mem wrote:

> Let's suppose that by looking to those wireframes, I can say that all my h2 
> will have a padding-bottom of 10px.
> However, if later on, I create a rule telling that the ul will have a margin 
> top of 5px... (because almost all may have that attribute) if I place the h2 
> on top of this ul, instead of the desired 10px, we will end up with 15px... 
> and there, I ask: where/how should I subtract those extra 5 ?
> 
> This is only an example, this is some sort of conflict that happen A LOT 
> while I'm creating the css.

Understood about this being only an example, but does
this one case, at least, not get made much simpler
by the concept of collapsing margins ?

        http://www.w3.org/TR/CSS2/box.html#collapsing-margins

Philip Taylor
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