I think I saw a grid framework, like this a while back but I can’t remember where and its not in my bookmarks or history…. I think mebe it was somewhere on code visually try looking through their archives for the past couple of months, you’ll probably find it.
I think Gavii means a grid system where instead of just switching from normal layout to a single column for like mobile design it switches to a smaller multicolumn layout first with the number of colums depending on how narrow the window is I.e. a layout that has a row with 12 columns as you shrink it becomes two rows of 6 columns. then 3 rows of 4 etc with some ordering based around the height. I’ve seen one and now I can’t find it :(