flex-grow: if there'sspace left, this determines how much extra space will be given to each.
flex-basis: the size the items want to be. But if there isnt' enough space, this can be cut up.
Note that the minimal space required by children of the flex children cannot be necessarily cut up, and might lead things to overflow out of the container.
flex-shrink: if there'sspace missing, this determines how much extra space will be removed from each flex-basis
