Generated by SassMeister.com.

SassMeister-input-HTML.html

<div class="promo">
  Lorem ipsum dolor sit amet
</div>

SassMeister-input.scss

// ----
// Sass (v3.4.14)
// Compass (v1.0.3)
// ----

.box {
  display: block;
  padding: 10px;
}

.promo {
  @extend .box;
  background: red;
  color: white;
}

.aside {
  @extend .box;
  font-style: italic;
}



























.footer .box {
  font-size: 75%;
}

SassMeister-output.css

.box, .promo, .aside {
  display: block;
  padding: 10px;
}

.promo {
  background: red;
  color: white;
}

.aside {
  font-style: italic;
}

.footer .box, .footer .promo, .footer .aside {
  font-size: 75%;
}

SassMeister-rendered.html

<div class="promo">
  Lorem ipsum dolor sit amet
</div>