/* Offline banner only (bottom nav removed) */
.sb-offline {
  position: fixed; top: 0; left: 0; right: 0;
  background: #222; color: #fff; font-size: 14px; text-align: center;
  padding: .5rem; z-index: 1000; display: none;
}
.sb-offline.show { display: block; }