.row-sta-sta { @include flex-layout(row, sta, sta) }
.row-sta-bet { @include flex-layout(row, sta, bet) }
.col-sta-sta { @include flex-layout(col, sta, sta) }
.col-str-sta { @include flex-layout(col, str, sta) }
.flex-1 { @include flex(1 0) }