@namespace html url(http://www.w3.org/1999/xhtml); :root { font:small Verdana; font-weight: bold; padding: 2em; padding-left:4em; } * { display: block; padding-left: 2em; } html|style { display: none; } html|span, html|a { display: inline; padding: 0; font-weight: normal; text-decoration: none; } html|span.block { display: block; } *[html|hidden], span.block[html|hidden] { display: none; } .expand { display: block; } .expand:before { content: '+'; color: red; position: absolute; left: -1em; } .collapse { display: block; } .collapse:before { content: '-'; color: red; position: absolute; left:-1em; }