// TODO: has to be discovered via js, later. $diagonals_default_size: 100%; $diagonals_multiplier: 2; $border_color: #dddddd; .styleus_sample.box { @include border-radius(4px); @include component; display: block; border: 1px solid $border_color; height: 100px; margin: 3px; width: 100px; background: #eeeeee; & > .diagonal { display: block; height: 1px; position: relative; left: 0; top: $diagonals_default_size / $diagonals_multiplier; background: $border_color; } }