Hi @Vincent,
If you set the wrap_on property of your ColumnPanel to never, this will prevent your Columns from wrapping on smaller screens:
This will preserver your layout, and resize the content inside your ColumnPanel as the browser window changes. Here’s a simple clone link - is this what you were looking for?
https://anvil.works/build#clone:VKCXASCDNT2VL3SA=QSC5UYEOMRDDUGLTI53JG2UU