Generated by SassMeister.com.

SassMeister-input.scss

// ----
// libsass (v2.0.0)
// ----

$em-base: 16px;

@function em($pxval, $base: $em-base) {
  @if unitless($pxval) {
    $pxval: $pxval * 1px
  }

  @if unitless($base) {
    $base: $base * 1px;
  }

  @return ($pxval / $base) * 1em;
}

$grid-columns: 12 !default;
$gutter: em(20);

@mixin columns($columns, $container-columns: $grid-columns) {
  display: block;  
  float: left;
  
  margin-right: $gutter;
  
  &:last-child {
    margin-right: 0;
  }
}

.story {
  @include columns(8);
}

SassMeister-output.css

.story {
  display: block;
  float: left;
  margin-right: 1.25em; }
  .story:last-child {
    margin-right: 0; }