Do I type correctly, and if not, how should I?

Question

css

I have this hat. Grid at 980px. I don't know if I made the menu right. This is my first time typing and I need some advice.
I'm worried about a login that goes beyond the grid and I made the search and login separate blocks - is this right or wrong?
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Code: https://jsfiddle.net/4ao3u9td/1/
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Answer 1

I guess it's more like this:
https://jsfiddle.net/e36z7L0r/