How do i hide/ remove the menu in production?

Anybody has any idea how to remove the padding top of the starting page.
There is a lot of unnecessary white space left at the top.

Inspecting the layout, there is a padding attribute of the .css-1y0tads class. If ones removes it, it somehow does what I need.

However, I am not sure where to insert inside my code, as I guess these are defaults .css attributes.

Any ideas??