Mobile First? Min vs Max width

For Google, mobile first means that the mobile version of a website is used for the ranking – also on the desktop. The search engine giant launched its Mobile First Index in spring 2018, which was first announced in November 2016. The search index is to be gradually replaced by the mobile-first index.

Max-width vs Min-width is a recurring discussion, with usually max-width winning out. Is that because WordPress is max-width? Is Cwicly max-width queries? Can I use min-width with Cwicly? I have Microthemer, which has a mid-width option.

It makes me wonder if min-width is a ranking factor, albeit small.