To me, the meaning of karma is not about good or bad. Also It is not about what happened in the past or will happen in the future. The idea of karma is to look and understand our personality, learning about our personality , how it is built up, how it is, how we can shape it. The fear of karma and all the fuss about it is quite useless.
Karma is more like an example that permits us to understand ourselves, to change and improve our lives. At the end karma is all about us, it’s about improving and facing our responsibility on this planet !