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 than what I think is the answer (which is that it's not possible).

My question is whether it is possible to make a CSS class that "inherits" from another CSS class (or more than one).

For example, say we had:

.something { display:inline }
.else      { background:red }

What I'd like to do is something like this:

.composite 
{
   .something;
   .else
}

where the ".composite" class would both display inline and have a red background