Header Icons are minimizing when I open up the store preview

Inspecting the icons shows me that their size is dependent on the body font size and the size changes when I increase the font size.

I edited the settings_schema.json to increase the threshold of the font size, however when I up it past Shopify’s recommended 130% and make it a suitable size, this sends the mobile view completely haywire and ruins the alignment of text in my product cards etc.

I am not yet clever enough to figure this out!

I am bamboozled