Take a look at the code provided on this link:
I attempted to address the issue by removing the Scroll Bar in CSS, assuming it was caused by overflow-x. However, the blank space above the navigation bar persists. Upon inspecting the page using the Browser's developer tools, it appears that the white space is part of the header element. Surprisingly, there are no visible margins or properties that could explain its presence. At this point, I am puzzled and unsure about what might be causing this unexpected behavior.