/** Visible (keyboard-aware) viewport height, set on the desk root. */
export declare const DESK_HEIGHT_VAR = "--dc-desk-height";
/** Same height on <html>, for portaled bottom sheets. */
export declare const VISUAL_HEIGHT_VAR = "--dc-visual-height";
/**
 * Mirrors `visualViewport.height` into the height vars while `enabled` (resize only).
 * WebKit ignores `interactive-widget`; zoom is cancelled out with `scale`.
 */
export declare const useVisualViewportHeight: (el: HTMLElement | null, enabled: boolean) => void;
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