Answers for "flex box columns"

flex box

display:flex
flex-direction:row| row-reverse|column|column-reverse
align-self:flex-start|flex-end|center|baaseline|strech
justify-content:start|center|space-between|space-around|space-evenly

css all flex properties

.item {
  flex: none | [ <'flex-grow'> <'flex-shrink'>? || <'flex-basis'> ]
}