Wordpress how to disable empty search?

Question

WordPress

Hello.
Wordpress + Woodmart + 600+thousand product database
If user clicks on empty search, host will crash with out of memory error. Well and so, there is a task to forbid to click on search at an empty request. The search itself is ajax.

Answer 1

Make the field required. And that's it. The browser will not submit the form.

Answer 2

the button will go down, because the indents are preserved,
the problem is most likely in the background-size,
change it to cover - then the button will lie on a beautiful background

Answer 3

can the font be smaller? And in general, remove the extra indents