HTML - <style>

A simple stylesheet

<style type="text/css">
body {
  color:red;
}
</style> 

A scoped stylesheet

In this example, the scoped attribute is used to create a style which applies only to a <section> element in which it's contained.

<article>
  <div>The scoped attribute allows for you to include style elements mid-document.
   Inside rules only apply to the parent element.</div>
  <p>This text should be black. If it is red your browser does not support the scoped attribute.</p>
  <section>
    <style scoped>
      p { color: red; }
    </style>
    <p>This should be red.</p>
  </section>
</article>

Live sample