Remove blue focus outline

Hi!

I was wondering if it is possible to remove the blue focus outline around the buttons you click in the interactive video?

Here's a link to the video: (it has autoplay on and there are some lightning audio, so be careful not to have volume set to full)
http://www.acm.no/test/valhall/

I have tried several varieties and locations of border:0; and outline: none; without any luck.

Best regards,
Marthe