https://developer.mozilla.org/en-US/docs/Web/CSS/display
https://codepen.io/mazhermon/pen/wvKxzEO
https://css-tricks.com/snippets/css/complete-guide-grid/#prop-grid-area
https://css-tricks.com/snippets/css/a-guide-to-flexbox/
TODO: Flexbox chat (inside position)