/**
 * Central debug feature helpers: DOM inspection, hit-area visualization, legacy CSS overlays.
 * Observers attach only while a feature is active; highlights use pointer-events-safe patterns.
 */
export declare function shouldSkipInspectableElement(element: HTMLElement): boolean;
/** True if element has a Bazza hit-area utility class (not the debug-only class). */
export declare function hasHitAreaUtilityClass(element: HTMLElement): boolean;
export interface HitAreaDebugController {
    mount: () => void;
    unmount: () => void;
}
/**
 * Adds Bazza hit-area-debug to elements with hit-area-* utilities while active.
 * Rescans on DOM mutations (throttled rAF). See https://bazza.dev/craft/2026/hit-area
 */
export declare function createHitAreaDebugController(): HitAreaDebugController;
/** Fixed overlay root for future feature visualizers (pointer-events: none, z-debug). */
export declare function ensureDebugOverlayRoot(): HTMLElement | null;
export declare function removeDebugOverlayRoot(): void;
export interface LegacyDebugStyleOptions {
    borders: boolean;
    shadows: boolean;
    pixelGrid: boolean;
}
/**
 * Legacy full-page debug CSS (borders, shadows, 8px background pixel grid — not CSS Grid inspector).
 */
export declare function buildLegacyDebugCss(opts: LegacyDebugStyleOptions): string;
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