Responsive Infusionsoft Storefront

Has anyone had any success with making their storefront responsive - so that it works on mobile devices?

I know there are a couple paid services out there that offer to make this happen. From what I understand, this requires some changes to the shopping cart theme CSS, and possibly some additions to the HTML areas, that, with some development, could achieve this.

I’d be curious to see if any of our other community members have any insight into what CSS changes/additions might be needed.

I’ve tried this:

It does make it mobile responsive, but it overrides all of the layout and therefore doesn’t look great.