= UI Element Style and Behavior Guide:navtitle: UI Element Styles and BehaviorsWhen creating a UI theme for Antora, there are certain elements in the UI that require support from the CSS--as well as JavaScript in some cases--to work correctly.This list includes elements in the shell (i.e., frame) and in the document content.This document identifies these UI elements.//== UI Shell// TODO== Document ContentThe HTML in the main content area is generated from AsciiDoc using Asciidoctor.AsciiDoc has numerous content elements that require assistance from CSS to render properly.These elements include:* xref:inline-text-styles.adoc[Inline text emphasis]* xref:admonition-styles.adoc[Admonitions]* xref:list-styles.adoc[Lists]* xref:sidebar-styles.adoc[Sidebars]* xref:ui-macro-styles.adoc[Button, keybinding, and menu UI macros]* xref:code-blocks.adoc[Code blocks]