(defcomp
  ()
  (div
    (~tw :tokens "space-y-3")
    (form
      :sx-post "/sx/(geography.(hypermedia.(reference.(api.echo-vals))))"
      :sx-target "#ref-params-result"
      :sx-swap "innerHTML"
      :sx-params "name"
      (~tw :tokens "flex gap-2")
      (input
        :type "text"
        :name "name"
        :placeholder "Name (sent)"
        (~tw :tokens "flex-1 px-3 py-2 border border-stone-300 rounded text-sm focus:outline-none focus:ring-2 focus:ring-violet-500"))
      (input
        :type "text"
        :name "secret"
        :placeholder "Secret (filtered)"
        (~tw :tokens "flex-1 px-3 py-2 border border-stone-300 rounded text-sm focus:outline-none focus:ring-2 focus:ring-violet-500"))
      (button
        :type "submit"
        (~tw :tokens "px-4 py-2 bg-violet-600 text-white rounded hover:bg-violet-700 transition-colors text-sm")
        "Submit"))
    (div
      :id "ref-params-result"
      (~tw :tokens "p-3 rounded bg-stone-100 text-stone-400 text-sm")
      "Only 'name' will be sent — 'secret' is filtered by sx-params.")))