Any CSS geniuses out there?

I used to think I was a "go to" guy where computers are concerned. For most of the last 20 years (yikes, has it been that long), I've been able to figure out most of what I've wanted to do with DOS, Windows, html, and even a little database programming. You hang in there long enough (and look at enough examples of what other people have done) and you usually get it-- or get it good enough to accomplish what you set out to.

I guess I need to "hang in there" longer with CSS because I'm not getting it. Anyone out there willing to answer my inane, obtuse questions?