/**
 * Shared utilities for flux renderers.
 *
 * Each renderer imports from here to keep variant-driven style composition
 * consistent and to funnel the React-element → FluxElement cast through a
 * single audited location.
 */
import * as React from "react";
import type { CSSProperties, ReactElement, ReactNode } from "react";
import type { FluxElement, FluxRenderContext } from "./types.js";
/**
 * Cast a React element to the structural FluxElement interface. The
 * generated types intentionally keep FluxElement react-agnostic; this
 * shim is the single boundary where we accept the narrowing.
 */
export declare function asFluxElement(element: ReactElement): FluxElement;
/** Shorthand for ``React.createElement`` with a narrowed FluxElement return. */
export declare function h(type: string | React.ComponentType<Record<string, unknown>>, props: Record<string, unknown> | null, ...children: ReactNode[]): ReactElement;
/**
 * Build a CSS variable reference string.
 *
 *   tokenVar("color.primary.solid") → "var(--flux-color-primary-solid)"
 */
export declare function tokenVar(path: string, fallback?: string): string;
/**
 * Resolve a single value from the flux catalog's variant style shape. If
 * the value starts with ``$``, convert to a ``var(--flux-…)`` reference;
 * otherwise pass through untouched.
 */
export declare function resolveValue(value: unknown): unknown;
/**
 * Convert an object of token-referencing style properties to a runtime
 * CSSProperties object. Also converts camelCase CSS props to the shape
 * React expects (React already uses camelCase — so this is largely a
 * token-resolution pass with type narrowing).
 */
export declare function resolveStyle(style: Record<string, unknown> | undefined): CSSProperties;
/**
 * Merge an ordered list of style dicts. Later entries win. Undefined
 * values are treated as "don't set".
 */
export declare function mergeStyles(...styles: Array<CSSProperties | undefined>): CSSProperties;
/** Look up a slot node (by id) via ctx.renderers. */
export declare function renderSlot(slotId: unknown, ctx: FluxRenderContext, parentId: string, slotName: string): ReactElement | null;
/** Return the first non-nullish value. */
export declare function firstDefined<T>(...values: Array<T | undefined | null>): T | undefined;
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