$fonts: (
  'serif'       ('Mate'),
  'sans-serif'  ('Raleway', 'Fustat', 'Urbanist-Regular'),
  'monospace'   ('JetbrainsMono')
);

$font-size-unit: px; // px/em (default: px - em is overrated nowadays)
$letter-spacing-unit: em; // px/em (default: em - more fine tuning with em here possible)

$font-sizes-px: 7,9,8,10,11,12,14,16,18,20,22,24,26;
$font-sizes-em: 0.5,0.6,0.7,0.8,0.9,1,1.5,2,2.5;

$letter-spacings-px: -1,1,2,3,4,5;

// interpolates to a sub decimal like 0.01,0.02
$letter-spacings-em: -1,2,-3,1,2,3,4,5;

$line-heights:1.1,1.2,1.3,1.4,1.5,1.6;

$selectors: short; // long/short class names

$enable-child-selectors: yes; // yes/no (default:no)
$override: no; // yes/no > !important

/* --- Text decoration on links
  @TODO: Choose if links should get underlines and if how.
 */
$link-text-decoration: no;

/* --- Effects on links
  @TODO: Stretch-Underline, Stretch-Overline, Glue, Recolor, NULL (no)
 */
$link-text-effect: no;
