As I am getting fitter, I am able to ride with a further drop in the handlebars (about 3 cm) than I used to. As I did this adjustment, I have also (just by b*tt feel) moved my saddle back about 1 cm and adjusted the height lower by 0.5cm.
This feels pretty comfortable to me, but I have no idea if I am doing something wrong.

What is the accepted relationship of handlebar drop to saddle back position and height?

Thanks