/* Keep the actual game at its authored 16:9 aspect ratio. */
#mobile-orientation-hint { display: none; }
@media (orientation: portrait) and (pointer: coarse) {
  #mobile-orientation-hint {
    display: block; position: fixed; z-index: 20; top: max(14px, env(safe-area-inset-top));
    left: 18px; right: 18px; padding: 14px; border: 1px solid #3c6a7d;
    border-radius: 12px; background: #0d1729; color: #b9eef5;
    text-align: center; font: 15px/1.5 sans-serif; pointer-events: none;
  }
}