Button Style
btn default
btn .rounded
btn .circled
btn .outline
btn .outline .rounded
btn .outline .circled
btn .outline .circled .btn-inverse
btn .outline .circled .btn-inverse
btn .outline .circled .btn-inverse
bt default
bt .ro
bt .circled
btn .ou
btn .outline .rounded
bt .ou .circled
bt .outline .circled .bt-inverse
bt .ou .circled .bt-inverse
btn .ou .circled .bt-inverse