diff --git a/app/app.vue b/app/app.vue
index e29ccb5..f66156c 100644
--- a/app/app.vue
+++ b/app/app.vue
@@ -9,9 +9,7 @@
 // 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'
-
-// Import cart UI components
-const { isMobile } = useCartUI()
+import CartResponsive from '~/components/Cart/CartResponsive.vue'
 </script>
 
 <template>
@@ -19,10 +17,8 @@ const { isMobile } = useCartUI()
     <div>
       <NuxtPage />
 
-      <!-- Cart UI: Render appropriate component based on screen size -->
-      <!-- Mobile: Bottom sheet, Desktop: Right sidebar -->
-      <CartSheet v-if="isMobile" />
-      <CartSidebar v-else />
+      <!-- Responsive Cart: Slides from right on desktop, bottom on mobile -->
+      <CartResponsive />
     </div>
   </ConfigProvider>
 </template>
diff --git a/app/components/Cart/CartSidebar.vue b/app/components/Cart/CartResponsive.vue
similarity index 80%
rename from app/components/Cart/CartSidebar.vue
rename to app/components/Cart/CartResponsive.vue
index 2d28fea..cecc168 100644
--- a/app/components/Cart/CartSidebar.vue
+++ b/app/components/Cart/CartResponsive.vue
@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import { useMediaQuery } from '@vueuse/core'
 import {
   Sheet,
   SheetContent,
@@ -14,6 +15,17 @@ import CartSummary from './CartSummary.vue'
 const { items, itemCount, total, loading, updateItem, removeItem } = useCart()
 const { isOpen, close } = useCartUI()
 
+// Detect mobile viewport (< 640px = Tailwind sm breakpoint)
+const isMobile = useMediaQuery('(max-width: 639px)')
+
+// Responsive side prop: bottom for mobile, right for desktop
+const side = computed(() => isMobile.value ? 'bottom' : 'right')
+
+// Responsive sizing classes
+const sizeClasses = computed(() =>
+  isMobile.value ? 'h-[90vh]' : 'w-full sm:w-[400px]'
+)
+
 // Handle quantity update
 async function handleUpdateQuantity(itemId: string, quantity: number) {
   await updateItem(itemId, quantity)
@@ -33,7 +45,7 @@ function handleCheckout() {
 
 <template>
   <Sheet :open="isOpen" @update:open="(open) => !open && close()">
-    <SheetContent side="right" class="w-full sm:w-[400px] p-0 flex flex-col">
+    <SheetContent :side="side" :class="[sizeClasses, 'p-0 flex flex-col']">
       <!-- Header -->
       <SheetHeader class="px-6 py-4 border-b">
         <SheetTitle class="text-xl font-bold">
diff --git a/app/components/Cart/CartSheet.vue b/app/components/Cart/CartSheet.vue
deleted file mode 100644
index 4951f2e..0000000
--- a/app/components/Cart/CartSheet.vue
+++ /dev/null
@@ -1,66 +0,0 @@
-<script setup lang="ts">
-import {
-  Sheet,
-  SheetContent,
-  SheetHeader,
-  SheetTitle,
-} from '@/components/ui/sheet'
-import { ScrollArea } from '@/components/ui/scroll-area'
-import CartEmpty from './CartEmpty.vue'
-import CartItem from './CartItem.vue'
-import CartSummary from './CartSummary.vue'
-
-// Get cart state and UI controls
-const { items, itemCount, total, loading, updateItem, removeItem } = useCart()
-const { isOpen, close } = useCartUI()
-
-// Handle quantity update
-async function handleUpdateQuantity(itemId: string, quantity: number) {
-  await updateItem(itemId, quantity)
-}
-
-// Handle item removal
-async function handleRemoveItem(itemId: string) {
-  await removeItem(itemId)
-}
-
-// Navigate to checkout
-function handleCheckout() {
-  close()
-  navigateTo('/checkout')
-}
-</script>
-
-<template>
-  <Sheet :open="isOpen" @update:open="(open) => !open && close()">
-    <SheetContent side="bottom" class="h-[90vh] p-0 flex flex-col">
-      <!-- Header -->
-      <SheetHeader class="px-6 py-4 border-b">
-        <SheetTitle class="text-xl font-bold">
-          Warenkorb ({{ itemCount }})
-        </SheetTitle>
-      </SheetHeader>
-
-      <!-- Empty State -->
-      <div v-if="itemCount === 0" class="flex-1 flex items-center justify-center px-6">
-        <CartEmpty />
-      </div>
-
-      <!-- Cart Items + Summary -->
-      <template v-else>
-        <!-- Scrollable Items List -->
-        <ScrollArea class="flex-1 px-6">
-          <div class="space-y-4 py-4">
-            <CartItem v-for="item in items" :key="item.id" :item="item" :loading="loading"
-              @update:quantity="(qty) => handleUpdateQuantity(item.id, qty)" @remove="handleRemoveItem(item.id)" />
-          </div>
-        </ScrollArea>
-
-        <!-- Sticky Footer with Summary -->
-        <div class="border-t px-6 py-4 bg-background">
-          <CartSummary :items="items" :total="total" :loading="loading" @checkout="handleCheckout" />
-        </div>
-      </template>
-    </SheetContent>
-  </Sheet>
-</template>
diff --git a/app/components/Cart/index.ts b/app/components/Cart/index.ts
index f5bb864..05bbf8a 100644
--- a/app/components/Cart/index.ts
+++ b/app/components/Cart/index.ts
@@ -2,5 +2,4 @@ export { default as CartItem } from './CartItem.vue'
 export { default as CartSummary } from './CartSummary.vue'
 export { default as CartEmpty } from './CartEmpty.vue'
 export { default as CartFAB } from './CartFAB.vue'
-export { default as CartSidebar } from './CartSidebar.vue'
-export { default as CartSheet } from './CartSheet.vue'
+export { default as CartResponsive } from './CartResponsive.vue'
diff --git a/app/layouts/default.vue b/app/layouts/default.vue
index 007cf53..e4f524f 100644
--- a/app/layouts/default.vue
+++ b/app/layouts/default.vue
@@ -2,12 +2,8 @@
 import AppHeader from '~/components/navigation/AppHeader.vue'
 import BottomNav from '~/components/navigation/BottomNav.vue'
 import CartFAB from '~/components/Cart/CartFAB.vue'
-import CartSidebar from '~/components/Cart/CartSidebar.vue'
-import CartSheet from '~/components/Cart/CartSheet.vue'
+import CartResponsive from '~/components/Cart/CartResponsive.vue'
 import { Toaster } from '~/components/ui/sonner'
-
-// Determine which cart UI to show based on screen size
-const { isMobile } = useCartUI()
 </script>
 
 <template>
@@ -29,11 +25,8 @@ const { isMobile } = useCartUI()
     <!-- Floating Action Button (FAB) for Cart on Product Pages -->
     <CartFAB />
 
-    <!-- Cart Sidebar (Desktop: >= 1024px) -->
-    <CartSidebar v-if="!isMobile" />
-
-    <!-- Cart Sheet (Mobile: < 1024px) -->
-    <CartSheet v-if="isMobile" />
+    <!-- Responsive Cart (slides from right on desktop, bottom on mobile) -->
+    <CartResponsive />
 
     <!-- Toast Notifications -->
     <Toaster position="top-center" :duration="3000" rich-colors />
diff --git a/assets/css/tailwind.css b/assets/css/tailwind.css
index 6ac8162..56c9135 100644
--- a/assets/css/tailwind.css
+++ b/assets/css/tailwind.css
@@ -836,6 +836,170 @@
    ======================================== */
 
 @layer utilities {
+  /* Animation utilities for Sheet/Dialog components */
+  @keyframes slideInFromRight {
+    from {
+      transform: translateX(100%);
+    }
+    to {
+      transform: translateX(0);
+    }
+  }
+
+  @keyframes slideOutToRight {
+    from {
+      transform: translateX(0);
+    }
+    to {
+      transform: translateX(100%);
+    }
+  }
+
+  @keyframes slideInFromBottom {
+    from {
+      transform: translateY(100%);
+    }
+    to {
+      transform: translateY(0);
+    }
+  }
+
+  @keyframes slideOutToBottom {
+    from {
+      transform: translateY(0);
+    }
+    to {
+      transform: translateY(100%);
+    }
+  }
+
+  @keyframes slideInFromLeft {
+    from {
+      transform: translateX(-100%);
+    }
+    to {
+      transform: translateX(0);
+    }
+  }
+
+  @keyframes slideOutToLeft {
+    from {
+      transform: translateX(0);
+    }
+    to {
+      transform: translateX(-100%);
+    }
+  }
+
+  @keyframes slideInFromTop {
+    from {
+      transform: translateY(-100%);
+    }
+    to {
+      transform: translateY(0);
+    }
+  }
+
+  @keyframes slideOutToTop {
+    from {
+      transform: translateY(0);
+    }
+    to {
+      transform: translateY(-100%);
+    }
+  }
+
+  @keyframes fadeIn {
+    from {
+      opacity: 0;
+    }
+    to {
+      opacity: 1;
+    }
+  }
+
+  @keyframes fadeOut {
+    from {
+      opacity: 1;
+    }
+    to {
+      opacity: 0;
+    }
+  }
+
+  /* Animation classes with data-state support */
+  [data-state="open"].animate-in,
+  .data-\[state\=open\]\:animate-in[data-state="open"] {
+    animation-duration: 0.3s;
+    animation-fill-mode: both;
+  }
+
+  [data-state="closed"].animate-out,
+  .data-\[state\=closed\]\:animate-out[data-state="closed"] {
+    animation-duration: 0.2s;
+    animation-fill-mode: both;
+  }
+
+  [data-state="open"].fade-in-0,
+  .data-\[state\=open\]\:fade-in-0[data-state="open"] {
+    animation-name: fadeIn;
+  }
+
+  [data-state="closed"].fade-out-0,
+  .data-\[state\=closed\]\:fade-out-0[data-state="closed"] {
+    animation-name: fadeOut;
+  }
+
+  [data-state="open"].slide-in-from-right,
+  .data-\[state\=open\]\:slide-in-from-right[data-state="open"] {
+    animation-name: slideInFromRight;
+  }
+
+  [data-state="closed"].slide-out-to-right,
+  .data-\[state\=closed\]\:slide-out-to-right[data-state="closed"] {
+    animation-name: slideOutToRight;
+  }
+
+  [data-state="open"].slide-in-from-bottom,
+  .data-\[state\=open\]\:slide-in-from-bottom[data-state="open"] {
+    animation-name: slideInFromBottom;
+  }
+
+  [data-state="closed"].slide-out-to-bottom,
+  .data-\[state\=closed\]\:slide-out-to-bottom[data-state="closed"] {
+    animation-name: slideOutToBottom;
+  }
+
+  [data-state="open"].slide-in-from-left,
+  .data-\[state\=open\]\:slide-in-from-left[data-state="open"] {
+    animation-name: slideInFromLeft;
+  }
+
+  [data-state="closed"].slide-out-to-left,
+  .data-\[state\=closed\]\:slide-out-to-left[data-state="closed"] {
+    animation-name: slideOutToLeft;
+  }
+
+  [data-state="open"].slide-in-from-top,
+  .data-\[state\=open\]\:slide-in-from-top[data-state="open"] {
+    animation-name: slideInFromTop;
+  }
+
+  [data-state="closed"].slide-out-to-top,
+  .data-\[state\=closed\]\:slide-out-to-top[data-state="closed"] {
+    animation-name: slideOutToTop;
+  }
+
+  [data-state="open"].duration-500,
+  .data-\[state\=open\]\:duration-500[data-state="open"] {
+    animation-duration: 500ms;
+  }
+
+  [data-state="closed"].duration-300,
+  .data-\[state\=closed\]\:duration-300[data-state="closed"] {
+    animation-duration: 300ms;
+  }
+
   /* Container utilities */
   .container-main {
     @apply max-w-container-main mx-auto;