<h1>h1</h1>
<h2>h2</h2>
<h3>h3</h3>
<p>This is an example of some <strong>strong text</strong> and some  <em>emphasized text</em></p>

  
<div class="initial">
  <h1>h1</h1>
<h2>h2</h2>
<h3>h3</h3>
<p>This is an example of some <strong>strong text</strong> and some  <em>emphasized text</em> set to all: initial.</p>
</div>
h1, h2, h3, p, em, strong {
  color: red;
  background-color: yellow;
}

.initial * {
  all: initial;
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.