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typekit-weights-input.scss

// ----
// Sass (v3.3.0.rc.1)
// Compass (v0.13.alpha.7)
// ----

/*
*   Typekit Font Weights
*
*    100 = thin
*    200 = extra-light
*    300 = light
*    400 = normal, book
*    500 = medium
*    600 = demi-bold
*    700 = bold
*    800 = heavy
*    900 = black
*
*/
$weights: "thin", "extra-light", "light", "normal", "medium", "demi-bold", "bold", "heavy", "black";

@each $weight in $weights {
  .weight-#{$weight} {
      font-weight: unquote(index($weights, $weight) + '00');
  }
}

typekit-weights-output.css

/*
*   Typekit Font Weights
*
*    100 = thin
*    200 = extra-light
*    300 = light
*    400 = normal, book
*    500 = medium
*    600 = demi-bold
*    700 = bold
*    800 = heavy
*    900 = black
*
*/
.weight-thin {
  font-weight: 100;
}

.weight-extra-light {
  font-weight: 200;
}

.weight-light {
  font-weight: 300;
}

.weight-normal {
  font-weight: 400;
}

.weight-medium {
  font-weight: 500;
}

.weight-demi-bold {
  font-weight: 600;
}

.weight-bold {
  font-weight: 700;
}

.weight-heavy {
  font-weight: 800;
}

.weight-black {
  font-weight: 900;
}