How to delete the white spacing before the header of a website? PLEASE HELP!

Question

What am I doing wrong?
I have tried everything. I went to the CSS course, I tried to set the margin to 0 in the html tag, body tag, I tryed padding... Nothing works.
PLEASE HELP!!

https://code.sololearn.com/WF0oBhmrLFUn/?ref=app

Answer 1

Try this:

* { margin:0; padding:0; box-sizing:border-box; }

Answer 2

Many tags have a default style like h1.
You can overwrite it.
h1 {
margin:0;
}

Answer 3

Thank you both it worked.