<div id="intro"><h2>Introduction</h2></div>
<div class="standout"><h3>Classes and IDs in CSS</h3>
<p>Classes and IDs are super easy in CSS. You're using them right now!</p></div>
<h3>Regular HTML Selectors</h3>
<p>If you don't bother with a class or ID, an HTML element just gets
the regular CSS styling for that element—or the default styling if you
don't specify any particular styling on the stylesheet.
</p>
error:
Oops, try again. Did you remember to add the intro ID to the h2 header?
I already tried another browser