redesign ArchitectureSlide with metro/subway map theme

- Replace rectangular cards with circular station nodes on metro tracks
- Right-angle SVG paths only (no distortion with preserveAspectRatio=none)
- Animated data packet flows along tracks, bidirectional MCP arc
- LiteLLM hub enlarged (82px), centered mandants strip
- Vertical tier labels, BSI badges, junction corner dots
- Preserve all node data, detail panel, i18n, TokenTicker

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

pitch-deck/components/slides/ArchitectureSlide.tsx

@@ -12,9 +12,7 @@ import {
   Server, Network, ChevronRight, BadgeCheck,
 } from 'lucide-react'
 
-interface ArchitectureSlideProps {
-  lang: Language
-}
+interface ArchitectureSlideProps { lang: Language }
 
 type NodeId = 'certifai' | 'complai' | 'scanner' | 'litellm' | 'llm' | 'embeddings' | 'tools'
 type ConnType = 'api' | 'mcp' | 'embed' | 'tool'
@@ -29,8 +27,8 @@ interface NodeDef {
   twBorder: string
   twBg: string
   twDot: string
-  cx: number
-  cy: number
+  cx: number  // % of container width (aligns with SVG x/1100)
+  cy: number  // % of container height (aligns with SVG y/420)
   tier: 'product' | 'proxy' | 'inference'
   tech: string[]
   services: { name: string; desc: string }[]
@@ -41,30 +39,39 @@ interface ConnDef {
   from: NodeId
   to: NodeId
   type: ConnType
-  d: string
-  revD?: string  // reverse path for bidirectional MCP
+  d: string      // SVG path in viewBox "0 0 1100 420" — right-angle only
+  revD?: string
 }
 
+// All right-angle paths — safe with preserveAspectRatio="none" + vectorEffect="non-scaling-stroke"
 const CONNS: ConnDef[] = [
-  { from: 'certifai', to: 'litellm', type: 'api',   d: 'M 18 22 Q 28 43 50 52' },
-  { from: 'complai',  to: 'litellm', type: 'api',   d: 'M 50 22 L 50 52' },
-  { from: 'scanner',  to: 'litellm', type: 'api',   d: 'M 82 22 Q 72 43 50 52' },
-  { from: 'complai',  to: 'scanner', type: 'mcp',   d: 'M 50 22 Q 66 9 82 22', revD: 'M 82 22 Q 66 9 50 22' },
-  { from: 'litellm',  to: 'llm',        type: 'api',   d: 'M 50 52 Q 37 67 18 82' },
-  { from: 'litellm',  to: 'embeddings', type: 'embed', d: 'M 50 52 L 50 82' },
-  { from: 'litellm',  to: 'tools',      type: 'tool',  d: 'M 50 52 Q 63 67 82 82' },
+  { from: 'certifai', to: 'litellm', type: 'api',
+    d: 'M 195 105 L 195 158 L 522 158 L 522 210' },
+  { from: 'complai',  to: 'litellm', type: 'api',
+    d: 'M 550 105 L 550 210' },
+  { from: 'scanner',  to: 'litellm', type: 'api',
+    d: 'M 905 105 L 905 158 L 578 158 L 578 210' },
+  { from: 'complai',  to: 'scanner', type: 'mcp',
+    d: 'M 550 105 Q 727 52 905 105',
+    revD: 'M 905 105 Q 727 52 550 105' },
+  { from: 'litellm',  to: 'llm',        type: 'api',
+    d: 'M 550 210 L 550 268 L 218 268 L 218 340' },
+  { from: 'litellm',  to: 'embeddings', type: 'embed',
+    d: 'M 550 210 L 550 340' },
+  { from: 'litellm',  to: 'tools',      type: 'tool',
+    d: 'M 550 210 L 550 268 L 882 268 L 882 340' },
 ]
 
+// cx = svgX/1100*100, cy = svgY/420*100  (exact match between SVG coords and CSS %)
 function getNodes(de: boolean): NodeDef[] {
   return [
     {
-      id: 'certifai',
-      icon: Brain,
+      id: 'certifai', icon: Brain,
       title: 'CERTifAI',
       subtitle: de ? 'GenAI Mandantenportal' : 'GenAI Tenant Portal',
       color: '#c084fc', twColor: 'text-purple-400',
       twBorder: 'border-purple-500/50', twBg: 'bg-purple-500/10', twDot: 'bg-purple-400',
-      cx: 18, cy: 22, tier: 'product',
+      cx: 17.7, cy: 25, tier: 'product',
       badge: 'Rust · Dioxus',
       tech: ['Rust', 'Dioxus', 'MongoDB', 'Keycloak', 'SearXNG', 'LangGraph'],
       services: [
@@ -75,13 +82,12 @@ function getNodes(de: boolean): NodeDef[] {
       ],
     },
     {
-      id: 'complai',
-      icon: Shield,
+      id: 'complai', icon: Shield,
       title: 'COMPLAI',
       subtitle: de ? 'Compliance & Audit' : 'Compliance & Audit',
       color: '#818cf8', twColor: 'text-indigo-400',
       twBorder: 'border-indigo-500/50', twBg: 'bg-indigo-500/10', twDot: 'bg-indigo-400',
-      cx: 50, cy: 22, tier: 'product',
+      cx: 50, cy: 25, tier: 'product',
       badge: 'Next.js · FastAPI',
       tech: ['Next.js 15', 'FastAPI', 'Go/Gin', 'PostgreSQL', 'Qdrant', 'Valkey'],
       services: [
@@ -92,13 +98,12 @@ function getNodes(de: boolean): NodeDef[] {
       ],
     },
     {
-      id: 'scanner',
-      icon: ScanLine,
+      id: 'scanner', icon: ScanLine,
       title: 'Compliance Scanner',
       subtitle: de ? 'Code-Sicherheit' : 'Code Security',
       color: '#34d399', twColor: 'text-emerald-400',
       twBorder: 'border-emerald-500/50', twBg: 'bg-emerald-500/10', twDot: 'bg-emerald-400',
-      cx: 82, cy: 22, tier: 'product',
+      cx: 82.3, cy: 25, tier: 'product',
       badge: 'Rust · Axum',
       tech: ['Rust', 'Axum', 'MongoDB', 'Semgrep', 'Gitleaks', 'Syft'],
       services: [
@@ -109,13 +114,12 @@ function getNodes(de: boolean): NodeDef[] {
       ],
     },
     {
-      id: 'litellm',
-      icon: Zap,
+      id: 'litellm', icon: Zap,
       title: 'LiteLLM Proxy',
       subtitle: de ? 'KI-Gateway & Guardrails' : 'AI Gateway & Guardrails',
       color: '#fbbf24', twColor: 'text-amber-400',
       twBorder: 'border-amber-500/60', twBg: 'bg-amber-500/10', twDot: 'bg-amber-400',
-      cx: 50, cy: 52, tier: 'proxy',
+      cx: 50, cy: 50, tier: 'proxy',
       badge: 'Hub',
       tech: ['OpenAI-kompatible API', 'Bearer Auth', 'Rate Limiting', 'PII-Filter', 'Spend Tracking'],
       services: [
@@ -127,14 +131,13 @@ function getNodes(de: boolean): NodeDef[] {
       ],
     },
     {
-      id: 'llm',
-      icon: Cpu,
+      id: 'llm', icon: Cpu,
       title: de ? 'LLM Inferenz' : 'LLM Inference',
       subtitle: de ? 'Lokale Sprachmodelle' : 'Local Language Models',
       color: '#60a5fa', twColor: 'text-blue-400',
       twBorder: 'border-blue-500/50', twBg: 'bg-blue-500/10', twDot: 'bg-blue-400',
-      cx: 18, cy: 82, tier: 'inference',
-      badge: de ? 'On-Premise · BSI' : 'On-Premise · BSI',
+      cx: 17.7, cy: 81, tier: 'inference',
+      badge: 'On-Premise · BSI',
       tech: ['Qwen3-32B', 'Qwen3-Coder-30B', 'DeepSeek-R1-8B', 'Ollama'],
       services: [
         { name: de ? 'Vollständig lokal' : 'Fully local', desc: de ? 'Daten verlassen nie den Server' : 'Data never leaves the server' },
@@ -143,13 +146,12 @@ function getNodes(de: boolean): NodeDef[] {
       ],
     },
     {
-      id: 'embeddings',
-      icon: Layers,
+      id: 'embeddings', icon: Layers,
       title: 'Embeddings',
       subtitle: de ? 'Semantische Suche' : 'Semantic Search',
       color: '#a78bfa', twColor: 'text-violet-400',
       twBorder: 'border-violet-500/50', twBg: 'bg-violet-500/10', twDot: 'bg-violet-400',
-      cx: 50, cy: 82, tier: 'inference',
+      cx: 50, cy: 81, tier: 'inference',
       badge: de ? 'EU-Souverän' : 'EU Sovereign',
       tech: ['bge-m3', 'Qdrant Vector DB', 'Sentence-Transformers'],
       services: [
@@ -159,13 +161,12 @@ function getNodes(de: boolean): NodeDef[] {
       ],
     },
     {
-      id: 'tools',
-      icon: Wrench,
+      id: 'tools', icon: Wrench,
       title: de ? 'KI-Tools' : 'AI Tools',
       subtitle: de ? 'Web-Suche & MCP' : 'Web Search & MCP',
       color: '#2dd4bf', twColor: 'text-teal-400',
       twBorder: 'border-teal-500/50', twBg: 'bg-teal-500/10', twDot: 'bg-teal-400',
-      cx: 82, cy: 82, tier: 'inference',
+      cx: 82.3, cy: 81, tier: 'inference',
       badge: de ? 'EU-Souverän' : 'EU Sovereign',
       tech: ['SearXNG', 'MCP Protocol', 'Semgrep API', 'Gitleaks API'],
       services: [
@@ -177,7 +178,7 @@ function getNodes(de: boolean): NodeDef[] {
   ]
 }
 
-// ── Token counter (inference tier ambient animation) ─────────────────────────
+// ── Token counter ─────────────────────────────────────────────────────────────
 function TokenTicker({ color }: { color: string }) {
   const [n, setN] = useState(() => 12480 + Math.floor(Math.random() * 8000))
   useEffect(() => {
@@ -186,12 +187,8 @@ function TokenTicker({ color }: { color: string }) {
   }, [])
   return (
     <div className="flex items-center gap-1">
-      <motion.div
-        className="w-1 h-1 rounded-full"
-        style={{ background: color }}
-        animate={{ opacity: [1, 0.3, 1] }}
-        transition={{ duration: 0.6, repeat: Infinity }}
-      />
+      <motion.div className="w-1 h-1 rounded-full" style={{ background: color }}
+        animate={{ opacity: [1, 0.3, 1] }} transition={{ duration: 0.6, repeat: Infinity }} />
       <span className="text-[7px] font-mono tabular-nums" style={{ color, opacity: 0.65 }}>
         {n.toLocaleString('de-DE')} tok/s
       </span>
@@ -199,158 +196,173 @@ function TokenTicker({ color }: { color: string }) {
   )
 }
 
-// ── Data-flow path (always-on packets, fast when active) ─────────────────────
-function DataFlow({
-  d, revD, color, active, type,
-}: {
+// ── Data-flow packets along metro tracks ──────────────────────────────────────
+function DataFlow({ d, revD, color, active, type }: {
   d: string; revD?: string; color: string; active: boolean; type: ConnType
 }) {
   const isMcp   = type === 'mcp'
-  const speed  = active ? 1.2 : 5
-  const op     = active ? 0.85 : 0.2
-  const w      = active ? 2.5 : 1.2
-  const dash   = active ? 3   : 2
+  const dashLen = active ? 18 : 8
+  const gapLen  = active ? 110 : 280
+  const speed   = active ? 1.9 : 5.5
+  const cycle   = dashLen + gapLen
+  const op      = active ? 0.9  : 0.16
+  const pw      = active ? 3.5  : 1.5
 
   return (
     <g>
-      {/* Base line */}
-      <path
-        d={d} fill="none"
-        stroke={color}
-        strokeWidth={active ? 1 : 0.5}
-        strokeOpacity={active ? 0.4 : 0.07}
-        strokeDasharray={isMcp ? '3 6' : undefined}
+      {/* Track rail */}
+      <path d={d} fill="none" stroke={color}
+        strokeWidth={active ? 1.8 : 0.9}
+        strokeOpacity={active ? 0.38 : 0.08}
+        strokeDasharray={isMcp ? '6 12' : undefined}
         vectorEffect="non-scaling-stroke"
       />
-
-      {/* Forward packets */}
-      {[0, -28, -56].map((off, i) => (
-        <motion.path key={`f${i}`}
-          d={d} fill="none"
-          stroke={color} strokeWidth={w} strokeLinecap="round"
-          strokeDasharray={`${dash} 80`}
-          strokeOpacity={op - i * 0.07}
+      {/* Primary packet */}
+      <motion.path d={d} fill="none" stroke={color}
+        strokeWidth={pw} strokeLinecap="round"
+        strokeDasharray={`${dashLen} ${gapLen}`}
+        strokeOpacity={op}
         vectorEffect="non-scaling-stroke"
-          initial={{ strokeDashoffset: off }}
-          animate={{ strokeDashoffset: off - 83 }}
+        initial={{ strokeDashoffset: 0 }}
+        animate={{ strokeDashoffset: -cycle }}
         transition={{ duration: speed, repeat: Infinity, ease: 'linear' }}
       />
-      ))}
-
-      {/* Reverse packets for MCP (bidirectional) */}
-      {isMcp && revD && [0, -42].map((off, i) => (
-        <motion.path key={`r${i}`}
-          d={revD} fill="none"
-          stroke={color} strokeWidth={w * 0.75} strokeLinecap="round"
-          strokeDasharray={`${dash} 80`}
-          strokeOpacity={(op - i * 0.1) * 0.75}
+      {/* Staggered trailing packet when active */}
+      {active && (
+        <motion.path d={d} fill="none" stroke={color}
+          strokeWidth={pw * 0.65} strokeLinecap="round"
+          strokeDasharray={`${Math.round(dashLen * 0.7)} ${gapLen}`}
+          strokeOpacity={op * 0.55}
           vectorEffect="non-scaling-stroke"
-          initial={{ strokeDashoffset: off }}
-          animate={{ strokeDashoffset: off - 83 }}
-          transition={{ duration: speed * 1.4, repeat: Infinity, ease: 'linear' }}
+          initial={{ strokeDashoffset: Math.round(cycle * 0.55) }}
+          animate={{ strokeDashoffset: Math.round(cycle * 0.55) - cycle }}
+          transition={{ duration: speed, repeat: Infinity, ease: 'linear' }}
         />
-      ))}
+      )}
+      {/* MCP reverse flow */}
+      {isMcp && revD && (
+        <motion.path d={revD} fill="none" stroke={color}
+          strokeWidth={active ? 2.5 : 1.2} strokeLinecap="round"
+          strokeDasharray={`${Math.round(dashLen * 0.7)} ${gapLen}`}
+          strokeOpacity={op * 0.72}
+          vectorEffect="non-scaling-stroke"
+          initial={{ strokeDashoffset: Math.round(cycle * 0.48) }}
+          animate={{ strokeDashoffset: Math.round(cycle * 0.48) - cycle }}
+          transition={{ duration: speed * 1.25, repeat: Infinity, ease: 'linear' }}
+        />
+      )}
     </g>
   )
 }
 
-// ── Node card ──────────────────────────────────────────────────────────────────
-// Position wrapper (div) is never scaled — only the inner motion.button scales.
-// This prevents the "snap" that happened when translate(-50%,-50%) and scale
-// were on the same element.
-function NodeCard({
-  node, active, onClick, de,
-}: {
+// ── Metro station card ────────────────────────────────────────────────────────
+// Outer div handles absolute positioning — never scaled.
+// Inner motion.button handles hover scale only.
+function MetroStation({ node, active, onClick, de }: {
   node: NodeDef; active: boolean; onClick: () => void; de: boolean
 }) {
   const Icon    = node.icon
   const isHub   = node.id === 'litellm'
+  const sz      = isHub ? 82 : 52
 
   return (
-    <div
-      className="absolute"
-      style={{ left: `${node.cx}%`, top: `${node.cy}%`, transform: 'translate(-50%, -50%)' }}
-    >
+    <div className="absolute" style={{
+      left: `${node.cx}%`, top: `${node.cy}%`, transform: 'translate(-50%, -50%)',
+    }}>
       <motion.button
         onClick={onClick}
         whileHover={{ scale: 1.06 }}
-        whileTap={{ scale: 0.95 }}
-        transition={{ type: 'spring', stiffness: 400, damping: 25 }}
-        className="focus:outline-none block"
+        whileTap={{ scale: 0.96 }}
+        transition={{ type: 'spring', stiffness: 380, damping: 22 }}
+        className="focus:outline-none flex flex-col items-center"
+        style={{ gap: 6 }}
       >
-        <div
-          className={`relative rounded-xl border text-left transition-colors duration-200 overflow-hidden ${
-            isHub ? 'w-[148px] px-3 py-3' : 'w-[128px] px-2.5 py-2.5'
-          } ${
-            active
-              ? `${node.twBorder} ${node.twBg}`
-              : 'border-white/[0.09] bg-white/[0.04] hover:border-white/20'
-          }`}
-          style={{ boxShadow: active ? `0 0 22px -6px ${node.color}55` : 'none' }}
-        >
-          {/* Left accent bar */}
-          <div
-            className="absolute left-0 top-0 bottom-0 w-[2px] rounded-l-xl transition-all duration-300"
-            style={{ background: active ? node.color : `${node.color}28` }}
-          />
-
-          {/* Icon + title */}
-          <div className="flex items-center gap-2 pl-1 mb-1">
-            <div
-              className={`w-[22px] h-[22px] rounded-md flex items-center justify-center flex-shrink-0 border transition-colors duration-200 ${
-                active ? `${node.twBorder} ${node.twBg}` : 'border-white/10 bg-white/[0.05]'
-              }`}
-            >
-              <Icon className={`w-3 h-3 ${active ? node.twColor : 'text-white/35'}`} />
-            </div>
-            <span className={`text-[10px] font-semibold leading-tight truncate ${active ? 'text-white' : 'text-white/55'}`}>
-              {node.title}
-            </span>
+        {/* Station circle */}
+        <div className="relative flex items-center justify-center" style={{ width: sz, height: sz }}>
+          {/* Outer pulse ring on active */}
           {active && (
-              <div className={`w-1.5 h-1.5 rounded-full flex-shrink-0 animate-pulse ${node.twDot}`} />
+            <motion.div className="absolute rounded-full pointer-events-none"
+              style={{ inset: -10, border: `1.5px solid ${node.color}`, borderRadius: '50%' }}
+              animate={{ scale: [1, 1.55], opacity: [0.45, 0] }}
+              transition={{ duration: 1.9, repeat: Infinity, ease: 'easeOut' }}
+            />
           )}
-          </div>
-
-          {/* Subtitle */}
-          <p className={`text-[8px] leading-snug pl-1 mb-1 ${active ? node.twColor : 'text-white/28'}`}
-             style={{ opacity: active ? 0.8 : 1 }}>
-            {node.subtitle}
-          </p>
-
-          {/* Badge */}
-          {node.badge && (
-            <div className="pl-1">
-              <span className={`text-[7px] px-1.5 py-[1px] rounded border transition-colors duration-200 ${
-                active ? `${node.twBorder} ${node.twColor}` : 'border-white/[0.08] text-white/22'
-              }`}>
-                {node.badge}
-              </span>
-            </div>
+          {/* Hub ambient glow */}
+          {isHub && (
+            <div className="absolute rounded-full pointer-events-none"
+              style={{ inset: -6, background: `radial-gradient(circle, ${node.color}22, transparent)`, borderRadius: '50%' }}
+            />
           )}
-
-          {/* Token ticker on inference nodes */}
-          {active && node.tier === 'inference' && (
-            <div className="pl-1 mt-1.5">
-              <TokenTicker color={node.color} />
+          {/* Main circle */}
+          <div className="rounded-full flex items-center justify-center"
+            style={{
+              width: sz, height: sz,
+              background: active
+                ? `radial-gradient(circle at 38% 32%, ${node.color}38, ${node.color}14)`
+                : 'rgba(6, 12, 28, 0.92)',
+              border: `${active ? 2 : 1.5}px solid ${active ? node.color : node.color + '52'}`,
+              boxShadow: active
+                ? `0 0 26px -4px ${node.color}75, inset 0 0 18px ${node.color}18`
+                : 'none',
+              transition: 'all 0.22s ease',
+            }}
+          >
+            <Icon style={{
+              width: isHub ? 26 : 20,
+              height: isHub ? 26 : 20,
+              color: active ? node.color : `${node.color}78`,
+              transition: 'color 0.2s ease',
+            }} />
           </div>
-          )}
-
-          {/* Hub: spinning indicator ring */}
+          {/* Hub spinning dashed ring */}
           {isHub && active && (
-            <motion.div
-              className="absolute rounded-full pointer-events-none"
-              style={{ inset: -5, border: `1px dashed ${node.color}45`, borderRadius: '12px' }}
+            <motion.div className="absolute pointer-events-none"
+              style={{ inset: -11, borderRadius: '50%', border: `1px dashed ${node.color}48` }}
               animate={{ rotate: 360 }}
               transition={{ duration: 12, repeat: Infinity, ease: 'linear' }}
             />
           )}
+          {/* Active indicator dot */}
+          {active && (
+            <div className="absolute -top-0.5 -right-0.5 w-2.5 h-2.5 rounded-full animate-pulse"
+              style={{ background: node.color, boxShadow: `0 0 7px ${node.color}` }}
+            />
+          )}
+        </div>
+
+        {/* Station label */}
+        <div className="text-center pointer-events-none" style={{ maxWidth: isHub ? 136 : 114 }}>
+          <div
+            className={`font-semibold leading-tight ${isHub ? 'text-[11px]' : 'text-[9.5px]'}`}
+            style={{ color: active ? node.color : 'rgba(255,255,255,0.72)', transition: 'color 0.2s ease' }}
+          >
+            {node.title}
+          </div>
+          <div className="text-[8px] leading-tight mt-0.5"
+            style={{ color: active ? `${node.color}c0` : 'rgba(255,255,255,0.28)', transition: 'color 0.2s ease' }}>
+            {node.subtitle}
+          </div>
+          {node.badge && (
+            <div className="mt-1 inline-block text-[7px] px-1.5 py-[1px] rounded font-mono"
+              style={{
+                border: `1px solid ${active ? node.color + '65' : 'rgba(255,255,255,0.1)'}`,
+                color: active ? node.color : 'rgba(255,255,255,0.26)',
+                background: active ? `${node.color}14` : 'transparent',
+                transition: 'all 0.2s ease',
+              }}>
+              {node.badge}
+            </div>
+          )}
+          {active && node.tier === 'inference' && (
+            <div className="mt-1.5"><TokenTicker color={node.color} /></div>
+          )}
         </div>
       </motion.button>
     </div>
   )
 }
 
-// ── Main slide ─────────────────────────────────────────────────────────────────
+// ── Main slide ────────────────────────────────────────────────────────────────
 export default function ArchitectureSlide({ lang }: ArchitectureSlideProps) {
   const i      = t(lang)
   const de     = lang === 'de'
@@ -359,19 +371,16 @@ export default function ArchitectureSlide({ lang }: ArchitectureSlideProps) {
   const [activeId, setActiveId] = useState<NodeId | null>(null)
   const active = nodes.find(n => n.id === activeId) ?? null
 
-  function toggle(id: NodeId) {
-    setActiveId(prev => (prev === id ? null : id))
-  }
+  function toggle(id: NodeId) { setActiveId(prev => prev === id ? null : id) }
 
   const tenants = de
     ? ['Mandant A', 'Mandant B', 'Mandant C', 'Mandant N…']
     : ['Namespace A', 'Namespace B', 'Namespace C', 'Namespace N…']
 
-  const tiers = [
-    { y: '22%', label: de ? 'Anwendungsschicht' : 'Application Layer',  clr: '#818cf8', badge: null },
-    { y: '52%', label: de ? 'GenAI-Infrastruktur' : 'GenAI Infrastructure', clr: '#fbbf24', badge: de ? 'BSI-Rechenzentrum' : 'BSI Data Center' },
-    { y: '82%', label: de ? 'Inferenzschicht' : 'Inference Layer', clr: '#60a5fa', badge: de ? 'BSI · EU-Souverän' : 'BSI · EU Sovereign' },
-  ]
+  // Tier separator positions (% of 420px container height)
+  // App: 0–38.1% (y=0–160), Gateway: 38.1–64.3% (y=160–270), Inference: 64.3–100%
+  const SEP1 = '38.1%'
+  const SEP2 = '64.3%'
 
   return (
     <div className="space-y-3">
@@ -384,13 +393,13 @@ export default function ArchitectureSlide({ lang }: ArchitectureSlideProps) {
           <GradientText>{i.annex.architecture.title}</GradientText>
         </h2>
         <p className="text-xs text-white/35">
-          {de ? 'Klicke auf eine Komponente für Details' : 'Click any component to explore'}
+          {de ? 'Klicke auf eine Station für Details' : 'Click any station to explore'}
         </p>
       </FadeInView>
 
       <FadeInView delay={0.15} className="space-y-3">
         {/* Customer namespace strip */}
-        <div className="flex items-center gap-2 flex-wrap px-[4%]">
+        <div className="flex items-center justify-center gap-2 flex-wrap px-[4%]">
           <Users className="w-3 h-3 text-white/25 flex-shrink-0" />
           <span className="text-[9px] font-mono text-white/25 uppercase tracking-widest mr-1">
             {de ? 'Kundenmandanten' : 'Customer Namespaces'}
@@ -404,102 +413,125 @@ export default function ArchitectureSlide({ lang }: ArchitectureSlideProps) {
           <div className="flex-1 h-px bg-gradient-to-r from-white/10 to-transparent ml-1" />
         </div>
 
-        {/* ── MAP ──────────────────────────────────────────────────────────── */}
-        <div className="relative w-full" style={{ height: '410px' }}>
+        {/* ── METRO MAP ──────────────────────────────────────────────── */}
+        <div className="relative w-full rounded-xl overflow-hidden" style={{ height: '420px' }}>
 
           {/* Background */}
-          <div className="absolute inset-0 rounded-xl overflow-hidden"
+          <div className="absolute inset-0"
+            style={{ background: 'linear-gradient(175deg, #030c1e 0%, #040e24 55%, #030c1c 100%)' }}>
+            <div className="absolute inset-0"
               style={{
-              background: `
-                radial-gradient(ellipse 50% 30% at 50% 52%, rgba(251,191,36,0.06) 0%, transparent 65%),
-                radial-gradient(ellipse 60% 22% at 50% 22%, rgba(129,140,248,0.07) 0%, transparent 55%),
-                radial-gradient(ellipse 60% 20% at 50% 82%, rgba(96,165,250,0.045) 0%, transparent 55%),
-                linear-gradient(170deg, #030d1e 0%, #040f21 50%, #030c1b 100%)
-              `,
-            }}
-          >
-            <div className="absolute inset-0 opacity-[0.04]"
-              style={{
-                backgroundImage: 'radial-gradient(circle, #6b7280 1px, transparent 1px)',
-                backgroundSize: '22px 22px',
+                backgroundImage: 'radial-gradient(circle, rgba(100,110,140,0.18) 1px, transparent 1px)',
+                backgroundSize: '28px 28px',
+                opacity: 0.4,
               }}
             />
           </div>
 
+          {/* Tier band fills */}
+          <div className="absolute inset-x-0 top-0 pointer-events-none"
+            style={{ height: SEP1, background: 'rgba(129,140,248,0.028)' }} />
+          <div className="absolute inset-x-0 pointer-events-none"
+            style={{ top: SEP1, height: '26.2%', background: 'rgba(251,191,36,0.032)' }} />
+          <div className="absolute inset-x-0 pointer-events-none"
+            style={{ top: SEP2, bottom: 0, background: 'rgba(96,165,250,0.022)' }} />
+
           {/* Tier separator lines */}
-          {['37%', '66%'].map(y => (
-            <div key={y} className="absolute left-0 right-0 h-px pointer-events-none"
-              style={{ top: y, background: 'linear-gradient(to right, transparent 0%, rgba(255,255,255,0.055) 15%, rgba(255,255,255,0.055) 85%, transparent 100%)' }}
+          {[SEP1, SEP2].map(y => (
+            <div key={y} className="absolute inset-x-0 h-px pointer-events-none"
+              style={{ top: y, background: 'linear-gradient(to right, transparent 2%, rgba(255,255,255,0.07) 15%, rgba(255,255,255,0.07) 85%, transparent 98%)' }}
             />
           ))}
 
-          {/* Tier labels (left) + BSI badges (right) */}
-          {tiers.map(({ y, label, clr, badge }) => (
-            <div key={label} className="absolute inset-x-0 flex items-center justify-between px-3 pointer-events-none select-none"
-              style={{ top: y, transform: 'translateY(-50%)' }}>
-              <div className="flex items-center gap-1.5">
-                <div className="w-2.5 h-px" style={{ background: clr, opacity: 0.3 }} />
-                <span className="text-[7.5px] font-mono tracking-[0.14em] uppercase" style={{ color: clr, opacity: 0.42 }}>
-                  {label}
+          {/* Vertical tier labels — left strip */}
+          <div className="absolute left-0 top-0 bottom-0 w-7 flex flex-col pointer-events-none select-none" style={{ zIndex: 2 }}>
+            <div className="flex items-center justify-center" style={{ height: SEP1 }}>
+              <span className="text-[6.5px] font-mono tracking-[0.22em] uppercase"
+                style={{ writingMode: 'vertical-rl', transform: 'rotate(180deg)', color: 'rgba(129,140,248,0.38)' }}>
+                {de ? 'ANWENDUNG' : 'APP LAYER'}
               </span>
             </div>
-              {badge && (
-                <div className="flex items-center gap-1" style={{ opacity: 0.45 }}>
-                  <BadgeCheck className="w-2.5 h-2.5" style={{ color: clr }} />
-                  <span className="text-[7px] font-mono tracking-wider" style={{ color: clr }}>
-                    {badge}
+            <div className="flex items-center justify-center" style={{ height: '26.2%' }}>
+              <span className="text-[6.5px] font-mono tracking-[0.22em] uppercase"
+                style={{ writingMode: 'vertical-rl', transform: 'rotate(180deg)', color: 'rgba(251,191,36,0.38)' }}>
+                GATEWAY
               </span>
             </div>
-              )}
-            </div>
-          ))}
-
-          {/* MCP badge between COMPLAI and Scanner */}
-          <div
-            className="absolute text-[7px] px-2 py-[2px] rounded-full border border-emerald-500/35 text-emerald-400/65 font-mono tracking-wider select-none pointer-events-none"
-            style={{ left: '66%', top: '9%', transform: 'translate(-50%, -50%)' }}
-          >
-            MCP ↔
-          </div>
-
-          {/* Infra tech chips (secondary, very subtle, in the infra tier band) */}
-          <div className="absolute left-[5%] right-[5%] flex flex-wrap gap-1.5 pointer-events-none select-none"
-            style={{ top: '51.5%', transform: 'translateY(-50%)', paddingRight: '160px' }}>
-            {['PostgreSQL', 'MongoDB', 'Qdrant', 'Valkey', 'Nginx', 'Vault', 'Gitea', 'Orca', 'Woodpecker'].map(chip => (
-              <span key={chip}
-                className="text-[6.5px] px-1.5 py-[1px] rounded border border-white/[0.055] text-white/14 font-mono">
-                {chip}
+            <div className="flex items-center justify-center flex-1">
+              <span className="text-[6.5px] font-mono tracking-[0.22em] uppercase"
+                style={{ writingMode: 'vertical-rl', transform: 'rotate(180deg)', color: 'rgba(96,165,250,0.38)' }}>
+                {de ? 'INFERENZ' : 'INFERENCE'}
               </span>
-            ))}
+            </div>
           </div>
 
-          {/* SVG: island territories + data-flow paths */}
+          {/* BSI badges — right strip */}
+          <div className="absolute right-0 top-0 bottom-0 w-20 flex flex-col pointer-events-none select-none" style={{ zIndex: 2 }}>
+            <div style={{ height: SEP1 }} />
+            <div className="flex items-center justify-end pr-2" style={{ height: '26.2%' }}>
+              <div className="flex items-center gap-1 opacity-45">
+                <BadgeCheck className="w-2.5 h-2.5 text-amber-400" />
+                <span className="text-[6.5px] font-mono tracking-wider text-amber-400">BSI DC</span>
+              </div>
+            </div>
+            <div className="flex items-center justify-end pr-2 flex-1">
+              <div className="flex items-center gap-1 opacity-45">
+                <BadgeCheck className="w-2.5 h-2.5 text-blue-400" />
+                <span className="text-[6.5px] font-mono tracking-wider text-blue-400">
+                  {de ? 'EU-Souverän' : 'EU Sovereign'}
+                </span>
+              </div>
+            </div>
+          </div>
+
+          {/* MCP label */}
+          <div className="absolute pointer-events-none select-none"
+            style={{ left: '66%', top: '8%', transform: 'translate(-50%, -50%)', zIndex: 3 }}>
+            <span className="text-[7px] px-2 py-[2px] rounded-full border border-emerald-500/35 text-emerald-400/65 font-mono tracking-wider">
+              ⇌ MCP
+            </span>
+          </div>
+
+          {/* ── SVG: metro tracks + animated data flows ── */}
           <svg className="absolute inset-0 w-full h-full pointer-events-none"
-            viewBox="0 0 100 100"
-            preserveAspectRatio="none">
+            viewBox="0 0 1100 420" preserveAspectRatio="none">
 
-            {/* Tier zone fills */}
-            <rect x="0" y="0"  width="100" height="37"  fill="#818cf8" fillOpacity="0.018" />
-            <rect x="0" y="37" width="100" height="29"  fill="#fbbf24" fillOpacity="0.022" />
-            <rect x="0" y="66" width="100" height="34"  fill="#60a5fa"  fillOpacity="0.015" />
+            {/* Horizontal metro line — Application layer (y=105) */}
+            <line x1="165" y1="105" x2="935" y2="105"
+              stroke="rgba(129,140,248,0.14)" strokeWidth="4"
+              vectorEffect="non-scaling-stroke" />
+            {/* Station tick marks on app line */}
+            {[195, 550, 905].map(x => (
+              <line key={x} x1={x} y1="97" x2={x} y2="113"
+                stroke="rgba(129,140,248,0.45)" strokeWidth="2"
+                vectorEffect="non-scaling-stroke" />
+            ))}
 
-            {/* Island blobs per node */}
-            {nodes.map(n => {
-              const isHub = n.id === 'litellm'
-              const isActive = activeId === n.id
-              return (
-                <g key={`blob-${n.id}`}>
-                  <ellipse cx={n.cx} cy={n.cy}
-                    rx={isHub ? 14 : 8} ry={isHub ? 8.5 : 5}
-                    fill={n.color} fillOpacity={isActive ? 0.13 : 0.038}
-                    stroke={n.color} strokeWidth={0.5}
-                    strokeOpacity={isActive ? 0.35 : 0.09}
-                    strokeDasharray={isHub ? undefined : '1.5 3.5'}
-                    vectorEffect="non-scaling-stroke"
-                  />
-                </g>
-              )
-            })}
+            {/* Horizontal metro line — Inference layer (y=340) */}
+            <line x1="165" y1="340" x2="935" y2="340"
+              stroke="rgba(96,165,250,0.14)" strokeWidth="4"
+              vectorEffect="non-scaling-stroke" />
+            {/* Station tick marks on inference line */}
+            {[195, 550, 905].map(x => (
+              <line key={x} x1={x} y1="332" x2={x} y2="348"
+                stroke="rgba(96,165,250,0.45)" strokeWidth="2"
+                vectorEffect="non-scaling-stroke" />
+            ))}
+
+            {/* Gateway stub lines (short horizontal stubs from hub) */}
+            <line x1="440" y1="210" x2="660" y2="210"
+              stroke="rgba(251,191,36,0.10)" strokeWidth="3"
+              vectorEffect="non-scaling-stroke" />
+
+            {/* Junction corner dots */}
+            {[
+              { cx: 195, cy: 158 }, { cx: 522, cy: 158 },
+              { cx: 905, cy: 158 }, { cx: 578, cy: 158 },
+              { cx: 218, cy: 268 }, { cx: 550, cy: 268 }, { cx: 882, cy: 268 },
+            ].map(({ cx, cy }) => (
+              <circle key={`${cx}-${cy}`} cx={cx} cy={cy} r="3.5"
+                fill="rgba(160,170,200,0.22)" vectorEffect="non-scaling-stroke" />
+            ))}
 
             {/* Connection flows */}
             {CONNS.map(c => {
@@ -510,8 +542,7 @@ export default function ArchitectureSlide({ lang }: ArchitectureSlideProps) {
                 ? (activeId === c.from ? fromNode.color : toNode.color)
                 : '#ffffff'
               return (
-                <DataFlow
-                  key={`${c.from}-${c.to}`}
+                <DataFlow key={`${c.from}-${c.to}`}
                   d={c.d} revD={c.revD}
                   color={color} active={isActive} type={c.type}
                 />
@@ -519,11 +550,9 @@ export default function ArchitectureSlide({ lang }: ArchitectureSlideProps) {
             })}
           </svg>
 
-          {/* Node cards */}
+          {/* Metro station nodes */}
           {nodes.map(node => (
-            <NodeCard
-              key={node.id}
-              node={node}
+            <MetroStation key={node.id} node={node}
               active={activeId === node.id}
               onClick={() => toggle(node.id)}
               de={de}
@@ -531,14 +560,14 @@ export default function ArchitectureSlide({ lang }: ArchitectureSlideProps) {
           ))}
 
           {!activeId && (
-            <div className="absolute bottom-3 right-3 flex items-center gap-1 text-[8px] text-white/18 pointer-events-none">
+            <div className="absolute bottom-3 right-3 flex items-center gap-1 text-[8px] text-white/18 pointer-events-none select-none">
               <ChevronRight className="w-3 h-3" />
-              {de ? 'Komponente anklicken' : 'Click any node'}
+              {de ? 'Station anklicken' : 'Click any station'}
             </div>
           )}
         </div>
 
-        {/* ── DETAIL PANEL ──────────────────────────────────────────────────── */}
+        {/* ── DETAIL PANEL ─────────────────────────────────────────────── */}
         <AnimatePresence>
           {active && (
             <motion.div
@@ -549,14 +578,11 @@ export default function ArchitectureSlide({ lang }: ArchitectureSlideProps) {
               className={`relative rounded-2xl border ${active.twBorder} ${active.twBg} p-4`}
               style={{ boxShadow: `0 0 32px -10px ${active.color}45` }}
             >
-              <button
-                onClick={() => setActiveId(null)}
-                className="absolute top-3 right-3 w-6 h-6 rounded-full bg-white/10 hover:bg-white/20 flex items-center justify-center transition-colors"
-              >
+              <button onClick={() => setActiveId(null)}
+                className="absolute top-3 right-3 w-6 h-6 rounded-full bg-white/10 hover:bg-white/20 flex items-center justify-center transition-colors">
                 <X className="w-3 h-3 text-white/50" />
               </button>
 
-              {/* Header */}
               <div className="flex items-start gap-3 mb-4">
                 <div className={`w-9 h-9 rounded-xl flex items-center justify-center flex-shrink-0 border ${active.twBorder} ${active.twBg}`}>
                   <active.icon className={`w-5 h-5 ${active.twColor}`} />
@@ -569,7 +595,7 @@ export default function ArchitectureSlide({ lang }: ArchitectureSlideProps) {
                         {active.badge}
                       </span>
                     )}
-                    <span className={`text-[8px] px-1.5 py-0.5 rounded border border-white/10 text-white/35`}>
+                    <span className="text-[8px] px-1.5 py-0.5 rounded border border-white/10 text-white/35">
                       {active.tier === 'product' ? (de ? 'Anwendungsschicht' : 'Application Layer') :
                        active.tier === 'proxy'   ? (de ? 'GenAI-Infrastruktur' : 'GenAI Infra') :
                        (de ? 'Inferenzschicht' : 'Inference Layer')}
@@ -579,7 +605,6 @@ export default function ArchitectureSlide({ lang }: ArchitectureSlideProps) {
                 </div>
               </div>
 
-              {/* Body */}
               <div className="grid grid-cols-2 gap-5">
                 <div>
                   <p className="text-[9px] uppercase tracking-widest text-white/30 mb-2 font-semibold">
@@ -611,7 +636,6 @@ export default function ArchitectureSlide({ lang }: ArchitectureSlideProps) {
                 </div>
               </div>
 
-              {/* Connects-to */}
               <div className="mt-3 pt-3 border-t border-white/[0.06] flex items-center gap-2 flex-wrap">
                 <Network className="w-3 h-3 text-white/20 flex-shrink-0" />
                 <span className="text-[9px] text-white/30">
@@ -624,11 +648,8 @@ export default function ArchitectureSlide({ lang }: ArchitectureSlideProps) {
                     const peer   = nodes.find(n => n.id === peerId)!
                     const label  = c.type === 'mcp' ? 'MCP' : c.type === 'embed' ? 'Embed' : c.type === 'tool' ? 'Tool' : 'API'
                     return (
-                      <button
-                        key={peerId}
-                        onClick={() => setActiveId(peerId)}
-                        className={`text-[9px] px-2 py-0.5 rounded-full border ${peer.twBorder} ${peer.twColor} transition-opacity hover:opacity-80 flex items-center gap-1`}
-                      >
+                      <button key={peerId} onClick={() => setActiveId(peerId)}
+                        className={`text-[9px] px-2 py-0.5 rounded-full border ${peer.twBorder} ${peer.twColor} transition-opacity hover:opacity-80 flex items-center gap-1`}>
                         {peer.title}
                         <span className="opacity-50 text-[7px]">{label}</span>
                       </button>
@@ -639,7 +660,7 @@ export default function ArchitectureSlide({ lang }: ArchitectureSlideProps) {
           )}
         </AnimatePresence>
 
-        {/* Bottom legend */}
+        {/* Legend */}
         {!active && (
           <motion.div initial={{ opacity: 0 }} animate={{ opacity: 1 }}
             className="flex items-center justify-center gap-6 flex-wrap">
@@ -649,8 +670,7 @@ export default function ArchitectureSlide({ lang }: ArchitectureSlideProps) {
               { icon: BadgeCheck, text: de ? 'EU-souveräne Inferenz' : 'EU-sovereign inference' },
             ].map(({ icon: Icon, text }) => (
               <span key={text} className="flex items-center gap-1.5 text-[10px] text-white/22">
-                <Icon className="w-3 h-3" />
-                {text}
+                <Icon className="w-3 h-3" />{text}
               </span>
             ))}
           </motion.div>