@media (max-width: 800px) {
  :root[data-theme='light'] .welcome-mark{width:min(88vw,520px);padding:26px 22px}
  .topbar { padding: 0 10px; gap: 5px; }
  .brand { font-size: 13px; }
  .nav { gap: 2px; min-width: 0; }
  .nav button { font-size: 9px; padding: 22px 2px; white-space: nowrap; }
  .actions { gap: 0; }
  .actions .primary, .actions .icon-btn { display: none; }
  .avatar { flex: 0 0 30px; }
}