diff --git a/src/app/page.tsx b/src/app/page.tsx
index 1f3d30a..73f8ccb 100644
--- a/src/app/page.tsx
+++ b/src/app/page.tsx
@@ -20,6 +20,8 @@ import { ChevronUp, ChevronDown, Copy, Trash2, Anchor, Lock } from 'lucide-react
 export default function Home() {
   const [campaign, setCampaign] = useState<NewsletterCampaign>(DEFAULT_CAMPAIGN);
   const [selectedModuleId, setSelectedModuleId] = useState<string | null>('mod-products-fantasticky');
+  // Produkt otvorený v paneli (harmonika); nastaví sa aj klikom na produkt v náhľade
+  const [selectedProductId, setSelectedProductId] = useState<string | null>(null);
   const [isSaving, setIsSaving] = useState(false);
   const [isExportingBrevo, setIsExportingBrevo] = useState(false);
   const [brevoUrl, setBrevoUrl] = useState<string | null>(null);
@@ -667,6 +669,10 @@ export default function Home() {
             backgroundImage: 'linear-gradient(135deg, #005bb5 0%, #000d1a 100%)'
           }}
         >
+          {/* Zvýraznenie produktu otvoreného v paneli */}
+          {selectedProductId && (
+            <style>{`main [data-product-id="${selectedProductId.replace(/["\\]/g, '')}"] { outline: 3px solid #ef4444; outline-offset: 3px; }`}</style>
+          )}
           {/* E-mail Container 1:1 k originálu */}
           <div className="w-full max-w-[600px] my-4">
             {campaign.modules.map((mod, idx) => {
@@ -683,7 +689,16 @@ export default function Home() {
               return (
                 <div
                   key={mod.id}
-                  onClick={() => setSelectedModuleId(mod.id)}
+                  onClick={(e) => {
+                    // Klik na kartu produktu otvorí v paneli práve tento produkt
+                    const card = (e.target as HTMLElement).closest('[data-product-id]');
+                    if (card) {
+                      setSelectedProductId(card.getAttribute('data-product-id'));
+                    } else if (mod.id !== selectedModuleId) {
+                      setSelectedProductId(null);
+                    }
+                    setSelectedModuleId(mod.id);
+                  }}
                   className={`relative cursor-pointer transition-all duration-150 rounded-2xl ${
                     isSelected
                       ? 'ring-2 ring-offset-4 ring-offset-[#001a33] ring-red-500 shadow-2xl'
@@ -866,7 +881,11 @@ export default function Home() {
                       dangerouslySetInnerHTML={{
                         __html: renderSingleModuleHtml(mod, campaign)
                       }}
-                      className="pointer-events-none"
+                      onClick={(e) => {
+                        // odkazy v náhľade neotvárame, klik slúži na výber modulu / produktu
+                        if ((e.target as HTMLElement).closest('a')) e.preventDefault();
+                      }}
+                      className="[&_[data-product-id]]:cursor-pointer"
                     />
                   )}
                 </div>
@@ -879,6 +898,8 @@ export default function Home() {
         <aside className="w-96 flex-shrink-0 h-full bg-white shadow-2xl z-20">
           <ConfigPanel
             module={selectedModule}
+            selectedProductId={selectedProductId}
+            onSelectProduct={setSelectedProductId}
             onUpdateModule={handleUpdateModule}
             onApplyBadgeToAll={handleApplyBadgeToAll}
             onUpdateAllProductSections={handleUpdateAllProductSections}
diff --git a/src/components/editor/ConfigPanel.tsx b/src/components/editor/ConfigPanel.tsx
index d583e40..5d9bc2a 100644
--- a/src/components/editor/ConfigPanel.tsx
+++ b/src/components/editor/ConfigPanel.tsx
@@ -21,6 +21,9 @@ interface ConfigPanelProps {
   onOpenBadgeManager?: (productId: string) => void;
   onOpenImport?: () => void;
   availableBadges?: BadgeTemplate[];
+  // Otvorený produkt v harmonike (klik na produkt v náhľade ho otvorí)
+  selectedProductId?: string | null;
+  onSelectProduct?: (productId: string | null) => void;
 }
 
 // Jednoduchý HTML editor: vlastné HTML nahradí modul vygenerovaný z formulára
@@ -94,7 +97,9 @@ export const ConfigPanel: React.FC<ConfigPanelProps> = ({
   campaignValidity = '',
   onOpenBadgeManager,
   onOpenImport,
-  availableBadges = []
+  availableBadges = [],
+  selectedProductId = null,
+  onSelectProduct
 }) => {
   if (!module) {
     return (
@@ -660,7 +665,8 @@ export const ConfigPanel: React.FC<ConfigPanelProps> = ({
                 product={p}
                 index={pIdx}
                 variant="standard"
-                defaultOpen={pIdx === 0}
+                open={selectedProductId === p.id}
+                onToggle={() => onSelectProduct?.(selectedProductId === p.id ? null : p.id)}
                 availableBadges={availableBadges || []}
                 onChange={(patch) => updateProduct(pIdx, patch)}
                 onDelete={() => updateData({ products: (module.data.products || []).filter((_: ProductItem, i: number) => i !== pIdx) })}
@@ -845,7 +851,8 @@ export const ConfigPanel: React.FC<ConfigPanelProps> = ({
                 product={p}
                 index={pIdx}
                 variant="loyalty"
-                defaultOpen={pIdx === 0}
+                open={selectedProductId === p.id}
+                onToggle={() => onSelectProduct?.(selectedProductId === p.id ? null : p.id)}
                 availableBadges={availableBadges || []}
                 onChange={(patch) => updateProduct(pIdx, patch)}
                 onOpenBadgeEditor={onOpenBadgeManager ? () => onOpenBadgeManager(p.id) : undefined}
diff --git a/src/components/editor/ProductEditor.tsx b/src/components/editor/ProductEditor.tsx
index 730e274..e3ed5ad 100644
--- a/src/components/editor/ProductEditor.tsx
+++ b/src/components/editor/ProductEditor.tsx
@@ -2,7 +2,7 @@
 
 // Editor jedného produktu (bežné aj vernostné produkty) – zbalený po produktoch, len to, čo treba:
 // texty, fotka (zoom/posun), cenovka (šablóna, veľkosť, ceny), dostupnosť a ďalšie možnosti.
-import React, { useState } from 'react';
+import React, { useEffect, useRef } from 'react';
 import { BadgeTemplate, CardProduct } from '@/types/newsletter';
 import { ChevronDown, Trash2, Pencil, Globe, Layers } from 'lucide-react';
 import { ImageUploadInput } from './ImageUploadInput';
@@ -31,7 +31,8 @@ interface ProductEditorProps {
   index: number;
   variant: Variant;
   availableBadges: BadgeTemplate[];
-  defaultOpen?: boolean;
+  open: boolean; // harmonika: otvorený je vždy len jeden produkt
+  onToggle: () => void;
   onChange: (patch: Patch) => void;
   onDelete?: () => void;
   onOpenBadgeEditor?: () => void;
@@ -111,14 +112,19 @@ export const ProductEditor: React.FC<ProductEditorProps> = ({
   index,
   variant,
   availableBadges,
-  defaultOpen = false,
+  open,
+  onToggle,
   onChange,
   onDelete,
   onOpenBadgeEditor,
   onApplyBadgeToSection,
   onApplyBadgeToAll
 }) => {
-  const [open, setOpen] = useState(defaultOpen);
+  // Po otvorení (aj klikom na produkt v náhľade) posunieme panel na tento produkt
+  const rootRef = useRef<HTMLDivElement>(null);
+  useEffect(() => {
+    if (open) rootRef.current?.scrollIntoView({ block: 'start', behavior: 'smooth' });
+  }, [open]);
   const isLoyalty = variant === 'loyalty';
   const set = (key: string) => (v: unknown) => onChange({ [key]: v });
 
@@ -166,10 +172,13 @@ export const ProductEditor: React.FC<ProductEditorProps> = ({
   );
 
   return (
-    <div className="rounded-xl border border-gray-200 bg-gray-50 overflow-hidden">
+    <div
+      ref={rootRef}
+      className={`rounded-xl border bg-gray-50 overflow-hidden scroll-mt-2 ${open ? 'border-red-400 ring-1 ring-red-200' : 'border-gray-200'}`}
+    >
       {/* Hlavička produktu – klik rozbalí / zbalí */}
       <div className="flex items-center gap-2 px-2.5 py-2 bg-white">
-        <button type="button" onClick={() => setOpen(!open)} className="flex-1 flex items-center gap-2 min-w-0 text-left">
+        <button type="button" onClick={onToggle} className="flex-1 flex items-center gap-2 min-w-0 text-left">
           <span className="w-8 h-8 rounded-md bg-gray-100 border border-gray-200 shrink-0 overflow-hidden flex items-center justify-center">
             {p.imageUrl && (
               // eslint-disable-next-line @next/next/no-img-element
diff --git a/src/lib/productCard.ts b/src/lib/productCard.ts
index 9544421..4bbb73c 100644
--- a/src/lib/productCard.ts
+++ b/src/lib/productCard.ts
@@ -302,7 +302,7 @@ export function renderProductCard(p: CardProduct, ctx: CardContext): string {
   const key = cardVisualKey(p, ctx);
   const visual = ctx.mode === 'preview' ? renderVisualPreview(p, ctx, key) : renderVisualExport(p, ctx, key);
   return `
-    <table role="presentation" cellspacing="0" cellpadding="0" border="0" width="100%" height="100%" class="glass-product ${colorClass}" bgcolor="${bg}" style="background-color: ${bg}; border-radius: 16px; box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15); overflow: hidden; height: 100%;">
+    <table ${ctx.mode === 'preview' ? `data-product-id="${escapeHtml(p.id)}" ` : ''}role="presentation" cellspacing="0" cellpadding="0" border="0" width="100%" height="100%" class="glass-product ${colorClass}" bgcolor="${bg}" style="background-color: ${bg}; border-radius: 16px; box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15); overflow: hidden; height: 100%;">
         <tr>
             <td style="padding: 0; line-height: 0; font-size: 0; border-top-left-radius: 16px; border-top-right-radius: 16px;">
                 ${visual}