from playwright.sync_api import sync_playwright
URL='https://seaside.pacim.de/checkin.php?b=115266&h=ed2b5fb2b9c92c38670bfde0a8d2f7a0'
with sync_playwright() as pw:
    b=pw.chromium.launch()
    pg=b.new_page(viewport={'width':400,'height':820}, device_scale_factor=2)
    pg.goto(URL, wait_until='networkidle'); pg.wait_for_timeout(700)
    pg.click('.tab[data-tab="notizen"]'); pg.wait_for_timeout(700)
    d=pg.query_selector('.nt-hint-reply')
    print('reply details present:', bool(d))
    if d:
        print('open by default:', pg.eval_on_selector('.nt-hint-reply','e=>e.open'))
        # reply body visible when collapsed?
        print('reply body visible (collapsed):', pg.eval_on_selector('.nt-hint-reply .nt-hint-b','e=>e.offsetHeight>0'))
        pg.screenshot(path='/tmp/reply_collapsed.png')
        pg.click('.nt-hint-reply summary'); pg.wait_for_timeout(400)
        print('open after click:', pg.eval_on_selector('.nt-hint-reply','e=>e.open'))
        print('reply body visible (expanded):', pg.eval_on_selector('.nt-hint-reply .nt-hint-b','e=>e.offsetHeight>0'))
        pg.screenshot(path='/tmp/reply_expanded.png')
    b.close()