Responsive header with sliding font-size scale

_typography.scss

@mixin responsive-header($size-min, $size-max, $lineheight:false, $marginbottom:false, $breakMinTypoWidth:$break-min-typo-width, $breakMaxTypoWidth:$break-max-typo-width, $font-weight:bold ) {
  $breakmin: strip-unit($breakMinTypoWidth);
  $breakmax: strip-unit($breakMaxTypoWidth);

  @include font-size($size-min);
  @include break-sliding-typo-size($size-min, $size-max, $breakmin, $breakmax);

  @media only screen and (min-width: #{$breakmax}px  - 1px) {
    font-size: #{$size-max}px;
  }

  @if $lineheight {
    line-height: $lineheight;
  }

  margin: 0;

  @if $marginbottom {
    margin-bottom: $marginbottom;
  }

  @if $font-weight {
    font-weight: $font-weight;
  }
}