best way to change flex direction based on media width?

[hoclun-rigsep]

Hello!

I'm sure I could make this work one way or another but I would prefer canonical advice on making an h-box go vertical when viewport width passes a given point!

[h-box ; wish it would go vertical when width is <900px
     :gap "10px"
     :size "auto"
     :style {:background-color :aliceblue}
     :children
     [[staff-container :firstDay]
      [staff-container :secondDay]
      [staff-container :Night]]]

Thanks for all you do.