4.style-multiple-elements-with-a-css-class.html

<style>
  .red-text {
    color: red;
  }
</style>

<h2 class="red-text">CatPhotoApp</h2>
<main>
  <p class="red-text">Click here to view more <a href="#">cat photos</a>.</p>

  <a href="#"
    ><img
      src="https://bit.ly/fcc-relaxing-cat"
      alt="A cute orange cat lying on its back."
  /></a>

  <div>
    <p>Things cats love:</p>
    <ul>
      <li>cat nip</li>
      <li>laser pointers</li>
      <li>lasagna</li>
    </ul>
    <p>Top 3 things cats hate:</p>
    <ol>
      <li>flea treatment</li>
      <li>thunder</li>
      <li>other cats</li>
    </ol>
  </div>

  <form action="https://freecatphotoapp.com/submit-cat-photo">
    <label><input type="radio" name="indoor-outdoor" checked /> Indoor</label>
    <label><input type="radio" name="indoor-outdoor" /> Outdoor</label><br />
    <label><input type="checkbox" name="personality" checked /> Loving</label>
    <label><input type="checkbox" name="personality" /> Lazy</label>
    <label><input type="checkbox" name="personality" /> Energetic</label><br />
    <input type="text" placeholder="cat photo URL" required />
    <button type="submit">Submit</button>
  </form>
</main>