My square space header is stacking on smaller screens

Site URL: https://www.bnkservices.com.au

Hi,

I'm having an issue with my sqaure space header, my menu items are stacking when I go on a laptop with a smaller screen.

and my footer also isn't in a stright line on a smaller screen.

Is there any coding i need to do?

 I looked at it and you header menu on mobile is a hamburger. Your header menu is stacked on my laptop at normal res. You can go into site styles and  reduce the padding between items and see if you move them all to one line.