Opened the public homepage in Chrome while online. Once the page load event completed, enabled Playwright network offline emulation in that browser context. Uploaded a locally created 640x480 synthetic PNG, chose Clean Outline and A4, generated and saved the actual PNG download. Output measured 3508x2480. Test does not prove the site can load or reload offline, support all browsers, or work after browser cache eviction. See offline-test.mjs, offline-observation.json and measurements.json.