<h1>Main Heading of the Article</h1>
<h2>A Subheading of the Article</h2>
* {
  box-sizing: border-box;
}

body {
  font-family: 'Lato';
  text-align: center;
  margin: 0;
}

h1 {
  font-size: calc(2em + 2vw);
}

h2 {
  font-size: calc(1.5em + 0.75vw);
}

External CSS

  1. https://fonts.googleapis.com/css?family=Lato

External JavaScript

This Pen doesn't use any external JavaScript resources.