diff --git a/.claude/settings.local.json b/.claude/settings.local.json
index 382f312..4e66ed6 100644
--- a/.claude/settings.local.json
+++ b/.claude/settings.local.json
@@ -62,7 +62,10 @@
       "Bash(node check-user.mjs:*)",
       "Bash(xargs kill:*)",
       "mcp__playwright__browser_resize",
-      "Bash(pnpm db:seed:*)"
+      "Bash(pnpm db:seed:*)",
+      "Bash(pnpm exec nuxi@latest module add shadcn-nuxt:*)",
+      "Bash(pnpm exec shadcn-nuxt@latest add:*)",
+      "Bash(pnpm exec shadcn-nuxt:*)"
     ],
     "deny": [],
     "ask": []
diff --git a/app/app.vue b/app/app.vue
index b361e91..1032046 100644
--- a/app/app.vue
+++ b/app/app.vue
@@ -1,19 +1,17 @@
 <script setup lang="ts">
+// scroll-body="false": Prevents body scrolling when modals/dialogs are open.
+// When set to false, the body element's overflow is locked while any modal component
+// (like Dialog, Sheet, etc.) is open, preventing background content from scrolling.
+// This improves UX by keeping focus on the modal content.
+//
+// Bug fix: Without this setting, opening dropdown menus (e.g., the user profile menu
+// when clicking the avatar icon) would cause the body to receive a padding-right of
+// 15px, which shifted the entire page content 15px to the left. This prop prevents
+// that unwanted padding injection and layout shift.
 import { ConfigProvider } from 'reka-ui'
 </script>
 
 <template>
-  <!-- 
-    scroll-body="false": Prevents body scrolling when modals/dialogs are open.
-    When set to false, the body element's overflow is locked while any modal component
-    (like Dialog, Sheet, etc.) is open, preventing background content from scrolling.
-    This improves UX by keeping focus on the modal content.
-    
-    Bug fix: Without this setting, opening dropdown menus (e.g., the user profile menu
-    when clicking the avatar icon) would cause the body to receive a padding-right of
-    15px, which shifted the entire page content 15px to the left. This prop prevents
-    that unwanted padding injection and layout shift.
-  -->
   <ConfigProvider :scroll-body="false">
     <div>
       <NuxtPage />
diff --git a/app/components/UserMenu.vue b/app/components/UserMenu.vue
index 4185f28..fdbb0af 100644
--- a/app/components/UserMenu.vue
+++ b/app/components/UserMenu.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { User, LogOut } from 'lucide-vue-next'
+import { User, LogOut, Package } from 'lucide-vue-next'
 import {
   Avatar,
   AvatarFallback,
@@ -14,7 +14,7 @@ import {
   DropdownMenuTrigger,
 } from './ui/dropdown-menu'
 
-const { user, logout } = useAuth()
+const { user, loggedIn, logout } = useAuth()
 
 /**
  * Get user initials for Avatar fallback
@@ -42,29 +42,51 @@ async function handleLogout() {
 </script>
 
 <template>
-  <DropdownMenu>
+  <!-- Not logged in: Show login prompt -->
+  <NuxtLink
+    v-if="!loggedIn"
+    to="/auth"
+    class="flex items-center gap-2 px-4 py-2 rounded-2xl border-2 border-dashed border-muted-foreground/30 hover:border-experimenta-accent hover:bg-experimenta-accent/10 transition-all"
+    aria-label="Anmelden oder Registrieren"
+  >
+    <Avatar class="h-10 w-10 border-2 border-muted-foreground/30 rounded-2xl">
+      <AvatarFallback class="bg-muted text-muted-foreground rounded-2xl">
+        <User class="h-5 w-5" />
+      </AvatarFallback>
+    </Avatar>
+    <span class="text-sm font-medium hidden sm:inline">Anmelden</span>
+  </NuxtLink>
+
+  <!-- Logged in: Show user menu -->
+  <DropdownMenu v-else>
     <DropdownMenuTrigger as-child>
       <button
-        class="flex items-center gap-2 rounded-full focus:outline-none focus:ring-2 focus:ring-experimenta-accent focus:ring-offset-2 focus:ring-offset-experimenta-purple transition-all hover:scale-105 hover:shadow-lg"
+        class="flex items-center gap-3 rounded-2xl px-2 py-1.5 focus:outline-none focus:ring-2 focus:ring-experimenta-accent focus:ring-offset-2 transition-all hover:bg-white/10"
         aria-label="Benutzermenü öffnen"
       >
-        <Avatar class="h-12 w-12 border-3 border-experimenta-accent shadow-md bg-experimenta-accent">
+        <!-- Greeting text (Desktop only) -->
+        <span class="hidden md:inline text-sm font-medium text-white">
+          Hallo, {{ user?.firstName }}
+        </span>
+
+        <!-- Avatar with status ring (logged in indicator) -->
+        <Avatar class="h-10 w-10 md:h-12 md:w-12 border-3 border-experimenta-purple shadow-lg bg-experimenta-accent ring-2 ring-experimenta-accent ring-offset-2 ring-offset-white dark:ring-offset-zinc-950">
           <AvatarImage :src="undefined" :alt="user?.firstName" />
-          <AvatarFallback class="bg-experimenta-accent text-white font-bold text-base flex items-center justify-center w-full h-full">
+          <AvatarFallback class="bg-experimenta-accent text-white font-bold text-sm md:text-base flex items-center justify-center w-full h-full">
             {{ userInitials }}
           </AvatarFallback>
         </Avatar>
       </button>
     </DropdownMenuTrigger>
 
-    <DropdownMenuContent align="end" class="w-56 z-[200]">
-      <!-- User email (non-interactive) -->
-      <DropdownMenuLabel class="font-normal">
-        <div class="flex flex-col space-y-1">
-          <p class="text-sm font-medium leading-none">
+    <DropdownMenuContent align="end" class="w-64 z-[200]">
+      <!-- User info header -->
+      <DropdownMenuLabel class="font-normal py-3">
+        <div class="flex flex-col space-y-1.5">
+          <p class="text-base font-semibold leading-none">
             {{ user?.firstName }} {{ user?.lastName }}
           </p>
-          <p class="text-xs leading-none text-muted-foreground">
+          <p class="text-sm leading-none text-muted-foreground">
             {{ user?.email }}
           </p>
         </div>
@@ -72,18 +94,24 @@ async function handleLogout() {
 
       <DropdownMenuSeparator />
 
+      <!-- My Orders (Phase 5+ feature) -->
+      <DropdownMenuItem disabled class="py-2.5">
+        <Package class="mr-3 h-5 w-5" />
+        <span class="text-sm">Meine Bestellungen</span>
+      </DropdownMenuItem>
+
       <!-- Profile (disabled for now, placeholder for Phase 2+) -->
-      <DropdownMenuItem disabled>
-        <User class="mr-2 h-4 w-4" />
-        <span>Profil</span>
+      <DropdownMenuItem disabled class="py-2.5">
+        <User class="mr-3 h-5 w-5" />
+        <span class="text-sm">Profil bearbeiten</span>
       </DropdownMenuItem>
 
       <DropdownMenuSeparator />
 
       <!-- Logout -->
-      <DropdownMenuItem @click="handleLogout">
-        <LogOut class="mr-2 h-4 w-4" />
-        <span>Abmelden</span>
+      <DropdownMenuItem @click="handleLogout" class="py-2.5">
+        <LogOut class="mr-3 h-5 w-5" />
+        <span class="text-sm">Abmelden</span>
       </DropdownMenuItem>
     </DropdownMenuContent>
   </DropdownMenu>
diff --git a/app/components/navigation/AppHeader.vue b/app/components/navigation/AppHeader.vue
new file mode 100644
index 0000000..8d5d9c0
--- /dev/null
+++ b/app/components/navigation/AppHeader.vue
@@ -0,0 +1,96 @@
+<script setup lang="ts">
+import RoleSwitcher from './RoleSwitcher.vue'
+import AreaTabs from './AreaTabs.vue'
+import CartButton from './CartButton.vue'
+import UserMenu from '../UserMenu.vue'
+
+const { loggedIn } = useAuth()
+</script>
+
+<template>
+  <header class="sticky top-0 z-50 w-full">
+    <!-- Main header bar -->
+    <div class="container flex h-24 items-center justify-between px-4 md:px-6 lg:px-8">
+      <!-- Left: Logo + Role Switcher -->
+      <div class="flex items-center gap-6 md:gap-8">
+        <NuxtLink to="/" class="flex-shrink-0 transition-transform hover:scale-105">
+          <img
+            src="/img/experimenta-logo-white.svg"
+            alt="experimenta Logo"
+            class="h-14 w-auto md:h-16 drop-shadow-lg"
+          />
+        </NuxtLink>
+
+        <!-- Role Switcher (Desktop only) -->
+        <div class="hidden lg:block">
+          <RoleSwitcher />
+        </div>
+      </div>
+
+      <!-- Right: Cart + User Menu -->
+      <div class="flex items-center gap-3 md:gap-6">
+        <!-- Cart Button (only visible when logged in) -->
+        <CartButton v-if="loggedIn" />
+
+        <!-- User Menu -->
+        <UserMenu />
+      </div>
+    </div>
+
+    <!-- Secondary navigation bar (Product areas) - No borders, gradient separation -->
+    <div class="area-tabs-section">
+      <div class="container px-4 md:px-6 lg:px-8 py-3">
+        <AreaTabs />
+      </div>
+    </div>
+
+    <!-- Mobile: Role switcher in collapsible section (optional) -->
+    <div class="lg:hidden mobile-role-section">
+      <div class="container px-4 py-2.5">
+        <RoleSwitcher />
+      </div>
+    </div>
+  </header>
+</template>
+
+<style scoped>
+/* Custom experimenta styling */
+header {
+  background: linear-gradient(
+    135deg,
+    rgba(46, 16, 101, 0.98) 0%,
+    rgba(46, 16, 101, 0.95) 100%
+  );
+  color: white;
+}
+
+/* Area tabs section with subtle gradient separator (no borders) */
+.area-tabs-section {
+  background: linear-gradient(
+    180deg,
+    rgba(255, 255, 255, 0.08) 0%,
+    rgba(255, 255, 255, 0.03) 100%
+  );
+}
+
+/* Mobile role section */
+.mobile-role-section {
+  background: rgba(255, 255, 255, 0.05);
+}
+
+/* Logo styling */
+img[alt='experimenta Logo'] {
+  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.3));
+}
+
+/* Ensure text is white in header */
+:deep(button),
+:deep(a) {
+  color: white;
+}
+
+:deep(.text-foreground),
+:deep(.text-muted-foreground) {
+  color: rgba(255, 255, 255, 0.9) !important;
+}
+</style>
diff --git a/app/components/navigation/AreaTabs.vue b/app/components/navigation/AreaTabs.vue
new file mode 100644
index 0000000..c20a1a1
--- /dev/null
+++ b/app/components/navigation/AreaTabs.vue
@@ -0,0 +1,131 @@
+<script setup lang="ts">
+import { Wrench, FlaskConical, Ticket, Sparkles } from 'lucide-vue-next'
+import { Tabs, TabsList, TabsTrigger } from '@/components/ui/tabs'
+import { Badge } from '@/components/ui/badge'
+
+interface ProductArea {
+  id: string
+  label: string
+  icon: any
+  enabled: boolean
+  badge?: string
+  route: string
+}
+
+const areas: ProductArea[] = [
+  {
+    id: 'makerspace',
+    label: 'Makerspace',
+    icon: Wrench,
+    enabled: true,
+    route: '/products',
+  },
+  {
+    id: 'labs',
+    label: 'Labore',
+    icon: FlaskConical,
+    enabled: false,
+    badge: 'Demnächst',
+    route: '/labs',
+  },
+  {
+    id: 'experimenta',
+    label: 'experimenta',
+    icon: Sparkles,
+    enabled: false,
+    badge: 'Demnächst',
+    route: '/experimenta',
+  },
+]
+
+const route = useRoute()
+
+const currentArea = computed(() => {
+  // Determine current area based on route
+  if (route.path.startsWith('/products') || route.path === '/') {
+    return 'makerspace'
+  } else if (route.path.startsWith('/labs')) {
+    return 'labs'
+  } else if (route.path.startsWith('/experimenta')) {
+    return 'experimenta'
+  }
+  return 'makerspace'
+})
+
+function navigateToArea(area: ProductArea) {
+  if (area.enabled) {
+    navigateTo(area.route)
+  }
+}
+</script>
+
+<template>
+  <div class="w-full">
+    <!-- Desktop: Tabs -->
+    <Tabs :model-value="currentArea" class="hidden md:block">
+      <TabsList class="h-auto p-1 bg-muted/50">
+        <TabsTrigger
+          v-for="area in areas"
+          :key="area.id"
+          :value="area.id"
+          :disabled="!area.enabled"
+          :class="[
+            'gap-2 data-[state=active]:bg-white dark:data-[state=active]:bg-zinc-900',
+            !area.enabled && 'opacity-60 cursor-not-allowed',
+          ]"
+          @click="navigateToArea(area)"
+        >
+          <component :is="area.icon" class="h-4 w-4" />
+          <span>{{ area.label }}</span>
+          <Badge v-if="area.badge" variant="secondary" class="ml-1 text-[10px] px-1.5 py-0">
+            {{ area.badge }}
+          </Badge>
+        </TabsTrigger>
+      </TabsList>
+    </Tabs>
+
+    <!-- Mobile: Horizontal scroll with cards -->
+    <div class="md:hidden overflow-x-auto scrollbar-hide">
+      <div class="flex gap-2 p-1 min-w-max">
+        <button
+          v-for="area in areas"
+          :key="area.id"
+          :disabled="!area.enabled"
+          :class="[
+            'flex items-center gap-2 px-4 py-2 rounded-lg border-2 transition-all whitespace-nowrap',
+            currentArea === area.id
+              ? 'bg-purple-600 text-white border-purple-600'
+              : 'bg-white dark:bg-zinc-900 border-border hover:border-purple-300',
+            !area.enabled && 'opacity-60 cursor-not-allowed',
+          ]"
+          @click="navigateToArea(area)"
+        >
+          <component
+            :is="area.icon"
+            :class="['h-4 w-4', currentArea === area.id ? 'text-white' : '']"
+          />
+          <span class="font-medium">{{ area.label }}</span>
+          <Badge
+            v-if="area.badge"
+            :variant="currentArea === area.id ? 'secondary' : 'outline'"
+            class="text-[10px] px-1.5 py-0"
+          >
+            {{ area.badge }}
+          </Badge>
+        </button>
+      </div>
+    </div>
+  </div>
+</template>
+
+<style scoped>
+/* Hide scrollbar but keep functionality */
+.scrollbar-hide::-webkit-scrollbar {
+  display: none;
+}
+
+.scrollbar-hide {
+  -ms-overflow-style: none;
+  scrollbar-width: none;
+}
+</style>
diff --git a/app/components/navigation/BottomNav.vue b/app/components/navigation/BottomNav.vue
new file mode 100644
index 0000000..f2b08c0
--- /dev/null
+++ b/app/components/navigation/BottomNav.vue
@@ -0,0 +1,147 @@
+<script setup lang="ts">
+import { Home, Wrench, ShoppingCart, User } from 'lucide-vue-next'
+import { Badge } from '@/components/ui/badge'
+
+const route = useRoute()
+const { loggedIn } = useAuth()
+
+interface NavItem {
+  id: string
+  label: string
+  icon: any
+  route: string
+  badge?: number
+  requireAuth?: boolean
+}
+
+const navItems: NavItem[] = [
+  {
+    id: 'home',
+    label: 'Start',
+    icon: Home,
+    route: '/',
+  },
+  {
+    id: 'products',
+    label: 'Makerspace',
+    icon: Wrench,
+    route: '/products',
+  },
+  {
+    id: 'cart',
+    label: 'Warenkorb',
+    icon: ShoppingCart,
+    route: '/cart',
+    badge: 0, // TODO: Get from cart store
+    requireAuth: true,
+  },
+  {
+    id: 'profile',
+    label: 'Profil',
+    icon: User,
+    route: '/auth',
+  },
+]
+
+const isActive = (itemRoute: string) => {
+  if (itemRoute === '/') {
+    return route.path === '/'
+  }
+  return route.path.startsWith(itemRoute)
+}
+
+function handleNavClick(item: NavItem) {
+  if (item.requireAuth && !loggedIn.value) {
+    // Redirect to auth page
+    navigateTo('/auth')
+    return
+  }
+
+  navigateTo(item.route)
+}
+</script>
+
+<template>
+  <!-- Mobile Bottom Navigation - only visible on small screens -->
+  <nav
+    class="fixed bottom-0 left-0 right-0 z-50 md:hidden border-t bg-background/95 backdrop-blur supports-[backdrop-filter]:bg-background/80 safe-area-inset-bottom"
+    role="navigation"
+    aria-label="Mobile Navigation"
+  >
+    <div class="flex items-center justify-around h-16 px-2">
+      <button
+        v-for="item in navItems"
+        :key="item.id"
+        :class="[
+          'flex flex-col items-center justify-center flex-1 gap-1 py-2 px-1 rounded-lg transition-all relative',
+          isActive(item.route)
+            ? 'text-experimenta-accent bg-experimenta-accent/10'
+            : 'text-muted-foreground hover:text-foreground hover:bg-muted',
+          item.requireAuth && !loggedIn && 'opacity-75',
+        ]"
+        @click="handleNavClick(item)"
+        :aria-label="item.label"
+        :aria-current="isActive(item.route) ? 'page' : undefined"
+      >
+        <!-- Icon with badge -->
+        <div class="relative">
+          <component
+            :is="item.icon"
+            :class="[
+              'h-5 w-5 transition-transform',
+              isActive(item.route) && 'scale-110',
+            ]"
+          />
+
+          <!-- Badge for cart -->
+          <Badge
+            v-if="item.badge && item.badge > 0"
+            class="absolute -top-2 -right-2 h-4 min-w-[16px] px-1 flex items-center justify-center text-[10px] bg-experimenta-accent"
+          >
+            {{ item.badge > 99 ? '99+' : item.badge }}
+          </Badge>
+
+          <!-- Login indicator dot for profile when not logged in -->
+          <span
+            v-if="item.id === 'profile' && !loggedIn"
+            class="absolute -top-1 -right-1 h-2 w-2 rounded-full bg-yellow-500 animate-pulse"
+            aria-label="Nicht angemeldet"
+          />
+        </div>
+
+        <!-- Label -->
+        <span
+          :class="[
+            'text-[10px] font-medium transition-all',
+            isActive(item.route) && 'font-bold',
+          ]"
+        >
+          {{ item.label }}
+        </span>
+
+        <!-- Active indicator bar -->
+        <span
+          v-if="isActive(item.route)"
+          class="absolute bottom-0 left-1/2 -translate-x-1/2 w-12 h-0.5 bg-experimenta-accent rounded-full"
+          aria-hidden="true"
+        />
+      </button>
+    </div>
+
+    <!-- Safe area spacer for devices with notches/home indicators -->
+    <div class="h-[env(safe-area-inset-bottom)] bg-background" />
+  </nav>
+</template>
+
+<style scoped>
+/* Support for safe area insets (iPhone X+) */
+.safe-area-inset-bottom {
+  padding-bottom: env(safe-area-inset-bottom);
+}
+
+/* Ensure bottom nav doesn't overlay content */
+@media (max-width: 768px) {
+  /* Add bottom padding to body/main to account for fixed bottom nav */
+  /* This will be handled in the layout component */
+}
+</style>
diff --git a/app/components/navigation/CartButton.vue b/app/components/navigation/CartButton.vue
new file mode 100644
index 0000000..2fdd178
--- /dev/null
+++ b/app/components/navigation/CartButton.vue
@@ -0,0 +1,43 @@
+<script setup lang="ts">
+import { ShoppingCart } from 'lucide-vue-next'
+import { Badge } from '@/components/ui/badge'
+
+// TODO: This will come from cart store/composable in Phase 5
+const cartItemCount = ref(0)
+
+const hasItems = computed(() => cartItemCount.value > 0)
+</script>
+
+<template>
+  <NuxtLink
+    to="/cart"
+    class="relative inline-flex items-center justify-center rounded-full p-3 transition-all hover:bg-experimenta-accent/10 focus:outline-none focus:ring-2 focus:ring-experimenta-accent focus:ring-offset-2"
+    aria-label="Warenkorb"
+  >
+    <ShoppingCart class="h-6 w-6 text-foreground" />
+
+    <!-- Item count badge -->
+    <Transition
+      enter-active-class="transition-all duration-200 ease-out"
+      enter-from-class="scale-0 opacity-0"
+      enter-to-class="scale-100 opacity-100"
+      leave-active-class="transition-all duration-150 ease-in"
+      leave-from-class="scale-100 opacity-100"
+      leave-to-class="scale-0 opacity-0"
+    >
+      <Badge
+        v-if="hasItems"
+        class="absolute -top-1 -right-1 h-5 min-w-[20px] px-1 flex items-center justify-center bg-experimenta-accent text-white text-xs font-bold border-2 border-white dark:border-zinc-950"
+      >
+        {{ cartItemCount > 99 ? '99+' : cartItemCount }}
+      </Badge>
+    </Transition>
+
+    <!-- Pulse animation when items are added (optional) -->
+    <span
+      v-if="hasItems"
+      class="absolute inset-0 rounded-full bg-experimenta-accent/20 animate-ping opacity-75"
+      aria-hidden="true"
+    />
+  </NuxtLink>
+</template>
diff --git a/app/components/navigation/RoleSwitcher.vue b/app/components/navigation/RoleSwitcher.vue
new file mode 100644
index 0000000..0674ffd
--- /dev/null
+++ b/app/components/navigation/RoleSwitcher.vue
@@ -0,0 +1,142 @@
+<script setup lang="ts">
+import { User, GraduationCap, Building2, Check } from 'lucide-vue-next'
+import { Badge } from '@/components/ui/badge'
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuLabel,
+  DropdownMenuSeparator,
+  DropdownMenuTrigger,
+} from '@/components/ui/dropdown-menu'
+import { Button } from '@/components/ui/button'
+
+// User role types matching our database schema
+type UserRole = 'individual' | 'educator' | 'company'
+
+interface RoleOption {
+  value: UserRole
+  label: string
+  description: string
+  icon: any
+  color: string
+  enabled: boolean
+  badge?: string
+}
+
+const roles: RoleOption[] = [
+  {
+    value: 'individual',
+    label: 'Privatperson',
+    description: 'für mich',
+    icon: User,
+    color: 'text-purple-600',
+    enabled: true,
+  },
+  {
+    value: 'educator',
+    label: 'Pädagoge',
+    description: 'für Schule/Kita',
+    icon: GraduationCap,
+    color: 'text-orange-500',
+    enabled: false,
+    badge: 'Demnächst',
+  },
+  {
+    value: 'company',
+    label: 'Firma',
+    description: 'für Unternehmen',
+    icon: Building2,
+    color: 'text-blue-600',
+    enabled: false,
+    badge: 'Demnächst',
+  },
+]
+
+// Current role - will come from user session later
+const currentRole = ref<UserRole>('individual')
+
+const currentRoleData = computed(() => {
+  return roles.find((r) => r.value === currentRole.value) || roles[0]
+})
+
+function switchRole(role: UserRole) {
+  if (roles.find((r) => r.value === role)?.enabled) {
+    currentRole.value = role
+    // TODO: Update user session/store with new role
+  }
+}
+</script>
+
+<template>
+  <DropdownMenu>
+    <DropdownMenuTrigger as-child>
+      <Button
+        variant="outline"
+        class="gap-2 border-2 border-white/30 bg-white/5 text-white hover:bg-white/10 hover:border-white/50 transition-all duration-200 group"
+        title="Rolle wechseln"
+      >
+        <!-- Context label + role -->
+        <span class="text-xs text-white/70 font-normal hidden md:inline">Du kaufst als:</span>
+        <component :is="currentRoleData.icon" class="h-4 w-4 text-white" />
+        <span class="font-medium text-white">{{ currentRoleData.label }}</span>
+        <svg
+          xmlns="http://www.w3.org/2000/svg"
+          width="16"
+          height="16"
+          viewBox="0 0 24 24"
+          fill="none"
+          stroke="currentColor"
+          stroke-width="2"
+          stroke-linecap="round"
+          stroke-linejoin="round"
+          class="ml-1 opacity-70 text-white group-hover:opacity-100 transition-opacity"
+        >
+          <polyline points="6 9 12 15 18 9" />
+        </svg>
+      </Button>
+    </DropdownMenuTrigger>
+    <DropdownMenuContent align="start" class="w-64">
+      <DropdownMenuLabel class="text-sm font-normal text-muted-foreground py-3">
+        Für wen kaufst du?
+      </DropdownMenuLabel>
+      <DropdownMenuSeparator />
+
+      <DropdownMenuItem
+        v-for="role in roles"
+        :key="role.value"
+        :disabled="!role.enabled"
+        :class="[
+          'gap-3 py-3 cursor-pointer',
+          !role.enabled && 'opacity-60 cursor-not-allowed',
+          currentRole === role.value && 'bg-purple-50 dark:bg-purple-950',
+        ]"
+        @click="switchRole(role.value)"
+      >
+        <component :is="role.icon" :class="['h-5 w-5', role.color]" />
+
+        <div class="flex-1 flex flex-col gap-1">
+          <span class="text-sm font-semibold">{{ role.label }}</span>
+          <span class="text-sm text-muted-foreground">{{ role.description }}</span>
+        </div>
+
+        <Check
+          v-if="currentRole === role.value"
+          class="h-5 w-5 text-green-600 flex-shrink-0"
+        />
+
+        <Badge v-if="role.badge" variant="secondary" class="text-xs px-2 py-0.5 flex-shrink-0">
+          {{ role.badge }}
+        </Badge>
+      </DropdownMenuItem>
+
+      <DropdownMenuSeparator />
+
+      <div class="px-3 py-2.5 text-sm text-muted-foreground">
+        <p class="leading-relaxed">
+          💡 Weitere Rollen werden in Kürze verfügbar sein.
+        </p>
+      </div>
+    </DropdownMenuContent>
+  </DropdownMenu>
+</template>
diff --git a/app/components/ui/badge/Badge.vue b/app/components/ui/badge/Badge.vue
new file mode 100644
index 0000000..68288d6
--- /dev/null
+++ b/app/components/ui/badge/Badge.vue
@@ -0,0 +1,24 @@
+<script setup lang="ts">
+import { type HTMLAttributes, computed } from 'vue'
+import { type BadgeVariants, badgeVariants } from '.'
+import { cn } from '@/lib/utils'
+
+interface Props {
+  variant?: BadgeVariants['variant']
+  class?: HTMLAttributes['class']
+}
+
+const props = defineProps<Props>()
+
+const delegatedProps = computed(() => {
+  const { class: _, ...delegated } = props
+
+  return delegated
+})
+</script>
+
+<template>
+  <div :class="cn(badgeVariants({ variant }), props.class)" v-bind="delegatedProps">
+    <slot />
+  </div>
+</template>
diff --git a/app/components/ui/badge/index.ts b/app/components/ui/badge/index.ts
new file mode 100644
index 0000000..536e84f
--- /dev/null
+++ b/app/components/ui/badge/index.ts
@@ -0,0 +1,24 @@
+import { type VariantProps, cva } from 'class-variance-authority'
+
+export { default as Badge } from './Badge.vue'
+
+export const badgeVariants = cva(
+  'inline-flex items-center rounded-md border px-2.5 py-0.5 text-xs font-semibold transition-colors focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2',
+  {
+    variants: {
+      variant: {
+        default: 'border-transparent bg-primary text-primary-foreground shadow hover:bg-primary/80',
+        secondary: 'border-transparent bg-secondary text-secondary-foreground hover:bg-secondary/80',
+        destructive: 'border-transparent bg-destructive text-destructive-foreground shadow hover:bg-destructive/80',
+        outline: 'text-foreground',
+        success: 'border-transparent bg-green-500 text-white shadow hover:bg-green-600',
+        warning: 'border-transparent bg-yellow-500 text-white shadow hover:bg-yellow-600',
+      },
+    },
+    defaultVariants: {
+      variant: 'default',
+    },
+  }
+)
+
+export type BadgeVariants = VariantProps<typeof badgeVariants>
diff --git a/app/components/ui/separator/Separator.vue b/app/components/ui/separator/Separator.vue
new file mode 100644
index 0000000..773edac
--- /dev/null
+++ b/app/components/ui/separator/Separator.vue
@@ -0,0 +1,32 @@
+<script setup lang="ts">
+import { type HTMLAttributes, computed } from 'vue'
+import { SeparatorRoot, type SeparatorRootProps } from 'reka-ui'
+import { cn } from '@/lib/utils'
+
+const props = withDefaults(
+  defineProps<SeparatorRootProps & { class?: HTMLAttributes['class'] }>(),
+  {
+    orientation: 'horizontal',
+    decorative: true,
+  }
+)
+
+const delegatedProps = computed(() => {
+  const { class: _, ...delegated } = props
+
+  return delegated
+})
+</script>
+
+<template>
+  <SeparatorRoot
+    v-bind="delegatedProps"
+    :class="
+      cn(
+        'shrink-0 bg-border',
+        props.orientation === 'horizontal' ? 'h-[1px] w-full' : 'h-full w-[1px]',
+        props.class
+      )
+    "
+  />
+</template>
diff --git a/app/components/ui/separator/index.ts b/app/components/ui/separator/index.ts
new file mode 100644
index 0000000..2287bcb
--- /dev/null
+++ b/app/components/ui/separator/index.ts
@@ -0,0 +1 @@
+export { default as Separator } from './Separator.vue'
diff --git a/app/layouts/default.vue b/app/layouts/default.vue
index 302ba80..275aadb 100644
--- a/app/layouts/default.vue
+++ b/app/layouts/default.vue
@@ -1,18 +1,31 @@
 <script setup lang="ts">
-// Default layout with Header and Footer components
+import AppHeader from '~/components/navigation/AppHeader.vue'
+import BottomNav from '~/components/navigation/BottomNav.vue'
 </script>
 
 <template>
   <div class="min-h-screen flex flex-col">
-    <!-- Header -->
-    <CommonHeader />
+    <!-- New App Header with full navigation -->
+    <AppHeader />
 
-    <!-- Main content -->
-    <main class="flex-1">
+    <!-- Main content with bottom padding for mobile nav -->
+    <main class="flex-1 pb-20 md:pb-0">
       <slot />
     </main>
 
     <!-- Footer -->
     <CommonFooter />
+
+    <!-- Mobile Bottom Navigation -->
+    <BottomNav />
   </div>
 </template>
+
+<style scoped>
+/* Ensure main content doesn't get hidden behind bottom nav on mobile */
+@media (max-width: 768px) {
+  main {
+    padding-bottom: calc(4rem + env(safe-area-inset-bottom, 0px));
+  }
+}
+</style>
diff --git a/app/pages/internal/product-detail-demo.vue b/app/pages/internal/product-detail-demo.vue
new file mode 100644
index 0000000..1374c6d
--- /dev/null
+++ b/app/pages/internal/product-detail-demo.vue
@@ -0,0 +1,195 @@
+<script setup lang="ts">
+// Demo page to showcase product detail page design
+
+definePageMeta({
+  layout: 'styleguide',
+})
+
+// Sample product data
+const product = {
+  id: 'makerspace-jk-2025',
+  image: '/img/makerspace-jk-2025.jpg',
+  name: 'Makerspace Jahreskarte',
+  description:
+    'Unbegrenzter Zugang zum Makerspace für 365 Tage. Nutze modernste Werkzeuge, 3D-Drucker, Lasercutter und vieles mehr. Perfekt für Maker, Tüftler und kreative Köpfe.',
+  price: 120.0,
+  stockQuantity: 100,
+}
+
+// Format price in EUR
+const formattedPrice = computed(() => {
+  return new Intl.NumberFormat('de-DE', {
+    style: 'currency',
+    currency: 'EUR',
+  }).format(product.price)
+})
+
+// Handle "Add to Cart" action (placeholder)
+const handleAddToCart = () => {
+  alert('Add to Cart Demo - Diese Funktion wird in einer späteren Phase implementiert.')
+}
+</script>
+
+<template>
+  <div class="min-h-screen bg-gradient-primary px-4 py-12 md:px-6 lg:px-8">
+    <!-- Page Header -->
+    <div class="mx-auto mb-12 max-w-container-wide text-center">
+      <h1 class="mb-4 text-4xl font-bold text-white md:text-5xl">
+        Produktdetailseite Demo
+      </h1>
+      <p class="mx-auto max-w-2xl text-lg text-white/80">
+        Mobile-optimierte Produktdetailseite für Jahreskarten mit Glassmorphism-Design.
+      </p>
+    </div>
+
+    <!-- Product Detail Example -->
+    <div class="mx-auto max-w-container-narrow">
+      <div class="overflow-hidden rounded-2xl border border-white/20 bg-white/10 shadow-glass backdrop-blur-lg">
+        <!-- Product Image (flush with top) -->
+        <div class="relative aspect-[16/9] w-full overflow-hidden bg-purple-dark">
+          <img
+            :src="product.image"
+            :alt="product.name"
+            class="h-full w-full object-cover"
+          />
+          <!-- Gradient overlay -->
+          <div
+            class="absolute inset-0 bg-gradient-to-t from-purple-darkest/80 via-transparent to-transparent"
+          />
+        </div>
+
+        <!-- Product Content -->
+        <div class="space-y-6 p-8">
+          <!-- Title -->
+          <h2 class="text-3xl font-bold text-white md:text-4xl">
+            {{ product.name }}
+          </h2>
+
+          <!-- Description -->
+          <p class="text-lg leading-relaxed text-white/90">
+            {{ product.description }}
+          </p>
+
+          <!-- Product Details -->
+          <div class="grid gap-4 sm:grid-cols-2">
+            <!-- Price Card -->
+            <div class="rounded-xl bg-white/5 p-4 backdrop-blur-sm">
+              <span class="mb-1 block text-xs uppercase tracking-wide text-white/60">Preis</span>
+              <span class="text-3xl font-bold text-experimenta-accent">
+                {{ formattedPrice }}
+              </span>
+            </div>
+
+            <!-- Availability Card -->
+            <div class="rounded-xl bg-white/5 p-4 backdrop-blur-sm">
+              <span class="mb-1 block text-xs uppercase tracking-wide text-white/60">Verfügbarkeit</span>
+              <div class="flex items-center gap-2 text-xl font-semibold text-green">
+                <CheckCircle :size="24" />
+                <span>Sofort</span>
+              </div>
+            </div>
+          </div>
+
+          <!-- Features / Benefits -->
+          <div class="rounded-xl border border-white/20 bg-white/5 p-6 backdrop-blur-sm">
+            <h3 class="mb-4 text-xl font-semibold text-white">
+              Was du mit dieser Karte bekommst:
+            </h3>
+            <ul class="space-y-3 text-white/90">
+              <li class="flex items-start gap-2">
+                <span class="mt-1 text-experimenta-accent">✓</span>
+                <span>365 Tage unbegrenzter Zugang</span>
+              </li>
+              <li class="flex items-start gap-2">
+                <span class="mt-1 text-experimenta-accent">✓</span>
+                <span>Keine versteckten Kosten</span>
+              </li>
+              <li class="flex items-start gap-2">
+                <span class="mt-1 text-experimenta-accent">✓</span>
+                <span>Sofort einsatzbereit nach Kauf</span>
+              </li>
+              <li class="flex items-start gap-2">
+                <span class="mt-1 text-experimenta-accent">✓</span>
+                <span>Flexible Nutzung – komme so oft du möchtest</span>
+              </li>
+            </ul>
+          </div>
+
+          <!-- Action Buttons -->
+          <div class="flex flex-col gap-4 sm:flex-row">
+            <Button
+              variant="experimenta"
+              size="experimenta"
+              class="flex-1"
+              @click="handleAddToCart"
+            >
+              In den Warenkorb
+            </Button>
+            <NuxtLink to="/internal/products-demo" class="btn-secondary flex-1 text-center">
+              Weitere Produkte ansehen
+            </NuxtLink>
+          </div>
+        </div>
+      </div>
+    </div>
+
+    <!-- Design Features -->
+    <div class="mx-auto mt-20 max-w-container-wide">
+      <div class="rounded-2xl border border-white/20 bg-white/10 p-8 backdrop-blur-lg">
+        <h2 class="mb-6 text-2xl font-bold text-white">
+          Design Features
+        </h2>
+        <ul class="space-y-3 text-white/90">
+          <li class="flex items-start gap-2">
+            <span class="mt-1 text-experimenta-accent">✓</span>
+            <span><strong>Hero Image:</strong> 16:9 Aspect Ratio, bündig mit oberer Kartenrundung</span>
+          </li>
+          <li class="flex items-start gap-2">
+            <span class="mt-1 text-experimenta-accent">✓</span>
+            <span><strong>Glassmorphism Card:</strong> Backdrop blur mit experimenta Farbpalette</span>
+          </li>
+          <li class="flex items-start gap-2">
+            <span class="mt-1 text-experimenta-accent">✓</span>
+            <span><strong>Info Cards:</strong> Preis und Verfügbarkeit in separaten Cards mit Icons</span>
+          </li>
+          <li class="flex items-start gap-2">
+            <span class="mt-1 text-experimenta-accent">✓</span>
+            <span><strong>Feature List:</strong> Mit Häkchen-Icons in experimenta-accent Farbe</span>
+          </li>
+          <li class="flex items-start gap-2">
+            <span class="mt-1 text-experimenta-accent">✓</span>
+            <span><strong>Button Combo:</strong> Primary (experimenta) + Secondary (transparent border)</span>
+          </li>
+          <li class="flex items-start gap-2">
+            <span class="mt-1 text-experimenta-accent">✓</span>
+            <span><strong>Mobile-First:</strong> Responsive Grid (2 Spalten → 1 Spalte auf Mobile)</span>
+          </li>
+          <li class="flex items-start gap-2">
+            <span class="mt-1 text-experimenta-accent">✓</span>
+            <span><strong>Status-Anzeige:</strong> "Verfügbarkeit: Sofort" mit CheckCircle Icon (statt "Auf Lager")</span>
+          </li>
+        </ul>
+      </div>
+    </div>
+
+    <!-- Usage Example -->
+    <div class="mx-auto mt-12 max-w-container-wide">
+      <div class="rounded-2xl border border-white/20 bg-purple-darker/50 p-8 backdrop-blur-lg">
+        <h2 class="mb-4 text-2xl font-bold text-white">
+          Implementation
+        </h2>
+        <p class="mb-4 text-white/90">
+          Die Produktdetailseite ist unter <code class="rounded bg-white/10 px-2 py-1">/products/[id]</code> verfügbar.
+          Produktdaten werden aus der PostgreSQL-Datenbank über die API geladen.
+        </p>
+        <pre class="overflow-x-auto rounded-lg bg-purple-darkest p-4 text-sm text-white/90"><code>// API Endpoints
+GET /api/products       - List all products
+GET /api/products/[id]  - Get single product
+
+// Page Routes
+/products              - Product listing (ProductGrid)
+/products/[id]         - Product detail page</code></pre>
+      </div>
+    </div>
+  </div>
+</template>
diff --git a/app/pages/internal/styleguide.vue b/app/pages/internal/styleguide.vue
index 77ca3b5..1cfd700 100644
--- a/app/pages/internal/styleguide.vue
+++ b/app/pages/internal/styleguide.vue
@@ -56,6 +56,7 @@ const copyCode = async (code: string) => {
           <li><a href="#progress" class="link-primary">Progress Bars</a></li>
           <li><a href="#components" class="link-primary">Components</a></li>
           <li><a href="/internal/products-demo" class="link-accent">→ Product Cards Demo</a></li>
+          <li><a href="/internal/product-detail-demo" class="link-accent">→ Product Detail Demo</a></li>
         </ul>
       </nav>
 
@@ -243,6 +244,46 @@ const copyCode = async (code: string) => {
           </details>
         </div>
 
+        <!-- Secondary Button (btn-secondary) -->
+        <div class="card-glass mb-8">
+          <h3 class="text-2xl font-semibold mb-4 text-white">Secondary Button (.btn-secondary)</h3>
+          <p class="mb-6 text-white/90">
+            Transparent button with white border. Perfect for secondary actions alongside primary buttons.
+            Features a smooth hover effect that fills with white background.
+          </p>
+
+          <div class="flex flex-wrap gap-4 items-center mb-6">
+            <a href="#" class="btn-secondary" @click.prevent="handleClick">
+              Secondary Action
+            </a>
+
+            <NuxtLink to="#" class="btn-secondary">
+              As NuxtLink
+            </NuxtLink>
+          </div>
+
+          <div class="bg-white/5 p-4 rounded-lg mb-4">
+            <p class="text-sm text-white/70 mb-2"><strong>Usage Example:</strong> Product detail pages</p>
+            <p class="text-sm text-white/70">
+              Use alongside primary "In den Warenkorb" button for actions like "Weitere Produkte ansehen".
+              The transparent background integrates beautifully with glassmorphism design.
+            </p>
+          </div>
+
+          <details class="bg-white/5 p-4 rounded-lg">
+            <summary class="cursor-pointer text-white/90 font-semibold">Show Code</summary>
+            <pre class="mt-4 text-sm text-white/80 overflow-x-auto"><code>&lt;!-- As Link --&gt;
+&lt;a href="#" class="btn-secondary"&gt;
+  Secondary Action
+&lt;/a&gt;
+
+&lt;!-- As NuxtLink --&gt;
+&lt;NuxtLink to="/products" class="btn-secondary"&gt;
+  Weitere Produkte ansehen
+&lt;/NuxtLink&gt;</code></pre>
+          </details>
+        </div>
+
         <!-- shadcn-nuxt Button Variants -->
         <div class="card-glass">
           <h3 class="text-2xl font-semibold mb-4 text-white">shadcn-nuxt Button Variants</h3>
@@ -672,7 +713,7 @@ const copyCode = async (code: string) => {
         </div>
 
         <!-- Product Cards Demo Link -->
-        <div class="card-glass">
+        <div class="card-glass mb-8">
           <h3 class="text-2xl font-semibold mb-4 text-white">Product Cards</h3>
           <p class="text-white/90 mb-6">
             Speziell gestaltete Produktkarten für Jahreskarten und andere Produkte der experimenta.
@@ -684,6 +725,20 @@ const copyCode = async (code: string) => {
             </NuxtLink>
           </div>
         </div>
+
+        <!-- Product Detail Demo Link -->
+        <div class="card-glass">
+          <h3 class="text-2xl font-semibold mb-4 text-white">Product Detail Page</h3>
+          <p class="text-white/90 mb-6">
+            Vollständige Produktdetailseite für Jahreskarten mit Hero-Image, Preis- und Verfügbarkeitsanzeige,
+            Feature-Liste und Call-to-Action Buttons. Zeigt alle Design-Patterns für Produktseiten.
+          </p>
+          <div class="flex gap-4">
+            <NuxtLink to="/internal/product-detail-demo" class="btn-experimenta">
+              Zur Product Detail Demo →
+            </NuxtLink>
+          </div>
+        </div>
       </section>
 
       <!-- Footer -->
diff --git a/app/pages/products/[id].vue b/app/pages/products/[id].vue
index 7a69ac1..5a843cb 100644
--- a/app/pages/products/[id].vue
+++ b/app/pages/products/[id].vue
@@ -181,10 +181,8 @@ const handleAddToCart = () => {
               >
                 {{ product.stockQuantity > 0 ? 'In den Warenkorb' : 'Nicht verfügbar' }}
               </Button>
-              <NuxtLink to="/products" class="flex-1">
-                <Button variant="outline" size="experimenta" class="w-full">
-                  Weitere Produkte ansehen
-                </Button>
+              <NuxtLink to="/products" class="btn-secondary flex-1 text-center">
+                Weitere Produkte ansehen
               </NuxtLink>
             </div>
           </div>
diff --git a/tailwind.config.ts b/tailwind.config.ts
index a26b4a3..4590970 100644
--- a/tailwind.config.ts
+++ b/tailwind.config.ts
@@ -65,7 +65,19 @@ export default {
         red: '#E40521',
 
         // Purple Variants (Background)
+        'experimenta-purple': '#2e1065',
         purple: {
+          50: '#f5f3ff',
+          100: '#ede9fe',
+          200: '#ddd6fe',
+          300: '#c4b5fd',
+          400: '#a78bfa',
+          500: '#8b5cf6',
+          600: '#7c3aed',
+          700: '#6d28d9',
+          800: '#5b21b6',
+          900: '#4c1d95',
+          950: '#2e1065',
           dark: '#2e1065',
           deeper: '#1a0a3a',
           darkest: '#0f051d',