Add ProductCard and ProductGrid components for mobile-optimized product listings

- Introduced ProductCard component to display individual product details, including image, title, description, price, and optional badges.
- Added ProductGrid component to create a flexible grid layout for displaying multiple ProductCard components, supporting 1-4 columns.
- Created a demo page to showcase the ProductCard and ProductGrid components in action, highlighting their responsive design and features.
- Updated styleguide to include links and descriptions for the new components.

app/components/Product/ProductCard.vue

@@ -0,0 +1,125 @@
+<script setup lang="ts">
+import { cn } from '~/lib/utils'
+
+interface Props {
+  /**
+   * Product image URL
+   */
+  image: string
+  /**
+   * Product name (e.g., "Makerspace Jahreskarte")
+   */
+  title: string
+  /**
+   * Short product description
+   */
+  description?: string
+  /**
+   * Price in EUR (will be formatted)
+   */
+  price: number
+  /**
+   * Optional badge text (e.g., "Beliebt", "Neu")
+   */
+  badge?: string
+  /**
+   * Optional discount percentage
+   */
+  discountPercentage?: number
+  /**
+   * Product ID for navigation
+   */
+  productId?: string
+  /**
+   * Additional CSS classes
+   */
+  class?: string
+}
+
+const props = defineProps<Props>()
+
+// Format price in EUR
+const formattedPrice = computed(() => {
+  return new Intl.NumberFormat('de-DE', {
+    style: 'currency',
+    currency: 'EUR',
+  }).format(props.price)
+})
+</script>
+
+<template>
+  <div
+    :class="
+      cn(
+        'group relative flex flex-col overflow-hidden rounded-2xl bg-white/10 backdrop-blur-lg border border-white/20 shadow-glass transition-all duration-300 hover:scale-[1.02] hover:shadow-2xl hover:border-white/30',
+        props.class,
+      )
+    "
+  >
+    <!-- Badge (optional) -->
+    <div
+      v-if="badge"
+      class="absolute left-4 top-4 z-10 rounded-full bg-experimenta-primary px-3 py-1 text-xs font-bold uppercase tracking-wider text-white shadow-lg"
+    >
+      {{ badge }}
+    </div>
+
+    <!-- Discount Badge (optional) -->
+    <div
+      v-if="discountPercentage"
+      class="absolute right-4 top-4 z-10 flex h-12 w-12 items-center justify-center rounded-full bg-red text-white shadow-lg"
+    >
+      <span class="text-xs font-bold">-{{ discountPercentage }}%</span>
+    </div>
+
+    <!-- Product Image -->
+    <div class="relative aspect-[16/9] w-full overflow-hidden bg-purple-dark">
+      <img
+        :src="image"
+        :alt="title"
+        class="h-full w-full object-cover transition-transform duration-500 group-hover:scale-110"
+      />
+      <!-- Gradient overlay for better text readability -->
+      <div
+        class="absolute inset-0 bg-gradient-to-t from-purple-darkest/80 via-transparent to-transparent"
+      />
+    </div>
+
+    <!-- Card Content -->
+    <div class="flex flex-1 flex-col space-y-3 p-5">
+      <!-- Title -->
+      <h3
+        class="text-xl font-bold leading-tight text-white transition-colors group-hover:text-experimenta-accent"
+      >
+        {{ title }}
+      </h3>
+
+      <!-- Description -->
+      <p v-if="description" class="flex-1 text-sm leading-relaxed text-white/80">
+        {{ description }}
+      </p>
+
+      <!-- Price & CTA -->
+      <div class="flex items-center justify-between gap-3 pt-2">
+        <!-- Price -->
+        <div class="flex flex-col">
+          <span class="text-xs uppercase tracking-wide text-white/60">Preis</span>
+          <span class="text-2xl font-bold text-experimenta-accent">
+            {{ formattedPrice }}
+          </span>
+        </div>
+
+        <!-- CTA Button -->
+        <NuxtLink
+          :to="productId ? `/produkte/${productId}` : '#'"
+          class="group/btn relative overflow-hidden rounded-xl bg-gradient-button bg-size-300 bg-left px-6 py-3 font-bold text-white shadow-lg transition-all duration-300 hover:bg-right hover:shadow-2xl active:scale-95"
+        >
+          <span class="relative z-10">Details</span>
+          <div
+            class="absolute inset-0 bg-gradient-to-r from-transparent via-white/20 to-transparent opacity-0 transition-opacity duration-300 group-hover/btn:opacity-100"
+          />
+        </NuxtLink>
+      </div>
+    </div>
+  </div>
+</template>

app/components/Product/ProductGrid.vue

@@ -0,0 +1,66 @@
+<script setup lang="ts">
+import { cn } from '~/lib/utils'
+
+interface Props {
+  /**
+   * Grid title (e.g., "Unsere Jahreskarten")
+   */
+  title?: string
+  /**
+   * Grid description/subtitle
+   */
+  description?: string
+  /**
+   * Number of columns on desktop (default: 3)
+   */
+  columns?: 1 | 2 | 3 | 4
+  /**
+   * Additional CSS classes
+   */
+  class?: string
+}
+
+const props = withDefaults(defineProps<Props>(), {
+  columns: 3,
+})
+
+// Generate grid column classes
+const gridClass = computed(() => {
+  const colMap = {
+    1: 'md:grid-cols-1',
+    2: 'md:grid-cols-2',
+    3: 'md:grid-cols-3',
+    4: 'md:grid-cols-4',
+  }
+  return colMap[props.columns]
+})
+</script>
+
+<template>
+  <section :class="cn('w-full', props.class)">
+    <!-- Section Header -->
+    <div v-if="title || description" class="mb-8 text-center">
+      <h2
+        v-if="title"
+        class="mb-3 text-3xl font-bold text-white md:text-4xl"
+      >
+        {{ title }}
+      </h2>
+      <p v-if="description" class="mx-auto max-w-2xl text-base text-white/80 md:text-lg">
+        {{ description }}
+      </p>
+    </div>
+
+    <!-- Product Grid -->
+    <div
+      :class="
+        cn(
+          'grid grid-cols-1 gap-6 sm:grid-cols-2',
+          gridClass,
+        )
+      "
+    >
+      <slot />
+    </div>
+  </section>
+</template>

app/pages/internal/products-demo.vue

@@ -0,0 +1,191 @@
+<script setup lang="ts">
+// Demo page to showcase product cards
+
+definePageMeta({
+  layout: 'styleguide',
+})
+
+// Sample product data
+const products = [
+  {
+    id: 'makerspace-jk-2025',
+    image: '/img/makerspace-jk-2025.jpg',
+    title: 'Makerspace Jahreskarte',
+    description:
+      'Unbegrenzter Zugang zum Makerspace für 365 Tage. Nutze modernste Werkzeuge, 3D-Drucker und vieles mehr.',
+    price: 120.0,
+    badge: 'Beliebt',
+  },
+  {
+    id: 'experimenta-jk-2025',
+    image: '/img/makerspace-jk-2025.jpg', // Using same image as placeholder
+    title: 'experimenta Jahreskarte',
+    description:
+      'Erlebe die Ausstellungswelt der experimenta ein ganzes Jahr lang. Mit freiem Eintritt zu allen Ausstellungen.',
+    price: 85.0,
+  },
+  {
+    id: 'paedagogen-jk-2025',
+    image: '/img/makerspace-jk-2025.jpg', // Using same image as placeholder
+    title: 'Pädagogen Jahreskarte',
+    description:
+      'Speziell für Lehrkräfte und Pädagogen. Mit exklusiven Fortbildungsangeboten und Materialien.',
+    price: 60.0,
+    badge: 'Neu',
+    discountPercentage: 15,
+  },
+]
+</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">
+        Produktkarten Demo
+      </h1>
+      <p class="mx-auto max-w-2xl text-lg text-white/80">
+        Mobile-optimierte Produktkarten für Jahreskarten und andere Produkte der experimenta.
+      </p>
+    </div>
+
+    <!-- Product Grid Section -->
+    <div class="mx-auto max-w-container-wide">
+      <ProductGrid
+        title="Unsere Jahreskarten"
+        description="Wähle die passende Jahreskarte für deine Bedürfnisse. Alle Karten sind 365 Tage gültig und sofort einsetzbar."
+        :columns="3"
+      >
+        <ProductCard
+          v-for="product in products"
+          :key="product.id"
+          :image="product.image"
+          :title="product.title"
+          :description="product.description"
+          :price="product.price"
+          :badge="product.badge"
+          :discount-percentage="product.discountPercentage"
+          :product-id="product.id"
+        />
+      </ProductGrid>
+    </div>
+
+    <!-- Design Variants Section -->
+    <div class="mx-auto mt-20 max-w-container-wide">
+      <h2 class="mb-8 text-center text-3xl font-bold text-white">
+        Design-Varianten
+      </h2>
+
+      <!-- Single Column Layout -->
+      <div class="mb-12">
+        <h3 class="mb-4 text-xl font-bold text-white">Single Column (Mobile)</h3>
+        <ProductGrid :columns="1">
+          <ProductCard
+            :image="products[0].image"
+            :title="products[0].title"
+            :description="products[0].description"
+            :price="products[0].price"
+            :badge="products[0].badge"
+            :product-id="products[0].id"
+          />
+        </ProductGrid>
+      </div>
+
+      <!-- Two Column Layout -->
+      <div class="mb-12">
+        <h3 class="mb-4 text-xl font-bold text-white">Two Columns</h3>
+        <ProductGrid :columns="2">
+          <ProductCard
+            v-for="product in products.slice(0, 2)"
+            :key="product.id"
+            :image="product.image"
+            :title="product.title"
+            :description="product.description"
+            :price="product.price"
+            :badge="product.badge"
+            :product-id="product.id"
+          />
+        </ProductGrid>
+      </div>
+
+      <!-- Four Column Layout (Desktop only) -->
+      <div class="mb-12">
+        <h3 class="mb-4 text-xl font-bold text-white">
+          Four Columns (Desktop - shows 2 cols on mobile)
+        </h3>
+        <ProductGrid :columns="4">
+          <ProductCard
+            v-for="product in [...products, products[0]]"
+            :key="product.id + '-4col'"
+            :image="product.image"
+            :title="product.title"
+            :price="product.price"
+            :product-id="product.id"
+          />
+        </ProductGrid>
+      </div>
+    </div>
+
+    <!-- Component 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">
+          Component 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>Mobile-First:</strong> Optimiert für Smartphones, skaliert perfekt auf Desktop</span>
+          </li>
+          <li class="flex items-start gap-2">
+            <span class="mt-1 text-experimenta-accent">✓</span>
+            <span><strong>Responsive Images:</strong> 16:9 Aspect Ratio mit Zoom-Effekt beim Hover</span>
+          </li>
+          <li class="flex items-start gap-2">
+            <span class="mt-1 text-experimenta-accent">✓</span>
+            <span><strong>Optional Badges:</strong> "Beliebt", "Neu", oder eigene Texte</span>
+          </li>
+          <li class="flex items-start gap-2">
+            <span class="mt-1 text-experimenta-accent">✓</span>
+            <span><strong>Discount Badge:</strong> Prozentuale Rabatte hervorheben</span>
+          </li>
+          <li class="flex items-start gap-2">
+            <span class="mt-1 text-experimenta-accent">✓</span>
+            <span><strong>Gradient Button:</strong> Animierter Gradient beim Hover</span>
+          </li>
+          <li class="flex items-start gap-2">
+            <span class="mt-1 text-experimenta-accent">✓</span>
+            <span><strong>Glassmorphism Design:</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>Flexible Grid:</strong> 1-4 Spalten auf Desktop, automatisch responsive</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">
+          Usage Example
+        </h2>
+        <pre class="overflow-x-auto rounded-lg bg-purple-darkest p-4 text-sm text-white/90"><code>&lt;ProductGrid
+  title="Unsere Jahreskarten"
+  description="Wähle die passende Karte"
+  :columns="3"
+&gt;
+  &lt;ProductCard
+    image="/img/makerspace-jk-2025.jpg"
+    title="Makerspace Jahreskarte"
+    description="Unbegrenzter Zugang..."
+    :price="120.00"
+    badge="Beliebt"
+    product-id="makerspace-jk-2025"
+  /&gt;
+&lt;/ProductGrid&gt;</code></pre>
+      </div>
+    </div>
+  </div>
+</template>

app/pages/internal/styleguide.vue

@@ -55,6 +55,7 @@ const copyCode = async (code: string) => {
           <li><a href="#status" class="link-primary">Status Messages</a></li>
           <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>
         </ul>
       </nav>
 
@@ -655,18 +656,34 @@ const copyCode = async (code: string) => {
       <section id="components" class="mb-16">
         <h2 class="text-4xl font-bold mb-6 text-experimenta-accent">Components</h2>
 
-        <div class="card-info card-accent-border">
+        <div class="card-info card-accent-border mb-8">
           <h3 class="text-xl font-semibold mb-2 text-experimenta-accent">Available Components</h3>
           <ul class="list-disc list-inside space-y-2 text-white/90">
             <li><strong>CommonHeader</strong> - Main navigation header with experimenta logo</li>
             <li><strong>CommonFooter</strong> - Footer with 4-column grid (links, contact, legal, social)</li>
             <li><strong>Button</strong> - shadcn-nuxt Button component with 7 variants</li>
+            <li><strong>ProductCard</strong> - Mobile-optimized product card with image, badges, and CTA</li>
+            <li><strong>ProductGrid</strong> - Flexible grid layout for product listings (1-4 columns)</li>
           </ul>
           <p class="mt-4 text-sm text-white/70">
             See individual component files in <code
               class="font-mono bg-white/10 px-2 py-1 rounded">/app/components/</code>
           </p>
         </div>
+
+        <!-- Product Cards Demo Link -->
+        <div class="card-glass">
+          <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.
+            Mobile-First Design mit Glassmorphism-Effekten, optionalen Badges und animierten Hover-Effekten.
+          </p>
+          <div class="flex gap-4">
+            <NuxtLink to="/internal/products-demo" class="btn-experimenta">
+              Zur Product Cards Demo →
+            </NuxtLink>
+          </div>
+        </div>
       </section>
 
       <!-- Footer -->