Can a CSS class inherit one or more other classes?

Question

I feel dumb for having been a web programmer for so long and not knowing the answer to this question, I actually hope it\'s possible and I just didn\'t know about rather tha

Answer 1

In Css file:

p.Title 
{
  font-family: Arial;
  font-size: 16px;
}

p.SubTitle p.Title
{
   font-size: 12px;
}