<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
</head>
<body>
    
  <h1>Hello Placeholder!</h1>
  <p>Lorem ipsum, dolor sit amet consectetur adipisicing elit. Beatae nesciunt eius ipsam excepturi provident suscipit optio architecto est obcaecati! Laboriosam tenetur aspernatur quaerat animi minima beatae deserunt. Iste, aliquam obcaecati!</p>
  <h2>See ya</h2>
</body>
</html>
%heading {
  color: red;
  background-color: gold;
}

%toolbelt {
  box-sizing: border-box;
  border-top: 1px rgba(#000, .12) solid;
  padding: 16px 0;
  width: 100%;

  &:hover { border: 2px rgba(#000, .5) solid; }
}

h1 {
  @extend %heading;
}

h2 {
  @extend %heading;
  text-align: center;
}

p {
  @extend %toolbelt;
}
View Compiled

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.