Josh W. Comeau 🎃 på Twitter: "When `flex-basis` is set to `0`, it distributes ALL space, not just empty space. So: we put columns on either side of the nav, make them
CSS width vs flex-basis
CSS】flex-basis使い方、アイテムの幅を指定する! | SHU BLOG
Day 25: flex-basis | SamanthaMing.com
Flex Basis Property in Flexbox
A Comprehensive Guide to Flexbox. Learn Flexbox with some humor | by Miroslav Pillár | Better Programming