Today, we're super excited to publish our Drupal 8 Theming guide, a collection of tutorials that will teach you everything you need to know to create amazing Drupal 8 themes. We've put hundreds of hours into researching, digesting and understanding the Drupal 8 theme system. We've poured over the existing documentation and helped to update it whenever we could. We've read the code that makes it all possible, we've dissected core and contributed themes, and talked with front-end developers at Lullabot about their experiences, in order to learn about best practices and unique challenges. And then we boiled it all down into the ultimate Drupal 8 theming guide.