/* Telegram iOS lets scrolled content paint above its web view, behind the URL
   controls. Fixed layers are clipped there; the sticky box's own background is
   not. Keep it above the viewport without adding space or intercepting taps.
   See https://github.com/TelegramMessenger/Telegram-iOS/issues/2347 */
body {
  display: flow-root; /* contain the cover's negative margin */
}

.browser-top-cover {
  position: sticky;
  top: -200px;
  height: 200px;
  margin-top: -200px;
  z-index: 2147483000;
  background: #000;
  pointer-events: none;
}