Extra Padding/Spacing - HTML & CSS - SitePoint Forums

I’ve made a jumbled mess, so I stripped my html and css to just the basic structure trying to figure out what I’m doing incorrectly. Essentially the page has a “header” container at the top of the page. Below that, it is divided into two columns; on the left are navigation buttons and to the right is the content. The only fixed width is for the navigation buttons. I’m not after a “pixel-perfect” look, but I’m getting a gap below the header division as soon as I add any content into the top divi

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