/**
 * Single-source mobile breakpoint matcher used by the demo / drop-in
 * viewer to decide whether to render touch-first chrome (slide-in
 * tools drawer, bottom-sheet readouts) instead of the desktop
 * sidebar / floating-tooltip layout.
 *
 * The default breakpoint matches Tailwind's `md` (768 px). Pass a
 * custom value to override per-component.
 *
 * SSR-safe: returns `false` on the server (assumes desktop) so the
 * first paint matches the static HTML, then re-evaluates on mount.
 *
 * @public
 */
export declare function useIsMobile(maxWidthPx?: number): boolean;
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