Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.3.4)
// Compass (v1.0.0.alpha.18)
// Stipe (v)
// ----

@import "stipe/manifest";

%uppercase {
  text-decoration: uppercase;
}

h1 {
  @include heading;
  @extend %uppercase;
}

h2 {
  @include heading(24);
  @extend %uppercase;
}

h3 {
  @include heading(18);
  @extend %uppercase;
}

.module {
  background-color: red;
  h1 {
    color: white;
  }
}

SassMeister-output.css

h1, h2, h3 {
  text-decoration: uppercase;
}

h1 {
  font-size: 3.83333em;
  line-height: 1.17391;
  margin-bottom: 0.3913em;
  color: #333333;
  font-weight: normal;
  font-family: "Helvetica Neue", Arial, sans-serif;
}

h2 {
  font-size: 2em;
  line-height: 1.5;
  margin-bottom: 0.75em;
  color: #333333;
  font-weight: normal;
  font-family: "Helvetica Neue", Arial, sans-serif;
}

h3 {
  font-size: 1.5em;
  line-height: 1;
  margin-bottom: 1em;
  color: #333333;
  font-weight: normal;
  font-family: "Helvetica Neue", Arial, sans-serif;
}

.module {
  background-color: red;
}
.module h1 {
  color: white;
}