/*
 * Warrly's offline stale indicator.
 *
 * The root layout links this file on every page. When the service worker has
 * just served a document from its page cache it answers this request with a
 * generated `body::before` amber bar naming the save time; on a network-fresh
 * page it answers with this empty stylesheet. Keeping the marker in a
 * stylesheet (instead of injecting a <style> into cached HTML) means React
 * hydration sees exactly the tree the server rendered.
 *
 * This file is the no-service-worker fallback: it intentionally has no rules.
 */