Generated by SassMeister.com.

SassMeister-input.scss

// ----
// libsass (v3.2.5)
// ----

/*! ========================================================================

    PRECISE CONTROL OVER RESPONSIVE TYPOGRAPHY FOR SASS
    ---------------------------------------------------
    Indrek Paas @indrekpaas

    Inspired by Mike Riethmuller's Precise control over responsive typography
    http://madebymike.com.au/writing/precise-control-responsive-typography/

    `strip-unit()` function by Hugo Giraudel
    
    02.10.2015 Add support for multiple properties

    ========================================================================  */


@mixin fluid-type($properties, $min-vw, $max-vw, $min-value, $max-value) {
  & {
    @each $property in $properties {
      #{$property}: $min-value;
    }

    @media screen and (min-width: $min-vw) {
      @each $property in $properties {
        #{$property}: calc(#{$min-value} + #{strip-unit($max-value - $min-value)} * ((100vw - #{$min-vw}) / #{strip-unit($max-vw - $min-vw)}));
      }
    }

    @media screen and (min-width: $max-vw) {
      @each $property in $properties {
        #{$property}: $max-value;
      }
    }
  }
}


@function strip-unit($value) {
  @return $value / ($value * 0 + 1);
}




/* Single property */
html {
  @include fluid-type(font-size, 320px, 1366px, 14px, 18px);
}

/* Multiple properties with same values */
h1 {
  @include fluid-type(padding-bottom padding-top, 20em, 70em, 2em, 4em);
}

SassMeister-output.css

/*! ========================================================================

    PRECISE CONTROL OVER RESPONSIVE TYPOGRAPHY FOR SASS
    ---------------------------------------------------
    Indrek Paas @indrekpaas

    Inspired by Mike Riethmuller's Precise control over responsive typography
    http://madebymike.com.au/writing/precise-control-responsive-typography/

    `strip-unit()` function by Hugo Giraudel
    
    02.10.2015 Add support for multiple properties

    ========================================================================  */
/* Single property */
html {
  font-size: 14px;
}

@media screen and (min-width: 320px) {
  html {
    font-size: calc(14px + 4 * ((100vw - 320px) / 1046));
  }
}

@media screen and (min-width: 1366px) {
  html {
    font-size: 18px;
  }
}

/* Multiple properties with same values */
h1 {
  padding-bottom: 2em;
  padding-top: 2em;
}

@media screen and (min-width: 20em) {
  h1 {
    padding-bottom: calc(2em + 2 * ((100vw - 20em) / 50));
    padding-top: calc(2em + 2 * ((100vw - 20em) / 50));
  }
}

@media screen and (min-width: 70em) {
  h1 {
    padding-bottom: 4em;
    padding-top: 4em;
  }
}