Featured collection not formatting for phone display

Hello,

I am trying to feature a collection of 3 products on my website, www.sandngrit.co.uk

Using the tool “featured collection” I’ve set the amount of products shown in row to 3

This works fine from computer browser, but when viewed on a phone screen, the images do not resize and so the row drops down, meaning 2 product are displayed in one line, and the third displayed on the left. Looks very untidy!

Why is this happening? Is there a way to fix?

George

SNG