_s/sass/mixins/_mixins-master.scss

@mixin font-1($weight) {
  // see functions.php->google_fonts()
  // and functions.php->_s_scripts()
  font-family: "Montserrat", sans-serif;
  @if $weight == regular {
    font-weight: 400;
  } @else if $weight == bold {
    font-weight: 600;
  } @else if $weight == extra-bold {
    font-weight: 700;
  } @else {
    @error "font-weight #{$weight} not in valid font-weights for font-1: 'Montserrat'.";
  }
}

@mixin font-body($weight: regular) {
  @include font-1($weight);
}

@mixin font-title($weight: regular) {
  @include font-1($weight);
}

@mixin font-link($weight: regular) {
  @include font-1($weight);
}

@mixin font-code($weight: regular) {
  font-family: $font-code;
  font-weight: $weight;
}

@mixin font-pre($weight: regular) {
  font-family: $font-pre;
  font-weight: $weight;
}

// Center block
@mixin center-block {
  display: block;
  margin-left: auto;
  margin-right: auto;
}

// Column width with margin
@mixin column-width($numberColumns: 3) {
  width: map-get($columns, $numberColumns) -
    (($columns__margin * ($numberColumns - 1)) / $numberColumns);
}