export type Brand = 'gs' | 'sk';
/**
 * Hostname-based brand fallback for callers with no account/studio brand
 * signal yet: pre-auth render (before studio data loads) or an account with
 * no studio at all (e.g. platform Admin). Consumers own their own hostname
 * heuristics (env-aware, per-portal) — this is intentionally generic:
 * any hostname containing 'gostudent' resolves to 'gs', everything else to
 * 'sk'. Portals with more nuanced non-prod handling should compute their own
 * boolean/brand and pass it in via the `fallback` parameter of
 * `resolveBrand` instead of relying on this default.
 */
export declare function isSkBrand(hostname?: string): boolean;
/**
 * Resolves the FE brand/theme from the account/studio's computed `brand`
 * field (as returned by `GET /studio/user` / `GET /studio/user/main`).
 *
 * The backend already derives and normalizes `brand` to `'sk' | 'gs'` — this
 * helper just passes a valid value through defensively (trimming whitespace,
 * normalizing casing) and falls back to hostname-based resolution when
 * `brand` is `undefined`/`null`/empty/unrecognized. That fallback covers:
 * pre-auth render (before studio data has loaded) and accounts with no
 * studio at all (e.g. platform Admin).
 *
 * Pure and side-effect free with respect to its `brand` argument — does not
 * read `window.location` itself unless the fallback path is taken (no
 * explicit `fallback` override supplied).
 */
export declare function resolveBrand(brand: Brand | string | null | undefined, fallback?: () => Brand): Brand;
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