Display-flex problem

Questions
1

Hi!
Can I use something like flex-direction: column; I need elements inside ‘page’ as block elements.

<div class="page display-flex align-items-center justify-content-center">
<div class="align-self-flex-start">
            Top panel
</div>
<div>
            Center panel
</div>
<div class="align-self-flex-end">
            Bottom panel
</div>
</div>
2

Just add it via style for now:

<div style="flex-direction: column"

Will add such helper classes in next update