues with how certain elements appear on mobile devices. Specifically, designing a Cover Page for desktop may not translate well to mobile, as text can appear overly large and there is no responsive font sizing.
We are working to improve this as we are updating the building blocks of the Guidelines gradually.
In the meantime, a useful tip is to use viewport width (vw) instead of pixels for custom headings in your design settings. The unit "vw" represents 1% of the browser window's width, which can help with dynamic resizing and improve the mobile view.
You can adjust this setting for different text types by navigating to
Settings -> Design.