Flexbox
flex-direction:
flex-wrap: Default is nowrap. If you're wrapping, css-grid may be better.
flex-flow is a shorthand for flex-direction and flex-wrap
#c flex: Default is "0 1 auto" = "initial". "auto" is "1 1 auto", which will fill space
flex-grow: 0=leaves space 1+= fills space, with fractional size
flex-shrink: >1 shrinks more
flex-basis: The initial size of the item. Default "auto"
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