My preference is to use them with @media queries to create more or fewer columns within auxiliary elements (headers, footers, asides), usually to pretty good effect.
Multi-column body text is largely an abombination.
For images, I'm still largely sticking to floats.
I've done some sidenote styling that I ... think I like. I don't remember how responsive this CodePen is or isn't though I've created some pretty responsive layouts based on it:
https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Columns...
My preference is to use them with @media queries to create more or fewer columns within auxiliary elements (headers, footers, asides), usually to pretty good effect.
Multi-column body text is largely an abombination.
For images, I'm still largely sticking to floats.
I've done some sidenote styling that I ... think I like. I don't remember how responsive this CodePen is or isn't though I've created some pretty responsive layouts based on it:
https://codepen.io/dredmorbius/full/OVmKZX
I consider equation support a lost cause.