Issue #62
CSS
Flexbox
- Properties of flex https://codepen.io/enxaneta/full/adLPwv
- Visual guide to flexbox https://scotch.io/tutorials/a-visual-guide-to-css3-flexbox-properties
- align-items vs align-content https://stackoverflow.com/questions/27539262/whats-the-difference-between-align-content-and-align-items
- align-items vs justify-content https://stackoverflow.com/questions/35049262/difference-between-justify-content-vs-align-items
- multiple line https://stackoverflow.com/questions/41789278/first-child-full-width-in-flexbox