import { AuthCardVariant } from './resolve-auth-input-variant.js';
/**
 * Visual nesting level used by Athena surface composition.
 *
 * Distinct from {@link AuthCardVariant} / HeroUI `Card`: a Card is a semantic
 * section container. This type describes the painted depth descendants should
 * nest into. `transparent` means “on the page” (no Athena surface provider).
 */
export type AuthVisualSurface = "transparent" | "default" | "secondary" | "tertiary";
export type AuthNestedVisualSurface = Exclude<AuthVisualSurface, "transparent">;
/**
 * Map a resolved HeroUI card variant onto Athena’s visual surface scale.
 *
 * Explicit so components never string-cast `Card` variants into `Surface`
 * variants.
 */
export declare function authCardVariantToVisualSurface(variant: AuthCardVariant): AuthVisualSurface;
/**
 * Resolve the visual surface for a nested region relative to its parent.
 *
 * The hierarchy deepens monotonically and never cycles:
 * transparent → default → secondary → tertiary → tertiary.
 */
export declare function resolveNestedAuthSurface(parent: AuthVisualSurface): AuthNestedVisualSurface;