[euph0ria]

Ideas for usability: -Add a background behind the buttons when you have picked. -When having picked, display above the buttons a helper text like "Now scroll to change position".

[hinkley]

CSS outline would be a good visual indicator here as it won’t modify the page layout.

[woodpanel]

Came here to write the same. Give it some visual state of “pickedness“ (e.g. by displaying this state as elevated).

But in any case, great stuff!