Social Links Page with HTML, CSS and techniques like flexbox

Hi! Interesting work, it's always cool to experiment with design =)

Here is a few tips:

• Use min-height instead of height on the body tag in case if the user's devise have smaller screen than content.
• Almost the same about .article - try not to explicitly set height for container elements. In real projects there could be the cases when content might changed, so it's better when height of a container depends on the content.
• It is better use ul and li tags for the buttons-links because of semantic. To keep html leaner you could put a directly into li, buttons aren't really necessary here.

Oh, and the padding property haven't auto value.

Anyway, cool job, keep doing =)

The font is little bit hard to read, it's not good for user experience