I still design sites mostly the same way I did before smart phones were a thing. That said, even back in the day it was good practice to have your layout respond well when the user resized their browser. As I understand it, that seems to be the core idea of mobile-first, ie usefully displaying your content regardless of how small or big the available screen space.
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I still design sites mostly the same way I did before smart phones were a thing. That said, even back in the day it was good practice to have your layout respond well when the user resized their browser. As I understand it, that seems to be the core idea of mobile-first, ie usefully displaying your content regardless of how small or big the available screen space.