.app-update-notice {
  position: fixed;
  top: max(12px, env(safe-area-inset-top));
  inset-inline: max(12px, env(safe-area-inset-left)) max(12px, env(safe-area-inset-right));
  bottom: auto;
  z-index: 30;
  width: fit-content;
  max-width: min(440px, calc(100% - 24px));
  margin: 0 auto;
  padding: 8px 12px;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--surface);
  color: var(--text-secondary);
  font-size: 12px;
  line-height: 1.4;
  overflow-wrap: anywhere;
  pointer-events: none;
}
.app-update-notice[hidden] { display: none; }