Grid is not auto resizing on mobile

Hello all,

The grid on my site is not auto resizing to one column when the screen width is small. Here’s a screenshot of the issue. Also, here is a read only view of my site How can I make it so that when the width is too small to fit two columns it auto shrinks to one column. Thanks so much for the help!

I usually set the display to flex vertical when I need stacked content on smaller breakpoints.