interface SplitViewCssAccordionProps {
    /** The document's custom CSS (raw author selectors). */
    customCSS?: string;
}
/**
 * Split View LEFT pane: a collapsible, READ-ONLY view of the document's custom
 * CSS, shown above the markdown source. Custom CSS is edited in the styling
 * palette (the single source of truth), not in the markdown pane — this is a
 * transparency affordance so the author can see what CSS is applied while in
 * markdown mode. Renders nothing when there is no custom CSS.
 */
export declare const SplitViewCssAccordion: ({ customCSS, }: SplitViewCssAccordionProps) => import("react/jsx-runtime").JSX.Element | null;
export {};