<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>CSS Multi-column Layout Test: vertically adjacent spanning elements with nested margins (complex)</title> <link rel="author" title="Opera Software ASA" href="http://www.opera.com/" /> <link rel="reviewer" title="GĂ©rard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" /> <!-- 2013-08-19 --> <link rel="help" href="http://www.w3.org/TR/css3-multicol/#column-span" title="6.1. 'column-span'" /> <link rel="match" href="multicol-span-all-margin-nested-001-ref.xht" /> <meta name="flags" content="ahem" /> <meta name="assert" content="In this test, the first h4 element would collapse its margin bottom with the top margin of div#child if only div#child was also a spanning element, which is not: the bottom margin of the first h4 element is 8em wide while the top margin of div#child is only 2em wide (1 column box wide). That is why the bottom margin of the first h4 element should not collapse with the top margin of div#child." /> <link rel="stylesheet" type="text/css" href="/fonts/ahem.css" /> <style type="text/css"><![CDATA[ div#multi-column { background-color: yellow; border: gray solid 1em; color: navy; font: 1.25em/1 Ahem; orphans: 1; overflow: hidden; widows: 1; width: 8em; column-count: 4; column-gap: 0em; /* N == 4; W == 2em; */ } h4, div#child { background-color: black; color: black; font: inherit; margin: 0; } h4 { margin: 1em 0; width: 11em; column-span: all; } ]]></style> </head> <body> <div id="multi-column"> na vy na vy na vy na vy <h4 id="first">black</h4> <div id="child"> <h4 id="nested">black</h4> </div> na vy na vy na vy na vy </div> </body> </html>