OpenMOOC uses a farm of Askbots. Each Askbot instance share code and style. Askbot is a django application, you can search at the settings.py file where are allocated style info:
STATIC_URL STATIC_ROOT ASKBOT_EXTRA_SKINS_DIR
STATIC_URL is served by Apache/Nginx server, so take a look what are the target path related to this urls, may match the STATIC_ROOT value.
ASKBOT_EXTRA_SKINS_DIR defines extra template folders. By default we use it to store openmooc images/css, the askbot-openmooc-themes folder that is located at the PROJECT_ROOT (askbot-openmooc/askbotopenmooc).
In that folder there are:
- mooc/media/style
- extra.css Extra css rules for askbot
- custom.css Customize rules
- mooc/media/images
- logo.png The logo of the OpenMOOC entity.
After change/update any static file you will need to execute python manage.py collectstatic (it will copy static files from askbot folder to STATIC_ROOT path)