Slide down from cards

[jrock2004]

So I am building a staff select tool that when you click on a card you can see a list of staff. On desktop it fades in on the right of the cards. On mobile, I want the list of staff to be connected to the card.

I was hoping that I could set css top but that needs to be dynamic based on which card you click on. Is there a way during transition to set the new top? Or would I need to have staff list component duplicated for each card just for mobile?