Set max width for display

Hi,
I’m trying to display my downloads list in a column – whichever template I try download manager is overflowing the width of the column (which is around 300px). There are mobile views that would fit perfectly, but download manager doesn’t trigger them as the viewport is large, even though the container it’s being displayed in is small.

Can I force mobile layout?
Or is there some CSS you could show me to constrain the max width of the displayed templates? https://wordpress-360695-1121556.cloudwaysapps.com/adult/

Many thanks,
Ben.

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