How can I style the active position of the 'panel heading' like this: https://i.sstatic.net/75s2A.jpg
I am looking to include a background color and font-weight for the active panel, as well as have the icon positioned downwards... Here is my current code:
http://www.bootply.com/wZrFTAIRfe
P.S. Please excuse any errors in my English.