Simple (and Responsive)

Nested

@include column(1 of 3);

@extend %row; @include column(3 of 4);

@include nested-column(1 of 2, 3 of 4);
@include nested-column(1 of 2, 3 of 4);

Automatic Rows

@include column(1 of 3);
@include row-each(3);

@include column(1 of 3);
@include row-each(3);

@include column(1 of 3);
@include row-each(3);

@include column(1 of 3);
@include row-each(3);

@include column(1 of 3);
@include row-each(3);

@include column(1 of 3);
@include row-each(3);

@include column(1 of 3);
@include row-each(3);

@include column(1 of 3);
@include row-each(3);

@include column(1 of 3);
@include row-each(3);