message: OK OK I think this is right
diff: position: fixed;
  backface-visibility: hidden;
  top: 44px;
  - @media all and (display-mode: standalone) {
  - .ios & {
  - top: 88px;
  - }
  - }
  + top: calc(44px + constant(safe-area-inset-top));
  + top: calc(44px + env(safe-area-inset-top));
  left: 0;
  width: 100%;
  z-index: 10;
  