Menu and CSS3 transitions

Hi there,

I’d like to add a bit of fancy on my blog’s menu, but only with CSS3 properties.

Based on the Twenty Ten’s menu, I’ve only been able to add CSS transition to its first level, through the access a {} class.
I’ve tested in on each class individually, and it’s like there’s no way to animate the sub-levels in any ways.

Does anyones knows how to do this ?

Thanks