Great minimalistic solution Timothy! Gives developers room to work modular and hook this one in just for layout. Brilliant!

I've noticed .row isn't wrapping. Perhaps a nice addition, either fixed or with an added class.

.row {
    display: flex;
    flex-wrap: wrap;
}

or

.row {
	display: flex;
        &--wrap{
	        flex-wrap: wrap;
        }
}

if.. make sure to reset it again on breakpoint.