Please report any other irregularities here.
The search-field input element expands when you give it focus to type into it. It's a neat effect, and very similar to the search box on mdn. When you give this search box focus it expands to partially obscure the other text elements, which doesn't look great. It should probably follow what MDN does and remove the navigation links and expand the box to fill the area they occupied.
Thanks for this suggestion as well. We'll keep this open and revisit soon after our public launch. Right now we're addressing highest priority bugs only.
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