diff --git a/admin-compliance/app/sdk/architecture/page.tsx b/admin-compliance/app/sdk/architecture/page.tsx
index 220e583..c546528 100644
--- a/admin-compliance/app/sdk/architecture/page.tsx
+++ b/admin-compliance/app/sdk/architecture/page.tsx
@@ -236,6 +236,16 @@ export default function ArchitecturePage() {
   const [showDb, setShowDb] = useState(false)
   const [showRag, setShowRag] = useState(false)
   const [showApis, setShowApis] = useState(false)
+  const [expandedServices, setExpandedServices] = useState<Set<string>>(new Set())
+
+  const toggleExpanded = useCallback((id: string) => {
+    setExpandedServices(prev => {
+      const next = new Set(prev)
+      if (next.has(id)) next.delete(id)
+      else next.add(id)
+      return next
+    })
+  }, [])
 
   const allDbTables = useMemo(() => getAllDbTables(), [])
   const allRagCollections = useMemo(() => getAllRagCollections(), [])
@@ -708,7 +718,7 @@ export default function ArchitecturePage() {
         )}
       </div>
 
-      {/* Service Table */}
+      {/* Service Table (aufklappbar) */}
       <div className="bg-white rounded-xl border border-slate-200 shadow-sm overflow-hidden">
         <div className="px-4 py-3 bg-slate-50 border-b">
           <h3 className="font-medium text-slate-700">
@@ -719,60 +729,214 @@ export default function ArchitecturePage() {
             })
           </h3>
         </div>
-        <div className="divide-y max-h-96 overflow-y-auto">
+        <div className="divide-y max-h-[600px] overflow-y-auto">
           {ARCH_SERVICES.filter(
             s => layerFilter === 'alle' || s.layer === layerFilter
           ).map(service => {
             const layer = LAYERS[service.layer]
+            const isExpanded = expandedServices.has(service.id)
+
             return (
-              <button
-                key={service.id}
-                onClick={() => setSelectedService(service)}
-                className={`w-full flex items-center gap-3 p-3 text-left transition-colors ${
-                  selectedService?.id === service.id
-                    ? 'bg-purple-50'
-                    : 'hover:bg-slate-50'
-                }`}
-              >
-                <span
-                  className="w-8 h-8 rounded-lg flex items-center justify-center text-[10px] font-bold shrink-0"
-                  style={{ background: layer.colorBg, color: layer.colorText }}
+              <div key={service.id}>
+                {/* Row Header */}
+                <button
+                  onClick={() => toggleExpanded(service.id)}
+                  className={`w-full flex items-center gap-3 p-3 text-left transition-colors ${
+                    isExpanded
+                      ? 'bg-purple-50'
+                      : 'hover:bg-slate-50'
+                  }`}
                 >
-                  {service.port ? `:${service.port}` : '--'}
-                </span>
-                <div className="flex-1 min-w-0">
-                  <div className="font-medium text-slate-800 text-sm">
-                    {service.name}
+                  {/* Chevron */}
+                  <svg
+                    className={`w-4 h-4 text-slate-400 shrink-0 transition-transform duration-200 ${
+                      isExpanded ? 'rotate-90' : ''
+                    }`}
+                    fill="none" stroke="currentColor" viewBox="0 0 24 24"
+                  >
+                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 5l7 7-7 7" />
+                  </svg>
+                  <span
+                    className="w-8 h-8 rounded-lg flex items-center justify-center text-[10px] font-bold shrink-0"
+                    style={{ background: layer.colorBg, color: layer.colorText }}
+                  >
+                    {service.port ? `:${service.port}` : '--'}
+                  </span>
+                  <div className="flex-1 min-w-0">
+                    <div className="font-medium text-slate-800 text-sm">
+                      {service.name}
+                    </div>
+                    <div className="text-xs text-slate-500 flex items-center gap-2 mt-0.5">
+                      <span className="text-slate-400">{service.tech}</span>
+                      {service.dbTables.length > 0 && (
+                        <span className="text-slate-400">
+                          DB: {service.dbTables.length}
+                        </span>
+                      )}
+                      {service.ragCollections.length > 0 && (
+                        <span className="text-green-600">
+                          RAG: {service.ragCollections.length}
+                        </span>
+                      )}
+                      {service.apiEndpoints.length > 0 && (
+                        <span className="text-violet-600">
+                          API: {service.apiEndpoints.length}
+                        </span>
+                      )}
+                    </div>
                   </div>
-                  <div className="text-xs text-slate-500 flex items-center gap-2 mt-0.5">
-                    <span className="text-slate-400">{service.tech}</span>
-                    {service.dbTables.length > 0 && (
-                      <span className="text-slate-400">
-                        DB: {service.dbTables.length}
-                      </span>
-                    )}
-                    {service.ragCollections.length > 0 && (
-                      <span className="text-green-600">
-                        RAG: {service.ragCollections.length}
-                      </span>
-                    )}
-                    {service.apiEndpoints.length > 0 && (
-                      <span className="text-violet-600">
-                        API: {service.apiEndpoints.length}
-                      </span>
-                    )}
+                  <code className="text-[10px] text-slate-400 shrink-0 hidden sm:block">
+                    {service.container}
+                  </code>
+                  <span
+                    className="px-2 py-0.5 rounded text-[10px] font-medium shrink-0"
+                    style={{ background: layer.colorBg, color: layer.colorText }}
+                  >
+                    {layer.name}
+                  </span>
+                </button>
+
+                {/* Expanded Detail */}
+                {isExpanded && (
+                  <div className="px-4 pb-4 pt-1 bg-slate-50/50 border-t border-slate-100">
+                    {/* Beschreibung */}
+                    <p className="text-sm text-slate-700 leading-relaxed mb-3">
+                      {service.description}
+                    </p>
+
+                    {/* Info Grid */}
+                    <div className="grid grid-cols-2 sm:grid-cols-4 gap-3 mb-3">
+                      <div className="bg-white rounded-lg border border-slate-200 p-2.5">
+                        <div className="text-[10px] font-semibold text-slate-400 uppercase">Tech</div>
+                        <div className="text-sm font-medium text-slate-800 mt-0.5">{service.tech}</div>
+                      </div>
+                      <div className="bg-white rounded-lg border border-slate-200 p-2.5">
+                        <div className="text-[10px] font-semibold text-slate-400 uppercase">Port</div>
+                        <div className="text-sm font-medium text-slate-800 mt-0.5">
+                          {service.port ? `:${service.port}` : 'Intern'}
+                        </div>
+                      </div>
+                      <div className="bg-white rounded-lg border border-slate-200 p-2.5">
+                        <div className="text-[10px] font-semibold text-slate-400 uppercase">Container</div>
+                        <div className="text-xs font-mono text-slate-700 mt-0.5 truncate">{service.container}</div>
+                      </div>
+                      {service.url && (
+                        <div className="bg-white rounded-lg border border-slate-200 p-2.5">
+                          <div className="text-[10px] font-semibold text-slate-400 uppercase">URL</div>
+                          <a
+                            href={service.url}
+                            target="_blank"
+                            rel="noopener noreferrer"
+                            className="text-xs text-blue-600 hover:underline mt-0.5 block truncate"
+                          >
+                            {service.url}
+                          </a>
+                        </div>
+                      )}
+                    </div>
+
+                    {/* Sections */}
+                    <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-3">
+                      {/* DB Tables */}
+                      {service.dbTables.length > 0 && (
+                        <div className="bg-white rounded-lg border border-slate-200 p-3">
+                          <h4 className="text-[10px] font-semibold text-slate-500 uppercase mb-2">
+                            DB-Tabellen ({service.dbTables.length})
+                          </h4>
+                          <div className="space-y-1 max-h-40 overflow-y-auto">
+                            {service.dbTables.map(table => (
+                              <div key={table} className="bg-slate-50 rounded px-2 py-1">
+                                <code className="text-xs text-slate-700">{table}</code>
+                              </div>
+                            ))}
+                          </div>
+                        </div>
+                      )}
+
+                      {/* RAG Collections */}
+                      {service.ragCollections.length > 0 && (
+                        <div className="bg-white rounded-lg border border-slate-200 p-3">
+                          <h4 className="text-[10px] font-semibold text-slate-500 uppercase mb-2">
+                            RAG-Collections ({service.ragCollections.length})
+                          </h4>
+                          <div className="space-y-1">
+                            {service.ragCollections.map(rag => (
+                              <div key={rag} className="bg-green-50 rounded px-2 py-1">
+                                <code className="text-xs text-green-700">{rag}</code>
+                              </div>
+                            ))}
+                          </div>
+                        </div>
+                      )}
+
+                      {/* API Endpoints */}
+                      {service.apiEndpoints.length > 0 && (
+                        <div className="bg-white rounded-lg border border-slate-200 p-3">
+                          <h4 className="text-[10px] font-semibold text-slate-500 uppercase mb-2">
+                            API-Endpunkte ({service.apiEndpoints.length})
+                          </h4>
+                          <div className="space-y-1 max-h-40 overflow-y-auto">
+                            {service.apiEndpoints.map(ep => (
+                              <div key={ep} className="bg-violet-50 rounded px-2 py-1">
+                                <code className="text-xs text-violet-700">{ep}</code>
+                              </div>
+                            ))}
+                          </div>
+                        </div>
+                      )}
+
+                      {/* Dependencies */}
+                      {service.dependsOn.length > 0 && (
+                        <div className="bg-white rounded-lg border border-slate-200 p-3">
+                          <h4 className="text-[10px] font-semibold text-slate-500 uppercase mb-2">
+                            Abhaengigkeiten ({service.dependsOn.length})
+                          </h4>
+                          <div className="space-y-1">
+                            {service.dependsOn.map(depId => {
+                              const dep = ARCH_SERVICES.find(s => s.id === depId)
+                              const depLayer = dep ? LAYERS[dep.layer] : null
+                              return (
+                                <div key={depId} className="flex items-center gap-2 bg-slate-50 rounded px-2 py-1">
+                                  {depLayer && (
+                                    <span
+                                      className="w-2 h-2 rounded-full shrink-0"
+                                      style={{ background: depLayer.colorBorder }}
+                                    />
+                                  )}
+                                  <span className="text-xs text-slate-700">{dep?.name || depId}</span>
+                                </div>
+                              )
+                            })}
+                          </div>
+                        </div>
+                      )}
+                    </div>
+
+                    {/* Open in Graph + URL */}
+                    <div className="flex items-center gap-2 mt-3">
+                      <button
+                        onClick={() => {
+                          setSelectedService(service)
+                          window.scrollTo({ top: 0, behavior: 'smooth' })
+                        }}
+                        className="px-3 py-1.5 bg-slate-100 text-slate-700 rounded-lg text-xs font-medium hover:bg-slate-200 transition-colors"
+                      >
+                        Im Graph markieren
+                      </button>
+                      {service.url && (
+                        <a
+                          href={service.url}
+                          target="_blank"
+                          rel="noopener noreferrer"
+                          className="px-3 py-1.5 bg-purple-600 text-white rounded-lg text-xs font-medium hover:bg-purple-700 transition-colors"
+                        >
+                          Service oeffnen
+                        </a>
+                      )}
+                    </div>
                   </div>
-                </div>
-                <code className="text-[10px] text-slate-400 shrink-0 hidden sm:block">
-                  {service.container}
-                </code>
-                <span
-                  className="px-2 py-0.5 rounded text-[10px] font-medium shrink-0"
-                  style={{ background: layer.colorBg, color: layer.colorText }}
-                >
-                  {layer.name}
-                </span>
-              </button>
+                )}
+              </div>
             )
           })}
         </div>