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<title>CSS Line Height Inheritance</title> 
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<h1>Use only &lt;number&gt; for line-height</h1> 
<h2>unless you like solving inexplicable inheritance problems or setting an explicit line-height on every element</h2> 
<h3>div {line-height: 1}; div div {font-size: 200%}</h3> 
<div style="line-height: 1;">The quick brown fox<br>jumps over the crazy
<div style="font-size: 200%;">The quick brown fox<br>jumps over the crazy</div></div> 
<h3>div {line-height: 1em}; div div {font-size: 200%}</h3> 
<div style="line-height: 1em;">The quick brown fox<br>jumps over the crazy
<div style="font-size: 200%;">The quick brown fox<br>jumps over the crazy</div></div> 
<h3>div {line-height: 100%}; div div {font-size: 200%}</h3> 
<div style="line-height: 100%;">The quick brown fox<br>jumps over the crazy
<div style="font-size: 200%;">The quick brown fox<br>jumps over the crazy</div></div> 
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<p>When rendered according to the
<a href="http://www.w3.org/TR/CSS21/visudet.html#propdef-line-height">css 2.1 spec</a>,
the 200% text in the second two div divs, those for which line-height of the parent
are specified in em or %, will overlap, the child divs being 1/2 the height of their containing
divs; while the first div div will be 2/3 the height of its containing div,
and its text won't overlap. The overlapping text in the latter div divs is because the spec requires the calculated
line-height specified in em or % be inherited by the children. In contrast, it is &lt;number&gt; itself that is inherited by
the children, which allows the line-height specified to be applied in reference to the font-size of the child div instead of
the ancestor.</p> 
<hr> 
<a href="http://fm.no-ip.com/Auth/IE/line-heightIE.html">IE has an additional problem with line-height.</a> 
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Last Modified<br>2005.11.29<br>&#169; Felix Miata<br> 
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