Trying to make a curve background without maybe using the border properties like radius and width as when in the dark mode you can see the border and radius very clearly.
Is there a way I can do it so it just shows the curving background, have a space at the top for the sticky nav bar so just the radius doesn't work as it hides below.
See images below, also included a test file.
Thanks for any help or ideas on this.


https://www.dropbox.com/scl/fi/f8tiv0w7 ... fm455&dl=0