@media (max-width: 768px) {
  .app-shell {
    padding: 14px;
  }

  .settings-grid {
    grid-template-columns: 1fr;
  }

  .topbar {
    flex-direction: column;
  }

  .mini-card {
    width: 50px;
    height: 70px;
    font-size: 18px;
  }
}