How to Change the Effect for All Containers

[CreatorTim]

Hey, I’d like to modify the effect on all my containers.

Currently, when you look at my container, you’ll see some placeholder text. When I click on the container, the text shrinks and moves to the top-left corner.

What I’d like instead is for the text to stay as it is (normal size) when you click on the container. Once I start typing, the placeholder text should disappear, leaving only the typed content visible.

I want it to work exactly like it does here: https://tomnoske.store/account/login?return_url=%2Faccount

And here’s the link to my store: https://1049xn-ya.myshopify.com/account/login

Thanks a lot,
Tim