anchor.diff:  :doctype: book
   :creator: {author}
   :producer: Asciidoctor
  -:keywords: Asciidoctor, samples, ebook, EPUB3, KF8, MOBI, Asciidoctor.js
  +:keywords: Asciidoctor, samples, e-book, EPUB3, KF8, MOBI, Asciidoctor.js
   :copyright: CC-BY-SA 3.0
   :imagesdir: images
   
  
positive.code: == About the Theme
  
  EPUB3 and KF8/MOBI files are styled using CSS3.
  However, each ereading platform honors a reduced set of CSS3 styles, and the styles they allow and how they implement them are rarely documented.
  All we've got to say is _thank goodness for CSS hacks, media queries and years of CSS experience!_
  
  The theme provided with {project-name} has been crafted to display EPUB3 and KF8/MOBI files as consistently as possible across the most common EPUB3 platforms and to degrade gracefully in select EPUB2 platforms.
  
negative.code: In truth, the chapter ID can be a _derivative of_ the chapter filename.
  In that case, an attribute reference can be used to prepend a prefix to an inter-document cross reference.
  For example, if you want each chapter file to begin with `chapter-`, you'd write the xref as `+xref:{chapter-prefix}chapter-id#chapter-id[]+`.
  You'd then assign an empty value to the `chapter-prefix` attribute when converting to an e-book and `chapter-` for all other formats.
  
  The next section goes into more detail about how to set up the spine document and include the chapter files.
  
  