13.9.12 CSS support

You can modify the CSS style definitions for the exported file. The HTML exporter assigns the following special CSS classes¹ to appropriate parts of the document—your style specifications may change these, in addition to any of the standard classes like for headlines, tables, etc.

p.author	author information, including email
p.date	publishing date
p.creator	creator info, about org mode version
.title	document title
.subtitle	document subtitle
.todo	TODO keywords, all not-done states
.done	the DONE keywords, all states that count as done
.WAITING	each TODO keyword also uses a class named after itself
.timestamp	timestamp
.timestamp-kwd	keyword associated with a timestamp, like ‘SCHEDULED’
.timestamp-wrapper	span around keyword plus timestamp
.tag	tag in a headline
._HOME	each tag uses itself as a class, “@" replaced by “_"
.target	target for links
.linenr	the line number in a code example
.code-highlighted	for highlighting referenced code lines
div.outline-N	div for outline level N (headline plus text)
div.outline-text-N	extra div for text at outline level N
.section-number-N	section number in headlines, different for each level
.figure-number	label like “Figure 1:"
.table-number	label like “Table 1:"
.listing-number	label like “Listing 1:"
div.figure	how to format an in-lined image
pre.src	formatted source code
pre.example	normal example
p.verse	verse paragraph
div.footnotes	footnote section headline
p.footnote	footnote definition paragraph, containing a footnote
.footref	a footnote reference number (always a ﹤sup﹥)
.footnum	footnote number in footnote definition (always ﹤sup﹥)
.org-svg	default class for a linked ‘.svg’ image

The HTML export back-end includes a compact default style in each exported HTML file. To override the default style with another style, use these keywords in the Org file. They will replace the global defaults the HTML exporter uses.

#+HTML_HEAD: <link rel="stylesheet" type="text/css" href="style1.css" />
#+HTML_HEAD_EXTRA: <link rel="alternate stylesheet" type="text/css" href="style2.css" />

To just turn off the default style, customize org-html-head-include-default-style variable, or use this option line in the Org file.

#+OPTIONS: html-style:nil

For longer style definitions, either use several ‘HTML_HEAD’ and ‘HTML_HEAD_EXTRA’ keywords, or use <style> ... </style> blocks around them. Both of these approaches can avoid referring to an external file.

In order to add styles to a sub-tree, use the ‘HTML_CONTAINER_CLASS’ property to assign a class to the tree. In order to specify CSS styles for a particular headline, you can use the ID specified in a ‘CUSTOM_ID’ property. You can also assign a specific class to a headline with the ‘HTML_HEADLINE_CLASS’ property.

Never change the org-html-style-default constant. Instead use other simpler ways of customizing as described above.

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1. If the classes on TODO keywords and tags lead to conflicts, use the variables org-html-todo-kwd-class-prefix and org-html-tag-class-prefix to make them unique.↩