Parum claram Anteposuerit
Litteranum formas humaintas per Secula quarta
When working with flexbox you need to think in terms of two axes — the main axis and the cross axis. The main axis is defined by the flex-direction property, and the cross axis runs perpendicular to it.
Everything we do with flexbox refers back to these axes, so it is worth understanding how they work from the outset.