[idea:css-reference]reference2026-08-20

CSS variable reference

You can override any value from the theme reference as a CSS variable, as well as other aspects of a rookery’s appearance.

PropertyDefaultWhat it sets
--idea-tag-size--idea-label-sizeA tag pill’s font size. Follows the ID’s size unless you separate them.
--idea-tag-radius999pxA pill’s corner radius.
--idea-tag-color, --idea-tag-bg--idea-id-color, rgba(128, 128, 128, .18)An untagged-by-tags-color pill’s text and background. Setting tags-color writes these per tag for you.
--idea-tag-line--idea-border-colorThe tick an outline row draws off the outline’s rule, where the row’s idea carries a tag.
--idea-external-color--idea-id-colorThe underline an outbound link takes on hover, in a references block or an idea page’s footer—so a link that leaves your rookery reads differently from one that stays in it.