Form Fields and Buttons Not Vertically Responsive

Hello -

I have created the following site - - using Screens. I am using the Foundation form fields and buttons. I notice that the fields and button do not change vertical height when the screen size gets smaller. Is this a bug?

Also, the button size does not change vertical height when I change the button ‘Size’ setting within the Foundation Button stack. Is this a bug?

It seems that a) these fields and buttons should be vertically responsive and b) the button itself should respond to the ‘Size’ setting within Foundation.

Any clarification is greatly appreciated.

Thank you!