feat(referenzen): implement smart metric cards and typography improvements

app/[locale]/referenzen/page.tsx

@@ -85,9 +85,11 @@ export default async function ReferenzenOverview(props: { params: Promise<{ loca
       <Container className="relative z-20 mt-16 md:mt-24">
         <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6 md:gap-8">
           {references.map((ref) => (
-            <div
+            <TrackedLink
               key={ref.slug}
-              className="group flex flex-col bg-white border border-neutral-100 rounded-3xl overflow-hidden shadow-sm hover:shadow-2xl transition-all duration-300 transform hover:-translate-y-1 cursor-default"
+              href={`/${locale}/referenzen/${ref.slug}`}
+              eventProperties={{ location: 'reference_list_card', slug: ref.slug }}
+              className="group flex flex-col bg-white border border-neutral-100 rounded-3xl overflow-hidden shadow-sm hover:shadow-2xl transition-all duration-300 transform hover:-translate-y-1 cursor-pointer block"
             >
               <div className="flex flex-col h-full relative">
                 {/* Image Section */}
@@ -117,7 +119,7 @@ export default async function ReferenzenOverview(props: { params: Promise<{ loca
 
                 {/* Content Section */}
                 <div className="flex flex-col flex-grow p-6 md:p-8 bg-white">
-                  <h3 className="text-xl md:text-2xl font-bold font-heading text-neutral-dark mb-6 transition-colors line-clamp-3 leading-[1.2]">
+                  <h3 className="text-xl md:text-2xl font-bold font-heading text-neutral-dark mb-6 transition-colors line-clamp-3 leading-[1.2] group-hover:text-primary">
                     {ref.frontmatter.title}
                   </h3>
                   
@@ -140,7 +142,7 @@ export default async function ReferenzenOverview(props: { params: Promise<{ loca
                   </div>
                 </div>
               </div>
-            </div>
+            </TrackedLink>
           ))}
         </div>