Сan't pass the test in the landing page task

Hello! I just can’t pass test 13 in landing page task. I tried everything, my navbar is really on top of the viewpoint, but the test failes. Perhaps more experienced developers have ideas on how to fix this? I would be grateful for your help.
Link to my pen

Welcome, n4d…

If you read the error message, it gives a very useful hint as to the problem:

#header or one of its children should be at the top of the viewport : expected 20 to be close to 0 +/- 15

Here is the problem:

margin: 20px 10%;

Hope this helps

thanks for solution)