I might curse CSS on many days but today … I discovered I can do this. I had no idea this was possible. The top red bar is a separate div from the rounded-bottom tab. The black line flows and there's a shadow effect. And the curvature! How'd that happen?! I remember border-radius making much more mundane curves than this!
Besides the green beauty that is the Borland (Enterprise Technology Center) grounds, I love that my freeway exit is now "Santa's Village". I love the trees we can see out all of the windows. However, my cube is still just a cube, and I face the computer with my back to the corridor, so I don't get to see the trees.