fix(guide): Fix solution for style multiple elements and remove stub text (#35530)

guide/english/certifications/responsive-web-design/basic-css/style-multiple-elements-with-a-css-class/index.md

@@ -3,17 +3,52 @@ title: Style Multiple Elements with a CSS Class
 ---
 ## Style Multiple Elements with a CSS Class
 
-<!-- The article goes here, in GitHub-flavored Markdown. Feel free to add YouTube videos, images, and CodePen/JSBin embeds  -->
 We need to applying our ```red-text``` class to the first ```p``` element.
 
 ### Solution
 
 In the opening tag of element ```p``` we need to add ```red-text``` class:
 
-```css
+```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="/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>
 ```
 
-### Useful links
+### More information
 
-- [Class selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Class_selectors)
+- [Class selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Class_selectors)