anchor.diff:            &lt;div class="ingredient-amount"&gt;&lt;/div&gt;
           &lt;/section&gt;
   
  -  section(data-narration="/bootstrap/10")
  +  section(data-narration="/bootstrap/9")
       h2 Semantics are important.
       h3 But how can we do it?
   
  -  section(data-narration="/bootstrap/11")
  +  section(data-narration="/bootstrap/10")
       h2 Less
       blockquote "... extends the CSS language, adding features that allow variables, mixins, functions and many other techniques that allow you to make CSS that is more maintainable, themable and extendable." <br />- <a href="http://lesscss.org/">lesscss.org</a>
   
  -  section(data-narration="/bootstrap/12")
  +  section(data-narration="/bootstrap/11")
       h2 Demo: Semantic Bootstrap
       h3 bootstrap.less, Less mixins
   
  -  section(data-narration="/bootstrap/13")
  +  section()
       h2 Demo: Semantic Bootstrap
       +screencast("/bootstrap/semantic")
   
  -  section(data-narration="/bootstrap/14")
  +  section(data-narration="/bootstrap/13")
       h2 Review
       ul
         li Use Cases
  
positive.code:           &lt;div class="col-md-4"&gt;&lt;/div&gt;
          &lt;/div&gt;
  
    section(data-narration="/bootstrap/9")
      h2 Better?
      pre
        code.html.
  
negative.code:       li Components
        li JavaScript add-ons
  
    section(data-narration="/bootstrap/4", data-jsbin="/tetus/5/embed?html,output")
      h2 Example: Awesome Co.
      iframe.jsbin-embed
      p
        small <sup>*</sup> Resize, rearrange, or hide panels to view the responsive output
  
    section(data-narration="/bootstrap/5", data-jsbin="/hiyoq/6/embed?html,output")
      h2 Example: The Grid
      iframe.jsbin-embed
      p
        small <sup>*</sup> Mouse-over the HTML and click the top-right arrow. Resize the browser window to study responsiveness.
  
    section(data-narration="/bootstrap/6", data-jsbin="/tifus/7/embed?html,output")
      h2 Example: Some JavaScript
      iframe.jsbin-embed
  
    section(data-narration="/bootstrap/7")
      h2 Opaque?
      pre
        code.html.
  