How to visualize button clicks in mobile browsers?

Question

css

There is a site nashilyudi-yug.ru I did not write it, I just eliminate some jambs. The problem is that the buttons on the site, the ones that are yellow, are not visually clickable. They work, letters arrive, but the visitor does not see that the button has been pressed. The button itself is an input of type submit. It can be fixed?

Answer 1

>How to visualize button clicks in mobile browsers?
Just like on desktop browsers.
Video on the site, of course, lol .. Have they heard about stabilization? xd