Positioning

// class name : property value
$s-displays: (
  'd-none': none,
  'd-block': block,
  'd-flex': flex,
  'd-inline-block': inline-block,
  'd-inline-flex': inline-flex,
),

// class name : property value
$s-positions: (
  'p-relative': relative,
  'p-absolute': absolute,
),