Hi there!

You can remove the padding of the subscribe button only for smaller screens.

So here is a sample media query for you, please put this into your custom.css file:

@media only screen and (max-width: 992px){
    #btn-1609971385558{
        padding: 0;}
}

You can change the padding value if you want!

Hope this will solve the issue for you!

Best Regards

You are always welcome!