What you have it functionally correct. But the test is looking at the stack ups of your padding & margins (thats why you’ll see expected 60 to equal +- 15)
try: <header class="header" id="navbar"> for your header.
You’ll need to remove the id="navbar" from the <nav> and make your CSS match the new .header but that will get you close. Then you just gotta figure out where those extra 30px at the top are coming from