Summary
-------

* Do not edit the CSS directly, edit the source SCSS files
* To be able to use the latest/adequate version of sass, install sassc
* The configure script will detect whether or not you have sassc installed;
  if you do, it will regenerate the CSS every time you modify the SCSS files.
* You can also use the included parse-sass.sh script to do it manually.

How to tweak the theme
----------------------

GTK themes are complex, so to keep it maintainable it's written and
processed in SASS. The generated CSS is then transformed into a gresource file
during gtk build and used at runtime in a non-legible or editable form.

It is very likely your change will happen in the _common.scss file. That's where
all the widget selectors are defined. Here's a rundown of the "supporting"
stylesheets, that are unlikely to be the right place for a drive by stylesheet
fix:

_colors.scss        - global color definitions. We keep the number of defined
                      colors to a necessary minimum, most colors are derived
                      from a handful of basics. It covers both the light variant
                      and the dark variant.

_colors-public.scss - SCSS colors exported through gtk to allow for 3rd party
                      apps color mixing.

_drawing.scss       - drawing helper mixings/functions to allow easier
                      definition of widget drawing under specific context. This
                      is why the theme isn't 15000 LOC.

_common.scss        - actual definitions of style for each widget. This is
                      where you are likely to add/remove your changes.
                      
You can read about SASS at http://sass-lang.com/documentation/. Once you make
your changes to the _common.scss file, GTK+ will rebuild the CSS files.


How to edit the assets
----------------------

The assets are created in the assets.svg file and then rendered with ./render-assets.sh by fetching the object id name from assets.txt. If you're going to edit an image in inkscape make sure the object id is the same when you're saving. If you're going to create a new asset you need to add the object id in assets.txt.
