diff --git a/frontend/src/App.jsx b/frontend/src/App.jsx
index 76683e6..e6534ea 100644
--- a/frontend/src/App.jsx
+++ b/frontend/src/App.jsx
@@ -1,3 +1,4 @@
+import { useEffect, useState } from "react";
 import { Navigate, Route, Routes } from "react-router-dom";
 import { Toaster } from "sonner";
 
@@ -13,6 +14,23 @@ import { AuthCallbackPage } from "./pages/AuthCallbackPage";
  * can wrap `<App />` with a `MemoryRouter` if needed.
  */
 export default function App() {
+  const [isMobile, setIsMobile] = useState(false);
+
+  useEffect(() => {
+    const mediaQuery = window.matchMedia("(max-width: 640px)");
+
+    const updateViewport = () => {
+      setIsMobile(mediaQuery.matches);
+    };
+
+    updateViewport();
+    mediaQuery.addEventListener("change", updateViewport);
+
+    return () => {
+      mediaQuery.removeEventListener("change", updateViewport);
+    };
+  }, []);
+
   return (
     <AuthProvider>
       <Routes>
@@ -24,20 +42,24 @@ export default function App() {
       </Routes>
 
       <Toaster
-        position="bottom-right"
+        position={isMobile ? "bottom-center" : "bottom-right"}
         richColors
         closeButton
+        expand
         theme="light"
+        visibleToasts={4}
+        offset={20}
+        mobileOffset={{ bottom: 12, left: 12, right: 12 }}
         toastOptions={{ duration: 4000 }}
         style={{
           /* SUCCESS — ORCID corporate green */
-          '--success-bg': '#EAF3DE',
-          '--success-border': '#C0DD97',
-          '--success-text': '#3B6D11',
+          "--success-bg": "#EAF3DE",
+          "--success-border": "#C0DD97",
+          "--success-text": "#3B6D11",
           /* ERROR — hue-0° mirror of the ORCID green (same saturation & lightness) */
-          '--error-bg': '#F3DDDD',
-          '--error-border': '#DD9797',
-          '--error-text': '#6E1111',
+          "--error-bg": "#F3DDDD",
+          "--error-border": "#DD9797",
+          "--error-text": "#6E1111",
         }}
       />
     </AuthProvider>
diff --git a/frontend/src/components/dashboard/ExportDropdown.jsx b/frontend/src/components/dashboard/ExportDropdown.jsx
index 88e38d8..49729c9 100644
--- a/frontend/src/components/dashboard/ExportDropdown.jsx
+++ b/frontend/src/components/dashboard/ExportDropdown.jsx
@@ -16,6 +16,7 @@ import {
 export function ExportDropdown({
   onExport,
   exportingFormat = null,
+  disabled = false,
   selectedCount = 0,
   isAuthenticated = false,
   newPublicationsCount = 0,
@@ -61,7 +62,7 @@ export function ExportDropdown({
       <button
         type="button"
         onClick={handleDownload}
-        disabled={isBusy || nothingToDownload}
+        disabled={disabled || isBusy || nothingToDownload}
         className="inline-flex w-full items-center justify-center gap-2 rounded-lg border border-surface-border-strong bg-surface-primary px-[18px] py-2.5 text-sm font-medium text-ink-primary transition-colors enabled:hover:bg-surface-secondary disabled:cursor-not-allowed disabled:opacity-70 sm:w-auto"
       >
         {isBusy ? (
diff --git a/frontend/src/components/dashboard/SyncButton.jsx b/frontend/src/components/dashboard/SyncButton.jsx
index bca8420..0a95dd2 100644
--- a/frontend/src/components/dashboard/SyncButton.jsx
+++ b/frontend/src/components/dashboard/SyncButton.jsx
@@ -5,9 +5,15 @@ import { Spinner } from "../ui/Spinner";
  * Primary action button on the dashboard. Swaps icon + colour scheme
  * depending on the sync lifecycle (idle → loading → success flash).
  */
-export function SyncButton({ onClick, status = "idle", className = "" }) {
+export function SyncButton({
+  onClick,
+  status = "idle",
+  disabled = false,
+  className = "",
+}) {
   const isLoading = status === "loading";
   const isSuccess = status === "success";
+  const isDisabled = disabled || isLoading || isSuccess;
 
   const palette = isSuccess
     ? "bg-orcid-green-soft text-orcid-green-text border border-orcid-green-border"
@@ -19,7 +25,7 @@ export function SyncButton({ onClick, status = "idle", className = "" }) {
     <button
       type="button"
       onClick={onClick}
-      disabled={isLoading}
+      disabled={isDisabled}
       className={`inline-flex items-center justify-center gap-2 rounded-lg px-[18px] py-2.5 text-sm font-medium transition-colors disabled:cursor-not-allowed ${palette} ${className}`.trim()}
     >
       {isLoading ? (
diff --git a/frontend/src/index.css b/frontend/src/index.css
index de2e2b1..c155ede 100644
--- a/frontend/src/index.css
+++ b/frontend/src/index.css
@@ -80,3 +80,94 @@ body {
   -webkit-font-smoothing: antialiased;
   -moz-osx-font-smoothing: grayscale;
 }
+
+/* Sonner toaster UX polish (desktop + mobile). */
+[data-sonner-toaster] {
+  --normal-width: min(92vw, 560px);
+  --width: min(92vw, 560px);
+  --border-radius: 16px;
+}
+
+[data-sonner-toaster][data-y-position="top"] {
+  top: max(12px, env(safe-area-inset-top));
+}
+
+[data-sonner-toast] {
+  padding: 14px 16px;
+  border: 1px solid var(--color-surface-border-strong);
+  box-shadow:
+    0 14px 34px rgba(16, 24, 40, 0.14),
+    0 3px 10px rgba(16, 24, 40, 0.08);
+}
+
+[data-sonner-toast] [data-title] {
+  font-size: 1rem;
+  font-weight: 700;
+  line-height: 1.25;
+  letter-spacing: -0.01em;
+}
+
+[data-sonner-toast] [data-description] {
+  margin-top: 4px;
+  font-size: 0.94rem;
+  line-height: 1.45;
+  color: var(--color-ink-secondary);
+}
+
+/* Large hit-area + clear visual state for close button. */
+[data-sonner-toast] [data-close-button] {
+  width: 36px;
+  height: 36px;
+  border-radius: 999px;
+  border: 1px solid var(--color-surface-border-strong);
+  background: #fff;
+  color: var(--color-ink-secondary);
+  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.08);
+}
+
+[data-sonner-toast] [data-close-button]:hover {
+  background: #f8f7f3;
+  color: var(--color-ink-primary);
+}
+
+[data-sonner-toast] [data-close-button]:focus-visible {
+  outline: 2px solid var(--color-brand-accent);
+  outline-offset: 2px;
+}
+
+[data-sonner-toast] [data-button] {
+  min-height: 36px;
+  border-radius: 10px;
+  font-weight: 600;
+}
+
+@media (max-width: 640px) {
+  [data-sonner-toaster] {
+    --normal-width: min(90vw, 380px);
+    --width: min(90vw, 380px);
+  }
+
+  [data-sonner-toast] {
+    padding: 12px 12px 10px;
+  }
+
+  [data-sonner-toast] [data-title] {
+    font-size: 0.95rem;
+    line-height: 1.3;
+  }
+
+  [data-sonner-toast] [data-description] {
+    font-size: 0.9rem;
+    line-height: 1.4;
+  }
+
+  /* 44x44 touch target for thumbs on mobile. */
+  [data-sonner-toast] [data-close-button] {
+    width: 40px;
+    height: 40px;
+  }
+
+  [data-sonner-toast] [data-button] {
+    min-height: 40px;
+  }
+}
diff --git a/frontend/src/pages/DashboardPage.jsx b/frontend/src/pages/DashboardPage.jsx
index b0c60a4..23b19ee 100644
--- a/frontend/src/pages/DashboardPage.jsx
+++ b/frontend/src/pages/DashboardPage.jsx
@@ -23,6 +23,12 @@ import {
 import { useAuth } from "../contexts/AuthContext";
 
 const SUCCESS_FLASH_MS = 3000;
+/** Minimum gap between sync requests (protects backend + avoids toast spam). */
+const SYNC_COOLDOWN_MS = 5000;
+const SYNC_TOAST_ID = "researcher-sync";
+/** Minimum gap between export requests (protects backend + avoids toast spam). */
+const EXPORT_COOLDOWN_MS = 5000;
+const EXPORT_TOAST_ID = "researcher-export";
 
 /**
  * Researcher detail page. Owns:
@@ -52,7 +58,15 @@ export function DashboardPage() {
   const [pubsError, setPubsError] = useState(null);
 
   const [syncStatus, setSyncStatus] = useState("idle"); // idle | loading | success
+  const [syncCooldownActive, setSyncCooldownActive] = useState(false);
+  const syncInFlightRef = useRef(false);
+  const syncCooldownUntilRef = useRef(0);
+  const syncCooldownTimerRef = useRef(null);
   const [exportingFormat, setExportingFormat] = useState(null);
+  const [exportCooldownActive, setExportCooldownActive] = useState(false);
+  const exportInFlightRef = useRef(false);
+  const exportCooldownUntilRef = useRef(0);
+  const exportCooldownTimerRef = useRef(null);
   const [exportDestination, setExportDestination] = useState(
     DEFAULT_EXPORT_DESTINATION,
   );
@@ -110,12 +124,60 @@ export function DashboardPage() {
     return () => ctrl.abort();
   }, [orcid, loadBundle]);
 
+  useEffect(() => {
+    return () => {
+      if (syncCooldownTimerRef.current) {
+        clearTimeout(syncCooldownTimerRef.current);
+      }
+      if (exportCooldownTimerRef.current) {
+        clearTimeout(exportCooldownTimerRef.current);
+      }
+    };
+  }, []);
+
+  const syncDisabled = syncStatus !== "idle" || syncCooldownActive;
+  const exportDisabled = Boolean(exportingFormat) || exportCooldownActive;
+
+  function startSyncCooldown() {
+    syncCooldownUntilRef.current = Date.now() + SYNC_COOLDOWN_MS;
+    setSyncCooldownActive(true);
+    if (syncCooldownTimerRef.current) {
+      clearTimeout(syncCooldownTimerRef.current);
+    }
+    syncCooldownTimerRef.current = setTimeout(() => {
+      setSyncCooldownActive(false);
+      syncCooldownTimerRef.current = null;
+    }, SYNC_COOLDOWN_MS);
+  }
+
+  function startExportCooldown() {
+    exportCooldownUntilRef.current = Date.now() + EXPORT_COOLDOWN_MS;
+    setExportCooldownActive(true);
+    if (exportCooldownTimerRef.current) {
+      clearTimeout(exportCooldownTimerRef.current);
+    }
+    exportCooldownTimerRef.current = setTimeout(() => {
+      setExportCooldownActive(false);
+      exportCooldownTimerRef.current = null;
+    }, EXPORT_COOLDOWN_MS);
+  }
+
   if (!isValidOrcid(orcid)) {
     return <Navigate to="/" replace />;
   }
 
   async function handleSync() {
+    if (
+      syncInFlightRef.current ||
+      syncStatus !== "idle" ||
+      Date.now() < syncCooldownUntilRef.current
+    ) {
+      return;
+    }
+
+    syncInFlightRef.current = true;
     setSyncStatus("loading");
+
     try {
       const bundle = await syncResearcher(orcid);
       setResearcher(bundle.researcher);
@@ -132,6 +194,7 @@ export function DashboardPage() {
       const { newRecords, updatedRecords, totalRecords } = bundle;
       const hasChanges = newRecords > 0 || updatedRecords > 0;
       toast.success("Sincronización completada", {
+        id: SYNC_TOAST_ID,
         description: hasChanges
           ? `${newRecords} nuevas · ${updatedRecords} actualizadas (${totalRecords} total).`
           : "Sin cambios desde la última sincronización.",
@@ -140,12 +203,25 @@ export function DashboardPage() {
     } catch (err) {
       setSyncStatus("idle");
       toast.error("Error al sincronizar con ORCID", {
+        id: SYNC_TOAST_ID,
         description: err?.message ?? "Inténtalo de nuevo más tarde.",
       });
+    } finally {
+      syncInFlightRef.current = false;
+      startSyncCooldown();
     }
   }
 
   async function handleExport(format, profile = DEFAULT_EXPORT_DESTINATION) {
+    if (
+      exportInFlightRef.current ||
+      exportingFormat ||
+      Date.now() < exportCooldownUntilRef.current
+    ) {
+      return;
+    }
+
+    exportInFlightRef.current = true;
     setExportingFormat(format);
     try {
       let ids;
@@ -157,9 +233,9 @@ export function DashboardPage() {
         ids = newPublicationIds;
         if (ids.length === 0) {
           toast.info("No hay publicaciones nuevas", {
+            id: EXPORT_TOAST_ID,
             description: "Ya has descargado todas las publicaciones de este investigador.",
           });
-          setExportingFormat(null);
           return;
         }
       } else {
@@ -195,14 +271,18 @@ export function DashboardPage() {
         scope = "todo el investigador";
       }
       toast.success(`Exportación ${format.toUpperCase()} completada`, {
+        id: EXPORT_TOAST_ID,
         description: scope,
       });
     } catch (err) {
       toast.error(`Error al exportar ${format.toUpperCase()}`, {
+        id: EXPORT_TOAST_ID,
         description: err?.message ?? "No se pudo generar el fichero.",
       });
     } finally {
       setExportingFormat(null);
+      exportInFlightRef.current = false;
+      startExportCooldown();
     }
   }
 
@@ -227,11 +307,13 @@ export function DashboardPage() {
                   <SyncButton
                     onClick={handleSync}
                     status={syncStatus}
+                    disabled={syncDisabled}
                     className="w-full sm:w-auto"
                   />
                   <ExportDropdown
                     onExport={handleExport}
                     exportingFormat={exportingFormat}
+                    disabled={exportDisabled}
                     selectedCount={selectedIds.size}
                     isAuthenticated={isAuthenticated}
                     newPublicationsCount={newPublicationIds.length}
diff --git a/frontend/src/pages/GroupResultsPage.jsx b/frontend/src/pages/GroupResultsPage.jsx
index 68c1a46..728eb2e 100644
--- a/frontend/src/pages/GroupResultsPage.jsx
+++ b/frontend/src/pages/GroupResultsPage.jsx
@@ -17,12 +17,15 @@ import { downloadExport, searchResearchersBulk } from "../services/api";
 import {
   DEFAULT_EXPORT_DESTINATION,
   DEFAULT_EXPORT_PROFILE,
-  EXPORT_ZIP_DESTINATION,
+  resolveExportFromDestination,
   swordXmlFilename,
 } from "../utils/exportProfiles";
 import { ExportDropdown } from "../components/dashboard/ExportDropdown";
 import { useAuth } from "../contexts/AuthContext";
 
+const EXPORT_COOLDOWN_MS = 5000;
+const GLOBAL_EXPORT_TOAST_ID = "group-export-global";
+
 /**
  * Group results view: shows one summary card per researcher, plus a global
  * "download all new" (or "download everything") action in the header.
@@ -44,11 +47,23 @@ export function GroupResultsPage() {
   const [globalExportDestination, setGlobalExportDestination] = useState(
     DEFAULT_EXPORT_DESTINATION,
   );
-  const [swordProfile, setSwordProfile] = useState(DEFAULT_EXPORT_PROFILE);
 
   // Track per-researcher export state (format | null)
   const [cardExporting, setCardExporting] = useState({});
 
+  const [globalExportCooldownActive, setGlobalExportCooldownActive] =
+    useState(false);
+  const globalExportInFlightRef = useRef(false);
+  const globalExportCooldownUntilRef = useRef(0);
+  const globalExportCooldownTimerRef = useRef(null);
+
+  const [cardExportCooldownActive, setCardExportCooldownActive] = useState(
+    {},
+  );
+  const cardExportInFlightRef = useRef(new Set());
+  const cardExportCooldownUntilRef = useRef({});
+  const cardExportCooldownTimerRef = useRef({});
+
   const abortRef = useRef(null);
 
   useEffect(() => {
@@ -95,6 +110,54 @@ export function GroupResultsPage() {
     return () => ctrl.abort();
   }, [orcidIds, navigate]);
 
+  useEffect(() => {
+    const cardTimersObj = cardExportCooldownTimerRef.current;
+    return () => {
+      const globalTimer = globalExportCooldownTimerRef.current;
+      if (globalTimer) {
+        clearTimeout(globalTimer);
+      }
+      for (const t of Object.values(cardTimersObj)) {
+        clearTimeout(t);
+      }
+    };
+  }, []);
+
+  function startGlobalExportCooldown() {
+    globalExportCooldownUntilRef.current = Date.now() + EXPORT_COOLDOWN_MS;
+    setGlobalExportCooldownActive(true);
+
+    if (globalExportCooldownTimerRef.current) {
+      clearTimeout(globalExportCooldownTimerRef.current);
+    }
+    globalExportCooldownTimerRef.current = setTimeout(() => {
+      setGlobalExportCooldownActive(false);
+      globalExportCooldownUntilRef.current = 0;
+      globalExportCooldownTimerRef.current = null;
+    }, EXPORT_COOLDOWN_MS);
+  }
+
+  function startCardExportCooldown(orcidId) {
+    const until = Date.now() + EXPORT_COOLDOWN_MS;
+    cardExportCooldownUntilRef.current[orcidId] = until;
+    setCardExportCooldownActive((prev) => ({
+      ...prev,
+      [orcidId]: true,
+    }));
+
+    if (cardExportCooldownTimerRef.current[orcidId]) {
+      clearTimeout(cardExportCooldownTimerRef.current[orcidId]);
+    }
+    cardExportCooldownTimerRef.current[orcidId] = setTimeout(() => {
+      setCardExportCooldownActive((prev) => ({
+        ...prev,
+        [orcidId]: false,
+      }));
+      cardExportCooldownUntilRef.current[orcidId] = 0;
+      cardExportCooldownTimerRef.current[orcidId] = null;
+    }, EXPORT_COOLDOWN_MS);
+  }
+
   // All new publication IDs across all loaded researchers
   const allNewIds = useMemo(() => {
     if (!isAuthenticated) return [];
@@ -110,25 +173,30 @@ export function GroupResultsPage() {
     [results],
   );
 
-  function handleGlobalExportDestinationChange(nextDestination) {
-    setGlobalExportDestination(nextDestination);
-    // Keep last XML profile for card-level exports.
-    if (nextDestination !== EXPORT_ZIP_DESTINATION) {
-      setSwordProfile(nextDestination);
-    }
-  }
-
   async function handleGlobalExport(format, profile = DEFAULT_EXPORT_PROFILE) {
+    if (
+      globalExportInFlightRef.current ||
+      Date.now() < globalExportCooldownUntilRef.current
+    ) {
+      return;
+    }
+
     const ids = isAuthenticated ? allNewIds : allIds;
     if (ids.length === 0) {
       toast.info(
         isAuthenticated
           ? "No hay publicaciones nuevas"
           : "No hay publicaciones para exportar",
-        { description: "No se encontraron publicaciones en los investigadores cargados." },
+        {
+          id: GLOBAL_EXPORT_TOAST_ID,
+          description:
+            "No se encontraron publicaciones en los investigadores cargados.",
+        },
       );
       return;
     }
+
+    globalExportInFlightRef.current = true;
     setGlobalExporting(format);
     try {
       // For bulk export we send all IDs together, passing a placeholder orcid
@@ -151,14 +219,18 @@ export function GroupResultsPage() {
         URL.revokeObjectURL(objectUrl);
       }
       toast.success(`Exportación ${format.toUpperCase()} completada`, {
+        id: GLOBAL_EXPORT_TOAST_ID,
         description: `${ids.length} publicaciones exportadas.`,
       });
     } catch (err) {
       toast.error(`Error al exportar ${format.toUpperCase()}`, {
+        id: GLOBAL_EXPORT_TOAST_ID,
         description: err?.message ?? "No se pudo generar el fichero.",
       });
     } finally {
       setGlobalExporting(null);
+      globalExportInFlightRef.current = false;
+      startGlobalExportCooldown();
     }
   }
 
@@ -169,11 +241,22 @@ export function GroupResultsPage() {
     totalIds,
     profile = DEFAULT_EXPORT_PROFILE,
   ) {
-    const ids = isAuthenticated ? newIds : totalIds;
-    if (ids.length === 0) {
-      toast.info("No hay publicaciones para exportar");
+    if (cardExportInFlightRef.current.has(orcidId)) {
       return;
     }
+    const now = Date.now();
+    const until = cardExportCooldownUntilRef.current[orcidId] ?? 0;
+    if (now < until) return;
+
+    const ids = isAuthenticated ? newIds : totalIds;
+    if (ids.length === 0) {
+      toast.info("No hay publicaciones para exportar", {
+        id: `group-export-card-${orcidId}`,
+      });
+      return;
+    }
+
+    cardExportInFlightRef.current.add(orcidId);
     setCardExporting((prev) => ({ ...prev, [orcidId]: format }));
     try {
       const { blob } = await downloadExport(orcidId, format, {
@@ -194,10 +277,12 @@ export function GroupResultsPage() {
         URL.revokeObjectURL(objectUrl);
       }
       toast.success(`Exportación ${format.toUpperCase()} completada`, {
+        id: `group-export-card-${orcidId}`,
         description: `${ids.length} publicaciones de ${orcidId}.`,
       });
     } catch (err) {
       toast.error(`Error al exportar ${format.toUpperCase()}`, {
+        id: `group-export-card-${orcidId}`,
         description: err?.message ?? "No se pudo generar el fichero.",
       });
     } finally {
@@ -206,6 +291,8 @@ export function GroupResultsPage() {
         delete next[orcidId];
         return next;
       });
+      cardExportInFlightRef.current.delete(orcidId);
+      startCardExportCooldown(orcidId);
     }
   }
 
@@ -250,11 +337,14 @@ export function GroupResultsPage() {
               <ExportDropdown
                 onExport={handleGlobalExport}
                 exportingFormat={globalExporting}
+                disabled={
+                  Boolean(globalExporting) || globalExportCooldownActive
+                }
                 selectedCount={0}
                 isAuthenticated={isAuthenticated}
                 newPublicationsCount={allNewIds.length}
                 exportDestination={globalExportDestination}
-                onExportDestinationChange={handleGlobalExportDestinationChange}
+                onExportDestinationChange={setGlobalExportDestination}
               />
             )}
           </div>
@@ -281,15 +371,22 @@ export function GroupResultsPage() {
                   bundle={bundle}
                   isAuthenticated={isAuthenticated}
                   exporting={cardExporting[bundle.researcher?.orcid_id] ?? null}
-                  onExport={(fmt, newIds, totalIds) =>
+                  exportCooldownActive={
+                    cardExportCooldownActive[bundle.researcher?.orcid_id] ??
+                    false
+                  }
+                  onExport={(newIds, totalIds) => {
+                    const { format, profile } = resolveExportFromDestination(
+                      globalExportDestination,
+                    );
                     handleCardExport(
                       bundle.researcher?.orcid_id,
-                      fmt,
+                      format,
                       newIds,
                       totalIds,
-                      swordProfile,
-                    )
-                  }
+                      profile ?? DEFAULT_EXPORT_PROFILE,
+                    );
+                  }}
                 />
               ))}
             </div>
@@ -349,6 +446,7 @@ function ResearcherResultCard({
   bundle,
   isAuthenticated,
   exporting,
+  exportCooldownActive,
   onExport,
 }) {
   const researcher = bundle.researcher ?? {};
@@ -419,92 +517,64 @@ function ResearcherResultCard({
         >
           Ver detalle
         </Link>
-        <ExportFormatMenu
-          onExport={(fmt) => onExport(fmt, newIds, allPubIds)}
+        <CardExportButton
+          onClick={() => onExport(newIds, allPubIds)}
           exporting={exporting}
           isAuthenticated={isAuthenticated}
           hasNew={hasNew}
           newCount={newCount}
           totalCount={totalRecords}
+          exportCooldownActive={exportCooldownActive}
         />
       </div>
     </div>
   );
 }
 
-/* ─────────────────────── Inline export format picker ─────────────────── */
+/* ─────────────────────── Per-card download button ────────────────────── */
 
-function ExportFormatMenu({
-  onExport,
+function CardExportButton({
+  onClick,
   exporting,
   isAuthenticated,
   hasNew,
   newCount,
   totalCount,
+  exportCooldownActive,
 }) {
-  const [open, setOpen] = useState(false);
-  const ref = useRef(null);
-
-  useEffect(() => {
-    function handleClick(e) {
-      if (ref.current && !ref.current.contains(e.target)) setOpen(false);
-    }
-    document.addEventListener("mousedown", handleClick);
-    return () => document.removeEventListener("mousedown", handleClick);
-  }, []);
-
   const isBusy = Boolean(exporting);
   const disabled =
-    isBusy || (isAuthenticated && !hasNew && totalCount > 0 && newCount === 0);
+    isBusy ||
+    exportCooldownActive ||
+    (isAuthenticated && !hasNew && totalCount > 0 && newCount === 0);
 
   let label;
   if (isBusy) {
-    label = `Exportando ${exporting.toUpperCase()}...`;
+    label = `Descargando ${exporting.toUpperCase()}...`;
+  } else if (exportCooldownActive) {
+    label = "Espera un momento...";
   } else if (isAuthenticated) {
-    label = hasNew ? `Nuevo (${newCount})` : "Descargado";
+    label = hasNew ? `Descargar (${newCount})` : "Todo descargado";
   } else {
-    label = `Todo (${totalCount})`;
+    label = `Descargar (${totalCount})`;
   }
 
   return (
-    <div className="relative" ref={ref}>
-      <button
-        type="button"
-        onClick={() => setOpen((o) => !o)}
-        disabled={disabled}
-        className="inline-flex items-center gap-1.5 rounded-lg border border-surface-border-strong bg-surface-primary px-3 py-2 text-[13px] font-medium text-ink-primary transition-colors enabled:hover:bg-surface-secondary disabled:cursor-not-allowed disabled:opacity-60"
-      >
-        {isBusy ? (
-          <Spinner size={13} />
-        ) : hasNew ? (
-          <SparkleIcon size={11} className="text-brand-accent" />
-        ) : (
-          <DownloadIcon size={13} />
-        )}
-        {label}
-      </button>
-
-      {open && (
-        <div className="absolute right-0 top-[calc(100%+4px)] z-50 min-w-[160px] overflow-hidden rounded-xl border border-surface-border-strong bg-surface-primary shadow-lg">
-          {["xml", "zip"].map((fmt, idx) => (
-            <button
-              key={fmt}
-              type="button"
-              onClick={() => {
-                setOpen(false);
-                onExport(fmt);
-              }}
-              className={`flex w-full items-center gap-2 px-3 py-2.5 text-left text-[13px] font-medium text-ink-primary transition-colors hover:bg-surface-secondary ${
-                idx === 0 ? "border-b border-surface-border/60" : ""
-              }`}
-            >
-              <DownloadIcon size={13} />
-              {fmt.toUpperCase()}
-            </button>
-          ))}
-        </div>
+    <button
+      type="button"
+      onClick={onClick}
+      disabled={disabled}
+      className="inline-flex flex-1 items-center justify-center gap-1.5 rounded-lg border border-surface-border-strong bg-surface-primary px-3 py-2 text-[13px] font-medium text-ink-primary transition-colors enabled:hover:bg-surface-secondary disabled:cursor-not-allowed disabled:opacity-60 sm:flex-none"
+    >
+      {isBusy ? (
+        <Spinner size={13} />
+      ) : hasNew ? (
+        <SparkleIcon size={11} className="text-brand-accent" />
+      ) : (
+        <DownloadIcon size={13} />
       )}
-    </div>
+      {label}
+    </button>
   );
 }