$align-items:
  baseline,
  center,
  flex-end,
  flex-start,
  stretch;

$justify-content:
  center,
  flex-end,
  flex-start,
  space-around,
  space-between,
  space-evenly;

$flex-direction:
  row,
  row-reverse,
  column,
  column-reverse;

$flex-wrap:
  wrap,
  wrap-reverse,
  nowrap;

$fractions: (
  1\/2: 50%,
  1\/3: 33.333333%,
  2\/3: 66.666667%,
  1\/4: 25%,
  2\/4: 50%,
  3\/4: 75%,
  1\/5: 20%,
  2\/5: 40%,
  3\/5: 60%,
  4\/5: 80%,
  1\/6: 16.666667%,
  2\/6: 33.333333%,
  3\/6: 50%,
  4\/6: 66.666667%,
  5\/6: 83.333333%,
  1\/12: 8.333333%,
  2\/12: 16.666667%,
  3\/12: 25%,
  4\/12: 33.333333%,
  5\/12: 41.666667%,
  6\/12: 50%,
  7\/12: 58.333333%,
  8\/12: 66.666667%,
  9\/12: 75%,
  10\/12: 83.333333%,
  11\/12: 91.666667%,
);

$sizes-numeric:
  0,
  1,
  2,
  3,
  4,
  5,
  6,
  7,
  8,
  9,
  10,
  11,
  12;

$sizes-strings:
  xs,
  sm,
  md,
  lg,
  xl,
  none;

$border-style: solid, double, none, dashed, dotted;
$directions: top, right, bottom, left;
$display: block, grid, flex, inline-block, inline-grid, inline-flex, list-item;
$text-align: left, right, center, justify, end;
$font-weight: bold, normal, 100, 200, 300, 400, 500, 600, 700, 800, 900;
$font-style: normal, italic, oblique;
$font-size: 12px;