Pop is a clean, flexible HTML5 base theme built with standard practices from HTML5 Boilerplate, 320 and Up and Less Framework. Pop provides a responsible responsive design with a single adaptive grid to support multiple designs and typography layouts.
Integrated with Less grid overlay script.
Build Your Own Sub-Theme
The base Pop theme is designed to be easily extended by its sub-themes. Avoid modify any of the CSS or PHP files in the pop/ folder; Instead you should create a sub-theme of Pop in a folder outside of the root pop/ folder.
Follow the instructions in pop_starterkit/README_pop_starterkit.txt to start building your own subtheme.
Excellent documentation on Drupal theming can be found in the Theme Guide (http://drupal.org/theme-guide)
HTML5 Boilerplate (http://html5boilerplate.com/)
Less Framework (http://lessframework.com/)
320 and Up (http://stuffandnonsense.co.uk/projects/320andup/)