justify-content:
normal
start
center
end
space-between
align-items:
stretch
start
center
end
flex-start
flex-end
align-content:
normal
start
center
end
space-between
flex-wrap: wrap
flex-wrap: wrap-reverse
flex-direction:
row
flex-direction:
row-reverse
flex-direction:
column
flex-direction:
column-reverse