Update 2: it’s actually down to the code Grist provides to embed the form, which specifies a width. I need to look in to how this can be made responsive.
Update: the problem arises when the form is embedded in my website. If I send a link in an email, the form works fine. So it’s to do with the design of the site, it seems.
I have built and tested a Grist form to collect information. On the desktop it works fine, but I was frankly a bit shocked to find that it is useless on a phone - it retains something like its desktop width. Is there a way to make it responsive?