Header. Font Size and Line Height

I created the following header:
http://www.27lamps.com/Beta/Typography/Typography.html
>
Where Font Size is the same as Line Height: 2.0em.

Shouldn't the border be next to the text?

shapper wrote:>>
No, both are declared using the same expression, but it has different
meanings.
>
For font-size, the em unit means the size of the font of the parent element.
>>
Even if you set line-height to 1em, making it equal the font size, the
border does not normally touch letters. Remember that the font size is the
total height of the font, normally encompassing ascenders, descenders, and
diacritic marks. A letter like "H" should be expected to have a height that
is notably less than the font size.
>
Actually if the text contains letters like "j" and "Å", those letters might
extend to the border (set for an element with line-height: 1em) and even a
little beyond. But most letters - for the Latin script at least - have
spacing below and above them.
>
Yucca

So should I use margin on a header to specify a top and bottom
spacing?

So should I use margin on a header to specify a top and bottom
spacing?

In article
><0639b2bc-5410-4696-a2d0-fdf1e82cb859@m45g2000hsb.googlegroups.com>,
shapper <mdmoura@gmail.comwrote:
>>
Use top and bottom padding.

On 2008-08-19, dorayme <doraymeRidT...@optusnet.com.auwrote:
>>>>
I suppose on the assumption that he wants the spacing between the text
and the border.
>
But usually margins are a good choice because they collapse-- for
example bottom margin of H1 collapsing with top margin of the P that
follows it.