Benefits:
First, define your grids using the SASS mixin. You specify the selector (class or ID) and the column definitions for different breakpoints (xxs, xs, xm, md, lg)
@include grids((
('.responsive-four-col-grid', (md:(3, 3, 3, 3), sm:(6, 6, 6, 6))),
('.responsive-nested-grid', (md:(4, 4, 4))),
('.two-col-grid', (sm:(6, 6))),
));
Then simply use your grids in your HTML:
<div class="responsive-four-col-grid"> <div>Col One</div> <div>Col Two</div> <div>Col Three</div> <div>Col Four</div> </div>
Medium screen: 1 row, 4 equal columns
Small screen: 2 rows, 2 equal columns per row
Nest as deep as you like