flexbox cheatsheet
- direction
- align-items
- justify-content: content vertical
- align-content: content horizontal
direction
row
column
row reverse
column reverse
align items
flex-start
flex-end
center
stretch
justify content
flex-start
flex-end
center
space-between
space-around
space-evenly
align content
flex-start
flex-end
center
stretch
space-around
space-evenly