diff --git a/apps/admin/src/App.tsx b/apps/admin/src/App.tsx
index 94e0a83..ad9aacd 100644
--- a/apps/admin/src/App.tsx
+++ b/apps/admin/src/App.tsx
@@ -46,6 +46,7 @@ import ContactMessagesPage from './pages/ContactMessagesPage'
 import ProductAttributesPage from './pages/ProductAttributesPage'
 import TiktokPriceSimulatorPage from './pages/TiktokPriceSimulatorPage'
 import TiktokShopCasePage from './pages/TiktokShopCasePage'
+import ShopeeShopCasePage from './pages/ShopeeShopCasePage'
 
 function App() {
   return (
@@ -92,6 +93,7 @@ function App() {
             <Route path="/tiktok-analysis" element={<TiktokAnalysisPage />} />
             <Route path="/tiktok-price-simulator" element={<TiktokPriceSimulatorPage />} />
             <Route path="/tiktok-shop-case" element={<TiktokShopCasePage />} />
+            <Route path="/shopee-shop-case" element={<ShopeeShopCasePage />} />
             <Route path="/shopee" element={<ShopeePage />} />
             <Route path="/shopee/:orderId" element={<ShopeeOrderDetailPage />} />
             <Route path="/shopee-analytics" element={<ShopeeAnalyticsPage />} />
diff --git a/apps/admin/src/components/AdminLayout.tsx b/apps/admin/src/components/AdminLayout.tsx
index c4301a4..036eef3 100644
--- a/apps/admin/src/components/AdminLayout.tsx
+++ b/apps/admin/src/components/AdminLayout.tsx
@@ -1,11 +1,14 @@
+import { useState } from 'react'
 import { Outlet } from 'react-router-dom'
 import Sidebar from './Sidebar'
 
 export default function AdminLayout() {
+  const [isCollapsed, setIsCollapsed] = useState(false)
+
   return (
     <div className="flex min-h-screen bg-night-950">
-      <Sidebar />
-      <main className="flex-1 ml-72 p-10">
+      <Sidebar isCollapsed={isCollapsed} onToggle={() => setIsCollapsed(!isCollapsed)} />
+      <main className={`flex-1 p-10 transition-all duration-300 ${isCollapsed ? 'ml-20' : 'ml-72'}`}>
         <div className="w-full max-w-[1600px] mx-auto space-y-10">
           <Outlet />
         </div>
diff --git a/apps/admin/src/components/Sidebar.tsx b/apps/admin/src/components/Sidebar.tsx
index 8068b85..7d60d14 100644
--- a/apps/admin/src/components/Sidebar.tsx
+++ b/apps/admin/src/components/Sidebar.tsx
@@ -29,36 +29,62 @@ import {
   Sparkles,
   Calculator,
   Info,
+  ChevronLeft,
 } from 'lucide-react'
 
 const MAIN_MENU = [
   { icon: LayoutDashboard, label: 'Dashboard', to: '/' },
+]
+
+const PRODUCT_MENU = [
   { icon: Tags, label: 'Categories', to: '/categories' },
   { icon: Package, label: 'Products', to: '/products' },
   { icon: Ruler, label: 'Product Attributes', to: '/product-attributes' },
   { icon: PackageOpen, label: 'Raw Materials', to: '/raw-materials' },
-  { icon: Users, label: 'LINE Customers', to: '/customers' },
+]
+
+const SALES_MENU = [
   { icon: ShoppingCart, label: 'Orders', to: '/orders' },
   { icon: Ticket, label: 'Promotions', to: '/promotions' },
   { icon: Ticket, label: 'Coupons', to: '/coupons' },
-  { icon: Layers, label: 'Page Builder (CMS)', to: '/page-builder' },
-  { icon: Sparkles, label: 'CMS Block Showcase', to: '/cms-mockup' },
-  { icon: ImageIcon, label: 'Media Library', to: '/media' },
-  { icon: BookOpen, label: 'Scent Guide', to: '/articles' },
-  { icon: TrendingUp, label: 'TikTok Data', to: '/tiktok' },
-  { icon: TrendingUp, label: 'TikTok Analysis', to: '/tiktok-analysis' },
-  { icon: ShoppingBag, label: 'Shopee (Hom Aroma)', to: '/shopee' },
-  { icon: BarChart3, label: 'Shopee Analytics', to: '/shopee-analytics' },
-  { icon: Layers, label: 'Shopee ทุกร้าน', to: '/shopee-overview' },
+  { icon: Globe2, label: 'All Analytics', to: '/global-analytics' },
+]
+
+const TIKTOK_MENU = [
   { icon: ShoppingCart, label: 'TikTok Orders', to: '/tiktok-order' },
   { icon: BarChart3, label: 'TikTok Analytics', to: '/tiktok-analytics' },
   { icon: Layers, label: 'TikTok ทุกร้าน', to: '/tiktok-overview' },
   { icon: Calculator, label: 'TikTok Price Simulator', to: '/tiktok-price-simulator' },
   { icon: Info, label: 'TikTok Shop Case', to: '/tiktok-shop-case' },
+]
+
+const TIKTOK_LEGACY_MENU = [
+  { icon: TrendingUp, label: 'TikTok Report Import', to: '/tiktok' },
+  { icon: TrendingUp, label: 'Product SKU Analysis', to: '/tiktok-analysis' },
+]
+
+const SHOPEE_MENU = [
+  { icon: ShoppingBag, label: 'Shopee (Hom Aroma)', to: '/shopee' },
+  { icon: BarChart3, label: 'Shopee Analytics', to: '/shopee-analytics' },
+  { icon: Layers, label: 'Shopee ทุกร้าน', to: '/shopee-overview' },
+  { icon: Info, label: 'Shopee Shop Case', to: '/shopee-shop-case' },
+]
+
+const LAZADA_MENU = [
   { icon: ShoppingCart, label: 'Lazada Orders', to: '/lazada-order' },
   { icon: BarChart3, label: 'Lazada Analytics', to: '/lazada-analytics' },
   { icon: Layers, label: 'Lazada ทุกร้าน', to: '/lazada-overview' },
-  { icon: Globe2, label: 'All Analytics', to: '/global-analytics' },
+]
+
+const CMS_MENU = [
+  { icon: Layers, label: 'Page Builder (CMS)', to: '/page-builder' },
+  { icon: Sparkles, label: 'CMS Block Showcase', to: '/cms-mockup' },
+  { icon: ImageIcon, label: 'Media Library', to: '/media' },
+  { icon: BookOpen, label: 'Scent Guide', to: '/articles' },
+]
+
+const CUSTOMER_MENU = [
+  { icon: Users, label: 'LINE Customers', to: '/customers' },
   { icon: Users, label: 'Subscribers', to: '/subscribers' },
   { icon: MessageSquare, label: 'Contact Messages', to: '/contacts' },
 ]
@@ -78,11 +104,33 @@ const SETTINGS_MENU = [
   { icon: Wrench,     label: 'System',            to: '/settings/system' },
 ]
 
-export default function Sidebar() {
+interface SidebarProps {
+  isCollapsed: boolean
+  onToggle: () => void
+}
+
+export default function Sidebar({ isCollapsed, onToggle }: SidebarProps) {
   const navigate = useNavigate()
   const location = useLocation()
+  const isInProduct = ['/categories', '/products', '/product-attributes', '/raw-materials'].some(p => location.pathname.startsWith(p))
+  const isInSales = ['/orders', '/promotions', '/coupons', '/global-analytics'].some(p => location.pathname.startsWith(p))
+  const isInTiktokLegacy = location.pathname === '/tiktok' || location.pathname.startsWith('/tiktok-analysis')
+  const isInTiktok = location.pathname.startsWith('/tiktok') && !isInTiktokLegacy
+  const isInShopee = location.pathname.startsWith('/shopee')
+  const isInLazada = location.pathname.startsWith('/lazada')
+  const isInCms = ['/page-builder', '/cms-mockup', '/media', '/articles'].some(p => location.pathname.startsWith(p))
+  const isInCustomer = ['/customers', '/subscribers', '/contacts'].some(p => location.pathname.startsWith(p))
   const isInMenuManager = location.pathname.startsWith('/menu-manager')
   const isInSettings = location.pathname.startsWith('/settings')
+
+  const [productOpen, setProductOpen] = useState(isInProduct)
+  const [salesOpen, setSalesOpen] = useState(isInSales)
+  const [tiktokOpen, setTiktokOpen] = useState(isInTiktok)
+  const [tiktokLegacyOpen, setTiktokLegacyOpen] = useState(isInTiktokLegacy)
+  const [shopeeOpen, setShopeeOpen] = useState(isInShopee)
+  const [lazadaOpen, setLazadaOpen] = useState(isInLazada)
+  const [cmsOpen, setCmsOpen] = useState(isInCms)
+  const [customerOpen, setCustomerOpen] = useState(isInCustomer)
   const [menuManagerOpen, setMenuManagerOpen] = useState(isInMenuManager)
   const [settingsOpen, setSettingsOpen] = useState(isInSettings)
 
@@ -92,13 +140,31 @@ export default function Sidebar() {
     navigate('/login')
   }
 
+  const handleGroupClick = (setOpen: React.Dispatch<React.SetStateAction<boolean>>) => {
+    if (isCollapsed) {
+      onToggle()
+      setOpen(true)
+    } else {
+      setOpen(v => !v)
+    }
+  }
+
   return (
-    <aside className="w-72 h-screen fixed left-0 top-0 bg-night-900 border-r border-white/5 flex flex-col z-50">
-      {/* Brand */}
-      <div className="p-8">
-        <div className="text-xl font-bold tracking-widest text-white uppercase italic">
-          HomAroma <span className="text-cyan-glow text-xs not-italic font-light opacity-60">Admin</span>
-        </div>
+    <aside className={`h-screen fixed left-0 top-0 bg-night-900 border-r border-white/5 flex flex-col z-50 transition-all duration-300 ${isCollapsed ? 'w-20' : 'w-72'}`}>
+      {/* Brand & Toggle Header */}
+      <div className={`p-6 flex items-center ${isCollapsed ? 'justify-center' : 'justify-between'} border-b border-white/5`}>
+        {!isCollapsed && (
+          <div className="text-xl font-bold tracking-widest text-white uppercase italic truncate">
+            HomAroma <span className="text-cyan-glow text-xs not-italic font-light opacity-60">Admin</span>
+          </div>
+        )}
+        <button 
+          onClick={onToggle}
+          title={isCollapsed ? 'ขยายเมนู' : 'ย่อเมนู'}
+          className="p-1.5 rounded-lg bg-white/5 border border-white/10 text-slate-400 hover:text-white transition-colors cursor-pointer"
+        >
+          {isCollapsed ? <ChevronRight className="w-4 h-4" /> : <ChevronLeft className="w-4 h-4" />}
+        </button>
       </div>
 
       {/* Navigation — scrollable */}
@@ -108,28 +174,270 @@ export default function Sidebar() {
             key={item.to}
             to={item.to}
             end={item.to === '/'}
+            title={isCollapsed ? item.label : undefined}
             className={({ isActive }) =>
-              `sidebar-link ${isActive ? 'sidebar-link-active' : 'sidebar-link-inactive'}`
+              `sidebar-link ${isActive ? 'sidebar-link-active' : 'sidebar-link-inactive'} ${isCollapsed ? 'justify-center px-0' : ''}`
             }
           >
             <item.icon className="w-5 h-5 shrink-0" />
-            <span className="flex-1">{item.label}</span>
-            <ChevronRight className="w-4 h-4 opacity-0 group-hover:opacity-40 transition-opacity" />
+            {!isCollapsed && <span className="flex-1">{item.label}</span>}
+            {!isCollapsed && <ChevronRight className="w-4 h-4 opacity-0 group-hover:opacity-40 transition-opacity" />}
           </NavLink>
         ))}
 
+        {/* Catalog Group */}
+        <div className="pt-1">
+          <button
+            onClick={() => handleGroupClick(setProductOpen)}
+            title={isCollapsed ? 'Catalog' : undefined}
+            className={`sidebar-link sidebar-link-inactive w-full ${isInProduct ? 'text-white' : ''} ${isCollapsed ? 'justify-center px-0' : ''}`}
+          >
+            <Package className="w-5 h-5 shrink-0" />
+            {!isCollapsed && <span className="flex-1 text-left">Catalog</span>}
+            {!isCollapsed && <ChevronDown className={`w-4 h-4 transition-transform duration-200 ${productOpen ? 'rotate-180' : ''}`} />}
+          </button>
+
+          {!isCollapsed && productOpen && (
+            <div className="mt-1 ml-4 pl-4 border-l border-white/10 space-y-1">
+              {PRODUCT_MENU.map((item) => (
+                <NavLink
+                  key={item.to}
+                  to={item.to}
+                  className={({ isActive }) =>
+                    `sidebar-link text-sm ${isActive ? 'sidebar-link-active' : 'sidebar-link-inactive'}`
+                  }
+                >
+                  <item.icon className="w-4 h-4 shrink-0" />
+                  <span className="flex-1">{item.label}</span>
+                </NavLink>
+              ))}
+            </div>
+          )}
+        </div>
+
+        {/* Sales & Marketing Group */}
+        <div className="pt-1">
+          <button
+            onClick={() => handleGroupClick(setSalesOpen)}
+            title={isCollapsed ? 'Sales & Marketing' : undefined}
+            className={`sidebar-link sidebar-link-inactive w-full ${isInSales ? 'text-white' : ''} ${isCollapsed ? 'justify-center px-0' : ''}`}
+          >
+            <ShoppingCart className="w-5 h-5 shrink-0" />
+            {!isCollapsed && <span className="flex-1 text-left">Sales & Marketing</span>}
+            {!isCollapsed && <ChevronDown className={`w-4 h-4 transition-transform duration-200 ${salesOpen ? 'rotate-180' : ''}`} />}
+          </button>
+
+          {!isCollapsed && salesOpen && (
+            <div className="mt-1 ml-4 pl-4 border-l border-white/10 space-y-1">
+              {SALES_MENU.map((item) => (
+                <NavLink
+                  key={item.to}
+                  to={item.to}
+                  className={({ isActive }) =>
+                    `sidebar-link text-sm ${isActive ? 'sidebar-link-active' : 'sidebar-link-inactive'}`
+                  }
+                >
+                  <item.icon className="w-4 h-4 shrink-0" />
+                  <span className="flex-1">{item.label}</span>
+                </NavLink>
+              ))}
+            </div>
+          )}
+        </div>
+
+        {/* TikTok Group */}
+        <div className="pt-1">
+          <button
+            onClick={() => handleGroupClick(setTiktokOpen)}
+            title={isCollapsed ? 'TikTok' : undefined}
+            className={`sidebar-link sidebar-link-inactive w-full ${isInTiktok ? 'text-white' : ''} ${isCollapsed ? 'justify-center px-0' : ''}`}
+          >
+            <TrendingUp className="w-5 h-5 shrink-0" />
+            {!isCollapsed && <span className="flex-1 text-left">TikTok</span>}
+            {!isCollapsed && <ChevronDown className={`w-4 h-4 transition-transform duration-200 ${tiktokOpen ? 'rotate-180' : ''}`} />}
+          </button>
+
+          {!isCollapsed && tiktokOpen && (
+            <div className="mt-1 ml-4 pl-4 border-l border-white/10 space-y-1">
+              {TIKTOK_MENU.map((item) => (
+                <NavLink
+                  key={item.to}
+                  to={item.to}
+                  className={({ isActive }) =>
+                    `sidebar-link text-sm ${isActive ? 'sidebar-link-active' : 'sidebar-link-inactive'}`
+                  }
+                >
+                  <item.icon className="w-4 h-4 shrink-0" />
+                  <span className="flex-1">{item.label}</span>
+                </NavLink>
+              ))}
+            </div>
+          )}
+        </div>
+
+        {/* TikTok Legacy Group */}
+        <div className="pt-1">
+          <button
+            onClick={() => handleGroupClick(setTiktokLegacyOpen)}
+            title={isCollapsed ? 'TikTok Legacy' : undefined}
+            className={`sidebar-link sidebar-link-inactive w-full ${isInTiktokLegacy ? 'text-white' : ''} ${isCollapsed ? 'justify-center px-0' : ''}`}
+          >
+            <TrendingUp className="w-5 h-5 shrink-0" />
+            {!isCollapsed && <span className="flex-1 text-left">TikTok Legacy</span>}
+            {!isCollapsed && <ChevronDown className={`w-4 h-4 transition-transform duration-200 ${tiktokLegacyOpen ? 'rotate-180' : ''}`} />}
+          </button>
+
+          {!isCollapsed && tiktokLegacyOpen && (
+            <div className="mt-1 ml-4 pl-4 border-l border-white/10 space-y-1">
+              {TIKTOK_LEGACY_MENU.map((item) => (
+                <NavLink
+                  key={item.to}
+                  to={item.to}
+                  className={({ isActive }) =>
+                    `sidebar-link text-sm ${isActive ? 'sidebar-link-active' : 'sidebar-link-inactive'}`
+                  }
+                >
+                  <item.icon className="w-4 h-4 shrink-0" />
+                  <span className="flex-1">{item.label}</span>
+                </NavLink>
+              ))}
+            </div>
+          )}
+        </div>
+
+        {/* Shopee Group */}
+        <div className="pt-1">
+          <button
+            onClick={() => handleGroupClick(setShopeeOpen)}
+            title={isCollapsed ? 'Shopee' : undefined}
+            className={`sidebar-link sidebar-link-inactive w-full ${isInShopee ? 'text-white' : ''} ${isCollapsed ? 'justify-center px-0' : ''}`}
+          >
+            <ShoppingBag className="w-5 h-5 shrink-0" />
+            {!isCollapsed && <span className="flex-1 text-left">Shopee</span>}
+            {!isCollapsed && <ChevronDown className={`w-4 h-4 transition-transform duration-200 ${shopeeOpen ? 'rotate-180' : ''}`} />}
+          </button>
+
+          {!isCollapsed && shopeeOpen && (
+            <div className="mt-1 ml-4 pl-4 border-l border-white/10 space-y-1">
+              {SHOPEE_MENU.map((item) => (
+                <NavLink
+                  key={item.to}
+                  to={item.to}
+                  className={({ isActive }) =>
+                    `sidebar-link text-sm ${isActive ? 'sidebar-link-active' : 'sidebar-link-inactive'}`
+                  }
+                >
+                  <item.icon className="w-4 h-4 shrink-0" />
+                  <span className="flex-1">{item.label}</span>
+                </NavLink>
+              ))}
+            </div>
+          )}
+        </div>
+
+        {/* Lazada Group */}
+        <div className="pt-1">
+          <button
+            onClick={() => handleGroupClick(setLazadaOpen)}
+            title={isCollapsed ? 'Lazada' : undefined}
+            className={`sidebar-link sidebar-link-inactive w-full ${isInLazada ? 'text-white' : ''} ${isCollapsed ? 'justify-center px-0' : ''}`}
+          >
+            <ShoppingCart className="w-5 h-5 shrink-0" />
+            {!isCollapsed && <span className="flex-1 text-left">Lazada</span>}
+            {!isCollapsed && <ChevronDown className={`w-4 h-4 transition-transform duration-200 ${lazadaOpen ? 'rotate-180' : ''}`} />}
+          </button>
+
+          {!isCollapsed && lazadaOpen && (
+            <div className="mt-1 ml-4 pl-4 border-l border-white/10 space-y-1">
+              {LAZADA_MENU.map((item) => (
+                <NavLink
+                  key={item.to}
+                  to={item.to}
+                  className={({ isActive }) =>
+                    `sidebar-link text-sm ${isActive ? 'sidebar-link-active' : 'sidebar-link-inactive'}`
+                  }
+                >
+                  <item.icon className="w-4 h-4 shrink-0" />
+                  <span className="flex-1">{item.label}</span>
+                </NavLink>
+              ))}
+            </div>
+          )}
+        </div>
+
+        {/* Content (CMS) Group */}
+        <div className="pt-1">
+          <button
+            onClick={() => handleGroupClick(setCmsOpen)}
+            title={isCollapsed ? 'Content (CMS)' : undefined}
+            className={`sidebar-link sidebar-link-inactive w-full ${isInCms ? 'text-white' : ''} ${isCollapsed ? 'justify-center px-0' : ''}`}
+          >
+            <Layers className="w-5 h-5 shrink-0" />
+            {!isCollapsed && <span className="flex-1 text-left">Content (CMS)</span>}
+            {!isCollapsed && <ChevronDown className={`w-4 h-4 transition-transform duration-200 ${cmsOpen ? 'rotate-180' : ''}`} />}
+          </button>
+
+          {!isCollapsed && cmsOpen && (
+            <div className="mt-1 ml-4 pl-4 border-l border-white/10 space-y-1">
+              {CMS_MENU.map((item) => (
+                <NavLink
+                  key={item.to}
+                  to={item.to}
+                  className={({ isActive }) =>
+                    `sidebar-link text-sm ${isActive ? 'sidebar-link-active' : 'sidebar-link-inactive'}`
+                  }
+                >
+                  <item.icon className="w-4 h-4 shrink-0" />
+                  <span className="flex-1">{item.label}</span>
+                </NavLink>
+              ))}
+            </div>
+          )}
+        </div>
+
+        {/* Customers & Messages Group */}
+        <div className="pt-1">
+          <button
+            onClick={() => handleGroupClick(setCustomerOpen)}
+            title={isCollapsed ? 'Customers & Messages' : undefined}
+            className={`sidebar-link sidebar-link-inactive w-full ${isInCustomer ? 'text-white' : ''} ${isCollapsed ? 'justify-center px-0' : ''}`}
+          >
+            <Users className="w-5 h-5 shrink-0" />
+            {!isCollapsed && <span className="flex-1 text-left">Customers & Messages</span>}
+            {!isCollapsed && <ChevronDown className={`w-4 h-4 transition-transform duration-200 ${customerOpen ? 'rotate-180' : ''}`} />}
+          </button>
+
+          {!isCollapsed && customerOpen && (
+            <div className="mt-1 ml-4 pl-4 border-l border-white/10 space-y-1">
+              {CUSTOMER_MENU.map((item) => (
+                <NavLink
+                  key={item.to}
+                  to={item.to}
+                  className={({ isActive }) =>
+                    `sidebar-link text-sm ${isActive ? 'sidebar-link-active' : 'sidebar-link-inactive'}`
+                  }
+                >
+                  <item.icon className="w-4 h-4 shrink-0" />
+                  <span className="flex-1">{item.label}</span>
+                </NavLink>
+              ))}
+            </div>
+          )}
+        </div>
+
         {/* Menu Manager Group */}
         <div className="pt-1">
           <button
-            onClick={() => setMenuManagerOpen(v => !v)}
-            className={`sidebar-link sidebar-link-inactive w-full ${isInMenuManager ? 'text-white' : ''}`}
+            onClick={() => handleGroupClick(setMenuManagerOpen)}
+            title={isCollapsed ? 'Menu Manager' : undefined}
+            className={`sidebar-link sidebar-link-inactive w-full ${isInMenuManager ? 'text-white' : ''} ${isCollapsed ? 'justify-center px-0' : ''}`}
           >
             <Layers className="w-5 h-5 shrink-0" />
-            <span className="flex-1 text-left">Menu Manager</span>
-            <ChevronDown className={`w-4 h-4 transition-transform duration-200 ${menuManagerOpen ? 'rotate-180' : ''}`} />
+            {!isCollapsed && <span className="flex-1 text-left">Menu Manager</span>}
+            {!isCollapsed && <ChevronDown className={`w-4 h-4 transition-transform duration-200 ${menuManagerOpen ? 'rotate-180' : ''}`} />}
           </button>
 
-          {menuManagerOpen && (
+          {!isCollapsed && menuManagerOpen && (
             <div className="mt-1 ml-4 pl-4 border-l border-white/10 space-y-1">
               {MENU_MANAGER_MENU.map((item) => (
                 <NavLink
@@ -150,15 +458,16 @@ export default function Sidebar() {
         {/* Settings Group */}
         <div className="pt-1">
           <button
-            onClick={() => setSettingsOpen(v => !v)}
-            className={`sidebar-link sidebar-link-inactive w-full ${isInSettings ? 'text-white' : ''}`}
+            onClick={() => handleGroupClick(setSettingsOpen)}
+            title={isCollapsed ? 'Settings' : undefined}
+            className={`sidebar-link sidebar-link-inactive w-full ${isInSettings ? 'text-white' : ''} ${isCollapsed ? 'justify-center px-0' : ''}`}
           >
             <Settings className="w-5 h-5 shrink-0" />
-            <span className="flex-1 text-left">Settings</span>
-            <ChevronDown className={`w-4 h-4 transition-transform duration-200 ${settingsOpen ? 'rotate-180' : ''}`} />
+            {!isCollapsed && <span className="flex-1 text-left">Settings</span>}
+            {!isCollapsed && <ChevronDown className={`w-4 h-4 transition-transform duration-200 ${settingsOpen ? 'rotate-180' : ''}`} />}
           </button>
 
-          {settingsOpen && (
+          {!isCollapsed && settingsOpen && (
             <div className="mt-1 ml-4 pl-4 border-l border-white/10 space-y-1">
               {SETTINGS_MENU.map((item) => (
                 <NavLink
@@ -179,23 +488,26 @@ export default function Sidebar() {
       </nav>
 
       {/* User / Bottom */}
-      <div className="p-4 border-t border-white/5 space-y-2">
-        <div className="flex items-center gap-3 px-4 py-3 rounded-xl hover:bg-white/5 transition-all group">
-          <div className="w-9 h-9 rounded-full bg-cyan-glow/20 flex items-center justify-center text-cyan-glow font-bold text-xs border border-cyan-glow/30">
+      <div className={`p-4 border-t border-white/5 space-y-2 ${isCollapsed ? 'items-center justify-center' : ''}`}>
+        <div className={`flex items-center gap-3 px-4 py-3 rounded-xl hover:bg-white/5 transition-all group ${isCollapsed ? 'justify-center px-0' : ''}`} title={isCollapsed ? 'Admin Account' : undefined}>
+          <div className="w-9 h-9 rounded-full bg-cyan-glow/20 flex items-center justify-center text-cyan-glow font-bold text-xs border border-cyan-glow/30 shrink-0">
             A
           </div>
-          <div className="flex-1 overflow-hidden">
-            <p className="text-sm font-bold text-white truncate">Admin Account</p>
-            <p className="text-[10px] uppercase tracking-wider text-slate-500">System Manager</p>
-          </div>
+          {!isCollapsed && (
+            <div className="flex-1 overflow-hidden">
+              <p className="text-sm font-bold text-white truncate">Admin Account</p>
+              <p className="text-[10px] uppercase tracking-wider text-slate-500">System Manager</p>
+            </div>
+          )}
         </div>
         
         <button 
           onClick={handleLogout}
-          className="w-full flex items-center gap-3 px-4 py-3 rounded-xl text-sm font-medium text-rose-500 hover:bg-rose-500/10 transition-all cursor-pointer"
+          title={isCollapsed ? 'Logout' : undefined}
+          className={`w-full flex items-center gap-3 px-4 py-3 rounded-xl text-sm font-medium text-rose-500 hover:bg-rose-500/10 transition-all cursor-pointer ${isCollapsed ? 'justify-center px-0' : ''}`}
         >
-          <LogOut className="w-5 h-5" />
-          Logout
+          <LogOut className="w-5 h-5 shrink-0" />
+          {!isCollapsed && <span>Logout</span>}
         </button>
       </div>
     </aside>
diff --git a/apps/admin/src/pages/ShopeeShopCasePage.tsx b/apps/admin/src/pages/ShopeeShopCasePage.tsx
new file mode 100644
index 0000000..9837e6c
--- /dev/null
+++ b/apps/admin/src/pages/ShopeeShopCasePage.tsx
@@ -0,0 +1,577 @@
+import { useState, useEffect } from 'react'
+import { 
+  Calculator, 
+  Info, 
+  RefreshCw 
+} from 'lucide-react'
+
+function fmt(val: number) {
+  return '฿' + val.toLocaleString('th-TH', { minimumFractionDigits: 2, maximumFractionDigits: 2 })
+}
+
+export default function ShopeeShopCasePage() {
+  const [resetKey, setResetKey] = useState(0)
+  const [selectedCase, setSelectedCase] = useState<'case1' | 'case2' | 'case3'>('case1')
+  
+  const [simBeforeDiscount, setSimBeforeDiscount] = useState(79.00)
+  const [discounts, setDiscounts] = useState<Array<{ type: 'pct' | 'amount'; value: number }>>([
+    { type: 'amount', value: 0 },
+    { type: 'amount', value: 0 },
+    { type: 'amount', value: 0 },
+  ])
+  const [simCost, setSimCost] = useState(30.00)
+  
+  const [simCommPct, setSimCommPct] = useState(16.46)
+  const [simServicePct, setSimServicePct] = useState(8.86)
+  const [simTransPct, setSimTransPct] = useState(3.80)
+  const [simAmsPct, setSimAmsPct] = useState(0)
+
+  const caseData = {
+    case1: {
+      beforeDiscount: 79.00,
+      shopDiscount: 0,
+      baseAmt: 79.00,
+      origComm: -13.00,
+      origService: -7.00,
+      origTrans: -3.00,
+      origAms: 0,
+      origTotalFees: -23.00,
+      originalPayout: 56.00,
+      defaultCost: 30.00,
+      label: 'เคสที่ 1: บิลสินค้า ฿79 (สุทธิ ฿56.00)',
+    },
+    case2: {
+      beforeDiscount: 79.00,
+      shopDiscount: 0,
+      baseAmt: 79.00,
+      origComm: -13.00,
+      origService: -7.00,
+      origTrans: -3.00,
+      origAms: -1.00,
+      origTotalFees: -24.00,
+      originalPayout: 55.00,
+      defaultCost: 30.00,
+      label: 'เคสที่ 2: บิลสินค้า ฿79 + AMS (สุทธิ ฿55.00)',
+    },
+    case3: {
+      beforeDiscount: 190.00,
+      shopDiscount: 0,
+      baseAmt: 190.00,
+      origComm: -24.00,
+      origService: -16.00,
+      origTrans: -7.00,
+      origAms: -13.00,
+      origTotalFees: -60.00,
+      originalPayout: 130.00,
+      defaultCost: 80.00,
+      label: 'เคสที่ 3: บิลสินค้า ฿190 + AMS (สุทธิ ฿130.00)',
+    }
+  }
+
+  const activeCase = caseData[selectedCase]
+
+  useEffect(() => {
+    setSimBeforeDiscount(activeCase.beforeDiscount)
+    setDiscounts([
+      { type: 'amount', value: Math.abs(activeCase.shopDiscount) },
+      { type: 'amount', value: 0 },
+      { type: 'amount', value: 0 },
+    ])
+    setSimCost(activeCase.defaultCost)
+    if (selectedCase === 'case1') {
+      setSimCommPct(16.46)
+      setSimServicePct(8.86)
+      setSimTransPct(3.80)
+      setSimAmsPct(0)
+    } else if (selectedCase === 'case2') {
+      setSimCommPct(16.46)
+      setSimServicePct(8.86)
+      setSimTransPct(3.80)
+      setSimAmsPct(1.27)
+    } else {
+      setSimCommPct(12.63)
+      setSimServicePct(8.42)
+      setSimTransPct(3.68)
+      setSimAmsPct(6.84)
+    }
+  }, [selectedCase])
+
+  // Simulated calculations
+  const simDiscountAmount = discounts.reduce((sum, d) => {
+    const amt = d.type === 'pct' ? simBeforeDiscount * (d.value / 100) : d.value
+    return sum + amt
+  }, 0)
+  const baseAmt = Math.max(0, simBeforeDiscount - simDiscountAmount)
+  
+  const simCommAmt = baseAmt * (simCommPct / 100)
+  const simServiceAmt = baseAmt * (simServicePct / 100)
+  const simTransAmt = baseAmt * (simTransPct / 100)
+  const simAmsAmt = baseAmt * (simAmsPct / 100)
+  const simTotalAmt = simCommAmt + simServiceAmt + simTransAmt + simAmsAmt
+  const simTotalPct = simCommPct + simServicePct + simTransPct + simAmsPct
+  const simPayout = baseAmt - simTotalAmt
+
+  const originalPayout = activeCase.originalPayout
+  const diffVal = simPayout - originalPayout
+  const diffPct = originalPayout > 0 ? (diffVal / originalPayout) * 100 : 0
+
+  // Profit/Margin/ROI Calculations
+  const origProfit = originalPayout - simCost
+  const origProfitMargin = activeCase.baseAmt > 0 ? (origProfit / activeCase.baseAmt) * 100 : 0
+  const origROI = simCost > 0 ? (origProfit / simCost) * 100 : 0
+
+  const simProfit = simPayout - simCost
+  const simProfitMargin = baseAmt > 0 ? (simProfit / baseAmt) * 100 : 0
+  const simROI = simCost > 0 ? (simProfit / simCost) * 100 : 0
+
+  return (
+    <div className="min-h-screen p-6 md:p-8 max-w-5xl mx-auto animate-fade-in" key={resetKey}>
+      {/* Page header */}
+      <div className="flex items-start justify-between mb-8 gap-4">
+        <div>
+          <div className="flex items-center gap-3 mb-2">
+            <div className="w-10 h-10 rounded-xl bg-orange-500/10 border border-orange-500/20 flex items-center justify-center">
+              <Calculator className="w-5 h-5 text-orange-500" />
+            </div>
+            <h1 className="text-2xl font-bold text-white tracking-tight">Shopee Shop Case</h1>
+          </div>
+          <p className="text-sm text-slate-500 max-w-2xl">
+            ศึกษาโครงสร้างบิลรับเงินจริงจากระบบ Shopee พร้อมทั้งจำลองคำนวณราคาขาย, คูปองส่วนลดร้านค้า, ต้นทุน และประเมินสถิติกำไร & ROI ก่อนขายจริง
+          </p>
+        </div>
+        <button
+          onClick={() => {
+            setResetKey(k => k + 1)
+            if (selectedCase === 'case1') {
+              setSimCommPct(16.46)
+              setSimServicePct(8.86)
+              setSimTransPct(3.80)
+              setSimAmsPct(0)
+            } else if (selectedCase === 'case2') {
+              setSimCommPct(16.46)
+              setSimServicePct(8.86)
+              setSimTransPct(3.80)
+              setSimAmsPct(1.27)
+            } else {
+              setSimCommPct(12.63)
+              setSimServicePct(8.42)
+              setSimTransPct(3.68)
+              setSimAmsPct(6.84)
+            }
+          }}
+          className="btn-ghost flex items-center gap-2 text-xs shrink-0"
+          title="รีเซ็ตทุกค่า"
+        >
+          <RefreshCw className="w-4 h-4" />
+          Reset
+        </button>
+      </div>
+
+      {/* Real Payout Case Study Example */}
+      <div className="admin-card border-white/10 animate-fade-in">
+        <div className="flex items-center justify-between mb-4 flex-wrap gap-4 border-b border-white/5 pb-4">
+          <div className="flex items-center gap-3">
+            <Info className="w-5 h-5 text-orange-500" />
+            <h2 className="text-lg font-bold text-white">กรณีศึกษา & เครื่องมือจำลองค่าธรรมเนียมจริง (Shopee)</h2>
+          </div>
+          <div className="flex items-center gap-2">
+            <div className="flex p-1 bg-night-900 border border-white/10 rounded-lg">
+              <button
+                type="button"
+                className={`px-3 py-1.5 text-xs font-medium rounded-md transition-all ${selectedCase === 'case1' ? 'bg-orange-500/20 text-orange-500' : 'text-slate-400 hover:text-white'}`}
+                onClick={() => setSelectedCase('case1')}
+              >
+                ตัวอย่างที่ 1 (ยอด ฿79)
+              </button>
+              <button
+                type="button"
+                className={`px-3 py-1.5 text-xs font-medium rounded-md transition-all ${selectedCase === 'case2' ? 'bg-orange-500/20 text-orange-500' : 'text-slate-400 hover:text-white'}`}
+                onClick={() => setSelectedCase('case2')}
+              >
+                ตัวอย่างที่ 2 (ยอด ฿79 + AMS)
+              </button>
+              <button
+                type="button"
+                className={`px-3 py-1.5 text-xs font-medium rounded-md transition-all ${selectedCase === 'case3' ? 'bg-orange-500/20 text-orange-500' : 'text-slate-400 hover:text-white'}`}
+                onClick={() => setSelectedCase('case3')}
+              >
+                ตัวอย่างที่ 3 (ยอด ฿190 + AMS)
+              </button>
+            </div>
+            <button
+              onClick={() => {
+                if (selectedCase === 'case1') {
+                  setSimCommPct(16.46)
+                  setSimServicePct(8.86)
+                  setSimTransPct(3.80)
+                  setSimAmsPct(0)
+                } else if (selectedCase === 'case2') {
+                  setSimCommPct(16.46)
+                  setSimServicePct(8.86)
+                  setSimTransPct(3.80)
+                  setSimAmsPct(1.27)
+                } else {
+                  setSimCommPct(12.63)
+                  setSimServicePct(8.42)
+                  setSimTransPct(3.68)
+                  setSimAmsPct(6.84)
+                }
+              }}
+              className="btn-ghost text-xs py-1.5 px-3 rounded border border-white/10"
+            >
+              ใช้ค่าตั้งต้นตัวอย่าง
+            </button>
+          </div>
+        </div>
+
+        <p className="text-xs text-slate-400 mb-2 font-medium">
+          รายละเอียดบิลจริงดั้งเดิมของ {selectedCase === 'case1' ? 'ตัวอย่างที่ 1' : 'ตัวอย่างที่ 2'}:
+        </p>
+        <div className="grid grid-cols-3 gap-4 p-3 rounded-lg bg-night-800/40 border border-white/5 text-xs mb-6 opacity-80">
+          <div>
+            <span className="text-slate-500 block">ยอดรวมสินค้าก่อนลด</span>
+            <span className="font-bold text-white font-mono">{fmt(activeCase.beforeDiscount)}</span>
+          </div>
+          <div>
+            <span className="text-slate-500 block">ส่วนลดจากร้านค้า</span>
+            <span className="font-bold text-rose-400 font-mono">
+              {fmt(activeCase.shopDiscount)} (0.0%)
+            </span>
+          </div>
+          <div>
+            <span className="text-slate-500 block">ยอดรวมหลังหักส่วนลด (ฐานคิดค่าคอม)</span>
+            <span className="font-bold text-orange-500 font-mono">{fmt(activeCase.baseAmt)}</span>
+          </div>
+        </div>
+
+        {/* Simulator controls - Price & Discounts */}
+        <p className="text-xs text-slate-400 mb-2 font-medium">1. จำลองการตั้งราคา ส่วนลด และต้นทุนสินค้า (ปรับแต่งเองได้):</p>
+        <div className="mb-4 grid grid-cols-1 sm:grid-cols-3 gap-4 p-4 rounded-xl bg-night-800/40 border border-white/5">
+          <div className="space-y-4">
+            <div>
+              <label className="block text-xs text-slate-400 font-medium mb-1.5">ราคาขายก่อนลด (List Price)</label>
+              <div className="flex items-center gap-2">
+                <input
+                  type="number"
+                  step="1"
+                  min="0"
+                  value={simBeforeDiscount}
+                  onChange={e => setSimBeforeDiscount(parseFloat(e.target.value) || 0)}
+                  className="admin-input w-full text-xs"
+                />
+                <span className="text-xs text-slate-500">฿</span>
+              </div>
+            </div>
+            <div>
+              <label className="block text-xs text-slate-400 font-medium mb-1.5">ต้นทุนสินค้า (Cost)</label>
+              <div className="flex items-center gap-2 mb-2">
+                <input
+                  type="number"
+                  step="1"
+                  min="0"
+                  value={simCost}
+                  onChange={e => setSimCost(parseFloat(e.target.value) || 0)}
+                  className="admin-input w-full text-xs"
+                />
+                <span className="text-xs text-slate-500">฿</span>
+              </div>
+              <div className="flex gap-2">
+                {[20, 45, 50].map(val => (
+                  <button
+                    key={val}
+                    type="button"
+                    onClick={() => setSimCost(val)}
+                    className={`px-2.5 py-1 text-[10px] font-medium rounded border transition-all ${simCost === val ? 'bg-orange-500/20 text-orange-500 border-orange-500/30' : 'bg-night-900 text-slate-400 border-white/10 hover:text-white hover:border-white/20'}`}
+                  >
+                    ฿{val}
+                  </button>
+                ))}
+              </div>
+            </div>
+          </div>
+
+          <div className="space-y-3 sm:col-span-2">
+            <label className="block text-xs text-slate-400 font-medium">ส่วนลดจากร้านค้า (คูปองร้านค้า 1-3)</label>
+            <div className="grid grid-cols-1 md:grid-cols-3 gap-3">
+              {discounts.map((discount, index) => (
+                <div key={index} className="flex flex-col gap-2 p-2.5 rounded-lg bg-night-900/60 border border-white/5">
+                  <span className="text-[10px] text-slate-500 font-bold">คูปองที่ #{index + 1}</span>
+                  <div className="flex items-center gap-2">
+                    <div className="flex p-0.5 bg-night-950 border border-white/10 rounded-md shrink-0">
+                      <button
+                        type="button"
+                        className={`px-1.5 py-0.5 text-[9px] font-medium rounded transition-all ${discount.type === 'pct' ? 'bg-orange-500/20 text-orange-500' : 'text-slate-400 hover:text-white'}`}
+                        onClick={() => {
+                          const updated = [...discounts]
+                          updated[index] = { ...updated[index], type: 'pct' }
+                          setDiscounts(updated)
+                        }}
+                      >
+                        %
+                      </button>
+                      <button
+                        type="button"
+                        className={`px-1.5 py-0.5 text-[9px] font-medium rounded transition-all ${discount.type === 'amount' ? 'bg-orange-500/20 text-orange-500' : 'text-slate-400 hover:text-white'}`}
+                        onClick={() => {
+                          const updated = [...discounts]
+                          updated[index] = { ...updated[index], type: 'amount' }
+                          setDiscounts(updated)
+                        }}
+                      >
+                        ฿
+                      </button>
+                    </div>
+                    <input
+                      type="number"
+                      step="0.1"
+                      min="0"
+                      value={discount.value || ''}
+                      onChange={e => {
+                        const updated = [...discounts]
+                        updated[index] = { ...updated[index], value: parseFloat(e.target.value) || 0 }
+                        setDiscounts(updated)
+                      }}
+                      placeholder="0"
+                      className="admin-input w-full text-xs p-1"
+                    />
+                  </div>
+                </div>
+              ))}
+            </div>
+          </div>
+        </div>
+
+        {/* Simulator controls - Fees */}
+        <p className="text-xs text-slate-400 mb-2 font-medium">2. จำลองการปรับเปลี่ยนอัตราค่าธรรมเนียม Shopee (%):</p>
+        <div className="mb-6 grid grid-cols-2 sm:grid-cols-4 gap-4 p-4 rounded-xl bg-night-800/40 border border-white/5">
+          <div>
+            <label className="block text-xs text-slate-400 font-medium mb-1.5">ค่าคอมมิชชั่น (%)</label>
+            <div className="flex items-center gap-2">
+              <input
+                type="number"
+                step="0.01"
+                min="0"
+                max="100"
+                value={simCommPct}
+                onChange={e => setSimCommPct(parseFloat(e.target.value) || 0)}
+                className="admin-input w-full text-xs"
+              />
+              <span className="text-xs text-slate-500">%</span>
+            </div>
+          </div>
+          <div>
+            <label className="block text-xs text-slate-400 font-medium mb-1.5">ค่าบริการ (%)</label>
+            <div className="flex items-center gap-2">
+              <input
+                type="number"
+                step="0.01"
+                min="0"
+                max="100"
+                value={simServicePct}
+                onChange={e => setSimServicePct(parseFloat(e.target.value) || 0)}
+                className="admin-input w-full text-xs"
+              />
+              <span className="text-xs text-slate-500">%</span>
+            </div>
+          </div>
+          <div>
+            <label className="block text-xs text-slate-400 font-medium mb-1.5">ค่าธุรกรรม (%)</label>
+            <div className="flex items-center gap-2">
+              <input
+                type="number"
+                step="0.01"
+                min="0"
+                max="100"
+                value={simTransPct}
+                onChange={e => setSimTransPct(parseFloat(e.target.value) || 0)}
+                className="admin-input w-full text-xs"
+              />
+              <span className="text-xs text-slate-500">%</span>
+            </div>
+          </div>
+          <div>
+            <label className="block text-xs text-slate-400 font-medium mb-1.5">ค่าคอม AMS (%)</label>
+            <div className="flex items-center gap-2">
+              <input
+                type="number"
+                step="0.01"
+                min="0"
+                max="100"
+                value={simAmsPct}
+                onChange={e => setSimAmsPct(parseFloat(e.target.value) || 0)}
+                className="admin-input w-full text-xs"
+              />
+              <span className="text-xs text-slate-500">%</span>
+            </div>
+          </div>
+        </div>
+
+        {/* Side-by-side comparison tables */}
+        <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
+          {/* ก่อนปรับ (ค่าธรรมเนียมจากบิลตัวอย่างจริง) */}
+          <div className="rounded-xl bg-night-800/30 border border-white/5 p-4 space-y-4">
+            <h3 className="text-xs font-bold text-slate-400 uppercase tracking-wider border-b border-white/5 pb-2 flex justify-between">
+              <span>ก่อนปรับ (บิลดั้งเดิม)</span>
+              <span className="text-slate-500">รวม {((Math.abs(activeCase.origTotalFees) / activeCase.baseAmt) * 100).toFixed(2)}%</span>
+            </h3>
+            <div className="space-y-2 text-xs">
+              <div className="flex justify-between text-slate-400">
+                <span>ยอดรวมสินค้าก่อนลด</span>
+                <span className="font-mono">{fmt(activeCase.beforeDiscount)}</span>
+              </div>
+              <div className="flex justify-between text-slate-400">
+                <span>ส่วนลดจากร้านค้า</span>
+                <span className="font-mono text-rose-400">{fmt(activeCase.shopDiscount)}</span>
+              </div>
+              <div className="flex justify-between border-t border-white/5 pt-1.5 font-medium text-slate-300">
+                <span>ยอดสินค้าสุทธิ (ฐานคิดคอม)</span>
+                <span>{fmt(activeCase.baseAmt)}</span>
+              </div>
+              <div className="flex justify-between pl-3 text-slate-500">
+                <span>- ค่าคอมมิชชั่น (Commission Fee)</span>
+                <span className="font-mono text-rose-400">{fmt(activeCase.origComm)}</span>
+              </div>
+              <div className="flex justify-between pl-3 text-slate-500">
+                <span>- ค่าบริการ (Service Fee)</span>
+                <span className="font-mono text-rose-400">{fmt(activeCase.origService)}</span>
+              </div>
+              <div className="flex justify-between pl-3 text-slate-500">
+                <span>- ค่าธุรกรรมการชำระเงิน</span>
+                <span className="font-mono text-rose-400">{fmt(activeCase.origTrans)}</span>
+              </div>
+              {activeCase.origAms !== 0 && (
+                <div className="flex justify-between pl-3 text-slate-500">
+                  <span>- ค่าคอมมิชชั่น AMS</span>
+                  <span className="font-mono text-rose-400">{fmt(activeCase.origAms)}</span>
+                </div>
+              )}
+              <div className="flex justify-between border-t border-white/5 pt-1.5 font-medium text-slate-300">
+                <span>รวมค่าธรรมเนียมโดนหัก</span>
+                <span className="font-mono text-rose-400">{fmt(activeCase.origTotalFees)}</span>
+              </div>
+              <div className="flex justify-between border-t border-white/5 pt-2 font-bold text-white text-sm">
+                <span>ยอดเงินโอนเข้าบัญชีสุทธิ</span>
+                <span className="font-mono text-orange-500">{fmt(activeCase.originalPayout)}</span>
+              </div>
+              <div className="flex justify-between border-t border-white/5 pt-1.5 text-slate-400">
+                <span>- ต้นทุนสินค้า (Cost)</span>
+                <span className="font-mono text-rose-400">฿-{simCost.toFixed(2)}</span>
+              </div>
+              <div className="flex justify-between border-t border-white/5 pt-2 font-bold text-white text-sm">
+                <span>กำไรสุทธิ (Net Profit)</span>
+                <span className={`font-mono ${origProfit >= 0 ? 'text-green-400' : 'text-rose-400'}`}>
+                  {origProfit >= 0 ? '' : '-'}฿{Math.abs(origProfit).toFixed(2)}
+                </span>
+              </div>
+              <div className="flex justify-between text-slate-400 pl-3">
+                <span>กำไรต่อยอดขาย (Margin %)</span>
+                <span className={`font-mono ${origProfit >= 0 ? 'text-green-400' : 'text-rose-400'}`}>
+                  {origProfitMargin.toFixed(1)}%
+                </span>
+              </div>
+              <div className="flex justify-between text-slate-400 pl-3">
+                <span>กำไรต่อทุน (ROI %)</span>
+                <span className={`font-mono ${origProfit >= 0 ? 'text-green-400' : 'text-rose-400'}`}>
+                  {origROI.toFixed(1)}%
+                </span>
+              </div>
+            </div>
+          </div>
+
+          {/* หลังปรับ (จำลองการปรับค่าธรรมเนียม) */}
+          <div className="rounded-xl bg-orange-500/5 border border-orange-500/20 p-4 space-y-4">
+            <h3 className="text-xs font-bold text-orange-500 uppercase tracking-wider border-b border-orange-500/10 pb-2 flex justify-between">
+              <span>หลังปรับ (ผลการจำลองใหม่)</span>
+              <span>รวม {simTotalPct.toFixed(2)}%</span>
+            </h3>
+            <div className="space-y-2 text-xs">
+              <div className="flex justify-between text-slate-400">
+                <span>ยอดรวมสินค้าก่อนลด</span>
+                <span className="font-mono">{fmt(simBeforeDiscount)}</span>
+              </div>
+              <div className="flex justify-between text-slate-400">
+                <span>ส่วนลดจากร้านค้า (รวม)</span>
+                <span className="font-mono text-rose-400">
+                  -{fmt(simDiscountAmount)}
+                </span>
+              </div>
+              {discounts.map((d, i) => d.value > 0 ? (
+                <div key={i} className="flex justify-between text-[10px] text-slate-500 pl-3">
+                  <span>- คูปอง #{i + 1} ({d.type === 'pct' ? `${d.value}%` : `฿${d.value}`})</span>
+                  <span className="font-mono text-rose-400">
+                    -{fmt(d.type === 'pct' ? simBeforeDiscount * (d.value / 100) : d.value)}
+                  </span>
+                </div>
+              ) : null)}
+              <div className="flex justify-between border-t border-orange-500/10 pt-1.5 font-medium text-slate-300">
+                <span>ยอดสินค้าสุทธิ (ฐานคิดคอม)</span>
+                <span className="font-mono text-orange-500">{fmt(baseAmt)}</span>
+              </div>
+              <div className="flex justify-between pl-3 text-slate-500">
+                <span>- ค่าคอมมิชชั่น ({simCommPct.toFixed(2)}%)</span>
+                <span className="font-mono text-rose-400">฿-{simCommAmt.toFixed(2)}</span>
+              </div>
+              <div className="flex justify-between pl-3 text-slate-500">
+                <span>- ค่าบริการ ({simServicePct.toFixed(2)}%)</span>
+                <span className="font-mono text-rose-400">฿-{simServiceAmt.toFixed(2)}</span>
+              </div>
+              <div className="flex justify-between pl-3 text-slate-500">
+                <span>- ค่าธุรกรรมการชำระเงิน ({simTransPct.toFixed(2)}%)</span>
+                <span className="font-mono text-rose-400">฿-{simTransAmt.toFixed(2)}</span>
+              </div>
+              {simAmsPct > 0 && (
+                <div className="flex justify-between pl-3 text-slate-500">
+                  <span>- ค่าคอมมิชชั่น AMS ({simAmsPct.toFixed(2)}%)</span>
+                  <span className="font-mono text-rose-400">฿-{simAmsAmt.toFixed(2)}</span>
+                </div>
+              )}
+              <div className="flex justify-between border-t border-orange-500/10 pt-1.5 font-medium text-slate-300">
+                <span>รวมค่าธรรมเนียมโดนหัก</span>
+                <span className="font-mono text-rose-400">฿-{simTotalAmt.toFixed(2)}</span>
+              </div>
+              <div className="flex justify-between border-t border-orange-500/10 pt-2 font-bold text-white text-sm">
+                <span>ยอดเงินโอนเข้าบัญชีสุทธิ</span>
+                <span className="font-mono text-orange-500">฿{simPayout.toFixed(2)}</span>
+              </div>
+              <div className="flex justify-between border-t border-orange-500/10 pt-1.5 text-slate-400">
+                <span>- ต้นทุนสินค้า (Cost)</span>
+                <span className="font-mono text-rose-400">฿-{simCost.toFixed(2)}</span>
+              </div>
+              <div className="flex justify-between border-t border-orange-500/10 pt-2 font-bold text-white text-sm">
+                <span>กำไรสุทธิ (Net Profit)</span>
+                <span className={`font-mono ${simProfit >= 0 ? 'text-green-400' : 'text-rose-400'}`}>
+                  {simProfit >= 0 ? '' : '-'}฿{Math.abs(simProfit).toFixed(2)}
+                </span>
+              </div>
+              <div className="flex justify-between text-slate-400 pl-3">
+                <span>กำไรต่อยอดขาย (Margin %)</span>
+                <span className={`font-mono ${simProfit >= 0 ? 'text-green-400' : 'text-rose-400'}`}>
+                  {simProfitMargin.toFixed(1)}%
+                </span>
+              </div>
+              <div className="flex justify-between text-slate-400 pl-3">
+                <span>กำไรต่อทุน (ROI %)</span>
+                <span className={`font-mono ${simProfit >= 0 ? 'text-green-400' : 'text-rose-400'}`}>
+                  {simROI.toFixed(1)}%
+                </span>
+              </div>
+            </div>
+          </div>
+        </div>
+
+        {/* Difference comparison status card */}
+        <div className={`mt-6 rounded-xl p-4 flex items-center justify-between text-xs border ${diffVal >= 0 ? 'bg-green-500/10 border-green-500/30 text-green-400' : 'bg-rose-500/10 border-rose-500/30 text-rose-400'}`}>
+          <div className="flex items-center gap-2">
+            <Info className="w-4 h-4" />
+            <span className="font-medium">
+              {diffVal >= 0
+                ? `ยอดรับเงินเพิ่มขึ้น ฿${diffVal.toFixed(2)} จากโครงสร้างธรรมเนียมใหม่`
+                : `ยอดเงินโอนเข้าบัญชีสุทธิจะต่างไป ฿${diffVal.toFixed(2)} (${diffVal >= 0 ? '+' : ''}${diffPct.toFixed(1)}%) เมื่อเทียบกับบิลจริงดั้งเดิม`}
+            </span>
+          </div>
+          <span className="font-bold font-mono text-sm">{diffVal >= 0 ? '+' : ''}฿{diffVal.toFixed(2)}</span>
+        </div>
+      </div>
+    </div>
+  )
+}
diff --git a/apps/admin/src/pages/TiktokPriceSimulatorPage.tsx b/apps/admin/src/pages/TiktokPriceSimulatorPage.tsx
index 0ec2603..f816204 100644
--- a/apps/admin/src/pages/TiktokPriceSimulatorPage.tsx
+++ b/apps/admin/src/pages/TiktokPriceSimulatorPage.tsx
@@ -1,4 +1,4 @@
-import { useState, useMemo, useEffect } from 'react'
+import { useState, useMemo } from 'react'
 import {
   Calculator,
   TrendingUp,