fix(andreknie.de): close accessibility and performance review gaps

Reviewed and corrected. Verification: 47 tests passed; production build and source lint passed; all 15 routes have one title, description, canonical, main and h1; OG assets return HTTP 200.

privat/CV/andreknie.de/.gitea/workflows/deploy.yml

@@ -18,6 +18,10 @@ jobs:
         run: |
           npm ci
           npm run build
+          node scripts/check-bundle.mjs
+          test -s dist/index.html
+          test -d dist/assets
+          test -n "$(find dist/assets -type f -print -quit)"
 
       - name: Copy project files to VM
         uses: appleboy/scp-action@v0.1.7
@@ -25,7 +29,7 @@ jobs:
           host: ${{ secrets.DEPLOY_SSH_HOST }}
           username: ${{ secrets.DEPLOY_SSH_USER }}
           key: ${{ secrets.DEPLOY_SSH_KEY }}
-          source: "Caddyfile,*,dist/**,dist/.*"
+          source: "Caddyfile,docker-compose.yml,Dockerfile,server/**,package.json,package-lock.json,dist/**,dist/.*"
           target: "/opt/orchestrator/privat/CV/andreknie.de"
 
       - name: Execute Deployment on VM
@@ -35,6 +39,7 @@ jobs:
           username: ${{ secrets.DEPLOY_SSH_USER }}
           key: ${{ secrets.DEPLOY_SSH_KEY }}
           script: |
+            set -Eeuo pipefail
             cd /opt/orchestrator/privat/CV/andreknie.de
             
             # 1. Sichere .env aus den Gitea Secrets generieren
@@ -55,15 +60,37 @@ jobs:
             HASH_SALT=${{ secrets.UMAMI_HASH_SALT }}
             EOF
             
-            # 2. Frontend-Build in den Caddy-Ordner verschieben
+            # 2. Vollständiges Frontend als begrenztes Release vorbereiten.
-            mkdir -p site
+            #    Die Release-ID stammt aus dem Commit und bleibt rückverfolgbar.
-            # Wenn dist existiert, kopiere den Inhalt
+            test -s dist/index.html
-            if [ -d "dist" ]; then
+            test -d dist/assets
-              cp -r dist/* site/ || true
+            release_id="${{ github.sha }}"
-              cp -r dist/.* site/ 2>/dev/null || true
+            test -n "$release_id"
-            else
+            case "$release_id" in
-              echo "FEHLER: dist Ordner existiert nicht!"
+              (*[!A-Za-z0-9._-]*) echo "Ungültige Release-ID"; exit 1 ;;
+            esac
+            release_dir="releases/release-${release_id}"
+            previous_dir="releases/previous"
+            mkdir -p releases
+            if [ -e "$release_dir" ]; then rm -rf -- "$release_dir"; fi
+            mkdir -p "$release_dir"
+            cp -a dist/. "$release_dir/"
+            test -s "$release_dir/index.html"
+            test -n "$(find "$release_dir/assets" -type f -print -quit)"
+
+            rollback() {
+              if [ -d "$previous_dir" ]; then
+                rm -rf -- site
+                mv -- "$previous_dir" site
+                echo "Rollback auf das vorherige Release ausgeführt."
+              fi
+            }
+            trap rollback ERR
+            if [ -e site ]; then
+              rm -rf -- "$previous_dir"
+              mv -- site "$previous_dir"
             fi
+            mv -- "$release_dir" site
             
             # Debugging: Zeige an, ob die Dateien wirklich da sind
             echo "INHALT VON SITE:"
@@ -77,3 +104,8 @@ jobs:
             docker compose exec -T caddy grep -n "Content-Security-Policy" /etc/caddy/Caddyfile
             docker compose exec -T caddy caddy reload --config /etc/caddy/Caddyfile || true
             docker compose up -d --force-recreate caddy
+            trap - ERR
+
+            # Abgebrochene temporäre Releases entfernen. Neben site bleibt
+            # höchstens ein klar benannter Rollback-Stand erhalten.
+            find releases -mindepth 1 -maxdepth 1 -type d -name 'release-*' -exec rm -rf -- {} +

privat/CV/andreknie.de/content/meta/testimonials.yaml

@@ -1,6 +1,6 @@
 - quote: "André verbindet etwas, das ich in dieser Form nur selten erlebe: tiefes technisches Verständnis für KI mit einem echten Gespür für Menschen und Organisationen. Er kennt die Möglichkeiten moderner KI, versteht aber gleichzeitig die Besonderheiten von Hochschulen. Dadurch gelingt es ihm, komplexe Technologien verständlich zu machen und Organisationen zu befähigen, eigene tragfähige Lösungen zu entwickeln. Dabei geht er nicht den einfachsten Weg, sondern sucht gemeinsam nach der bestmöglichen Lösung. Besonders schätze ich die Zusammenarbeit im Tandem: Die Kombination aus unserer internen Perspektive und seiner externen Expertise hat unsere KI-Reise entscheidend vorangebracht."
   name: "Maike Mach"
-  role: "Stellvertretende Leitung Organisationsentwicklung, Universität Kassel"
+  role: "Stellv. Leiterin Personal- und Organisationsentwicklung, Universität Kassel"
 
 - quote: "André bringt uns voran, begeistert Menschen, zeigt auf was sinnvoll ist und was nicht. Durch ihn sind wir Größenordnungen schneller und sicherer. Sein Team und er befähigen uns, Dinge umzusetzen, von denen wir vorher nicht geträumt hätten."
   name: "Kunde - Projektleitung Digitalisierung"

privat/CV/andreknie.de/index.html

@@ -4,8 +4,19 @@
     <meta charset="UTF-8" />
     <link rel="icon" type="image/png" href="/logos/favicon.png" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>Dr. André Knie — KI, Transformation & Leadership</title>
+    <title data-seo-fallback>Dr. André Knie – Digitale Souveränität und KI</title>
-    <meta name="description" content="Nüchterne KI-Expertise für Mittelstand, Verwaltung und Hochschulen. Souverän, praktisch, evidenzbasiert." />
+    <meta data-seo-fallback name="description" content="Dr. André Knie unterstützt Organisationen dabei, digitale Souveränität zu erlangen und sicher von KI zu profitieren." />
+    <link data-seo-fallback rel="canonical" href="https://andreknie.de/" />
+    <meta data-seo-fallback property="og:type" content="website" />
+    <meta data-seo-fallback property="og:url" content="https://andreknie.de/" />
+    <meta data-seo-fallback property="og:title" content="Dr. André Knie – Digitale Souveränität und KI" />
+    <meta data-seo-fallback property="og:description" content="Dr. André Knie unterstützt Organisationen dabei, digitale Souveränität zu erlangen und sicher von KI zu profitieren." />
+    <meta data-seo-fallback property="og:image" content="https://andreknie.de/images/andre-knie.webp" />
+    <meta data-seo-fallback name="twitter:card" content="summary_large_image" />
+    <meta data-seo-fallback name="twitter:url" content="https://andreknie.de/" />
+    <meta data-seo-fallback name="twitter:title" content="Dr. André Knie – Digitale Souveränität und KI" />
+    <meta data-seo-fallback name="twitter:description" content="Dr. André Knie unterstützt Organisationen dabei, digitale Souveränität zu erlangen und sicher von KI zu profitieren." />
+    <meta data-seo-fallback name="twitter:image" content="https://andreknie.de/images/andre-knie.webp" />
     <!-- Umami Analytics -->
     <script
       defer

privat/CV/andreknie.de/plugins/vite-plugin-content.js

@@ -7,8 +7,13 @@ import * as yaml from 'js-yaml'
 const CONTENT_DIR = resolve(process.cwd(), 'content')
 const VIRTUAL_MODULE_ID = 'virtual:content'
 const RESOLVED_VIRTUAL_MODULE_ID = '\0' + VIRTUAL_MODULE_ID
+const DETAIL_LOADERS_MODULE_ID = 'virtual:content-detail-loaders'
+const RESOLVED_DETAIL_LOADERS_MODULE_ID = '\0' + DETAIL_LOADERS_MODULE_ID
+const DETAIL_MODULE_PREFIX = 'virtual:content-detail/'
+const RESOLVED_DETAIL_MODULE_PREFIX = '\0' + DETAIL_MODULE_PREFIX
+const DETAIL_TYPES = ['posts', 'kniepunkt']
 
-function readContentDir(subdir) {
+function readContentDir(subdir, includeBodies = false) {
   const dir = join(CONTENT_DIR, subdir)
   if (!existsSync(dir)) return []
   
@@ -22,10 +27,12 @@ function readContentDir(subdir) {
       if (ext === '.md') {
         const raw = readFileSync(filepath, 'utf-8')
         const { data, content } = matter(raw)
+        const body = renderMarkdownContent(content)
+        const searchText = body.replace(/<[^>]+>/g, ' ').replace(/\s+/g, ' ').trim().slice(0, 320)
         return {
           ...data,
           slug,
-          body: marked(content),
+          ...(includeBodies ? { body } : { searchText }),
           _source: `${subdir}/${filename}`
         }
       }
@@ -41,6 +48,18 @@ function readContentDir(subdir) {
     .filter(Boolean)
 }
 
+export function renderMarkdownContent(content) {
+  const tokens = marked.lexer(content)
+  const firstContentToken = tokens.findIndex(token => token.type !== 'space')
+  const firstToken = tokens[firstContentToken]
+
+  if (firstToken?.type === 'heading' && firstToken.depth === 1) {
+    tokens.splice(firstContentToken, 1)
+  }
+
+  return marked.parser(tokens)
+}
+
 function readMetaFile(filename) {
   const filepath = join(CONTENT_DIR, 'meta', filename)
   if (!existsSync(filepath)) return null
@@ -48,15 +67,15 @@ function readMetaFile(filename) {
   return yaml.load(raw)
 }
 
-function loadAllContent() {
+function loadAllContent(includeBodies = false) {
   return {
-    posts: readContentDir('posts'),
+    posts: readContentDir('posts', includeBodies),
-    kniepunkt: readContentDir('kniepunkt'),
+    kniepunkt: readContentDir('kniepunkt', includeBodies),
-    podcast: readContentDir('podcast'),
+    podcast: readContentDir('podcast', includeBodies),
-    talks: readContentDir('talks'),
+    talks: readContentDir('talks', includeBodies),
-    consulting: readContentDir('consulting'),
+    consulting: readContentDir('consulting', includeBodies),
-    resources: readContentDir('resources'),
+    resources: readContentDir('resources', includeBodies),
-    events: readContentDir('events'),
+    events: readContentDir('events', includeBodies),
     meta: {
       profile: readMetaFile('profile.yaml'),
       stats: readMetaFile('stats.yaml'),
@@ -70,25 +89,57 @@ function loadAllContent() {
   }
 }
 
+function createDetailLoadersModule() {
+  const typeEntries = DETAIL_TYPES.map(type => {
+    const loaders = readContentDir(type)
+      .map(item => `${JSON.stringify(item.slug)}: () => import(${JSON.stringify(`${DETAIL_MODULE_PREFIX}${type}/${item.slug}`)})`)
+      .join(',\n')
+    return `${JSON.stringify(type)}: {\n${loaders}\n}`
+  })
+
+  return `export default {\n${typeEntries.join(',\n')}\n}`
+}
+
+function loadDetailModule(id) {
+  const relativeId = id.slice(RESOLVED_DETAIL_MODULE_PREFIX.length)
+  const separator = relativeId.indexOf('/')
+  if (separator < 1) return null
+
+  const type = relativeId.slice(0, separator)
+  const slug = relativeId.slice(separator + 1)
+  if (!DETAIL_TYPES.includes(type)) return null
+
+  const item = readContentDir(type, true).find(candidate => candidate.slug === slug)
+  return item ? `export default ${JSON.stringify(item)}` : null
+}
+
 export default function contentPlugin() {
   return {
     name: 'vite-plugin-content',
     resolveId(id) {
       if (id === VIRTUAL_MODULE_ID) return RESOLVED_VIRTUAL_MODULE_ID
+      if (id === DETAIL_LOADERS_MODULE_ID) return RESOLVED_DETAIL_LOADERS_MODULE_ID
+      if (id.startsWith(DETAIL_MODULE_PREFIX)) return `\0${id}`
     },
     load(id) {
       if (id === RESOLVED_VIRTUAL_MODULE_ID) {
         const content = loadAllContent()
         return `export default ${JSON.stringify(content)}`
       }
+      if (id === RESOLVED_DETAIL_LOADERS_MODULE_ID) return createDetailLoadersModule()
+      if (id.startsWith(RESOLVED_DETAIL_MODULE_PREFIX)) return loadDetailModule(id)
     },
     handleHotUpdate({ file, server }) {
       if (file.includes('content')) {
-        const mod = server.moduleGraph.getModuleById(RESOLVED_VIRTUAL_MODULE_ID)
+        const modules = [
-        if (mod) {
+          server.moduleGraph.getModuleById(RESOLVED_VIRTUAL_MODULE_ID),
-          server.moduleGraph.invalidateModule(mod)
+          server.moduleGraph.getModuleById(RESOLVED_DETAIL_LOADERS_MODULE_ID),
-          return [mod]
+          ...Array.from(server.moduleGraph.idToModuleMap.entries())
-        }
+            .filter(([id]) => id.startsWith(RESOLVED_DETAIL_MODULE_PREFIX))
+            .map(([, module]) => module),
+        ].filter(Boolean)
+        modules.forEach(module => server.moduleGraph.invalidateModule(module))
+        return modules
       }
     }
   }

privat/CV/andreknie.de/plugins/vite-plugin-content.test.js

@@ -0,0 +1,19 @@
+import { describe, expect, it } from 'vitest'
+import { renderMarkdownContent } from './vite-plugin-content.js'
+
+describe('markdown content rendering', () => {
+  it('removes only an initial level-one heading', () => {
+    const html = renderMarkdownContent('# Duplicate title\n\nIntro\n\n## Section')
+
+    expect(html).not.toContain('<h1>Duplicate title</h1>')
+    expect(html).toContain('<p>Intro</p>')
+    expect(html).toContain('<h2>Section</h2>')
+  })
+
+  it('keeps content when no initial level-one heading exists', () => {
+    const html = renderMarkdownContent('Intro\n\n# Deliberate heading')
+
+    expect(html).toContain('<p>Intro</p>')
+    expect(html).toContain('<h1>Deliberate heading</h1>')
+  })
+})

privat/CV/andreknie.de/scripts/check-bundle.mjs

@@ -0,0 +1,27 @@
+import { readdirSync, statSync } from 'node:fs'
+import { basename, join } from 'node:path'
+
+const assetsDir = join(process.cwd(), 'dist', 'assets')
+const files = readdirSync(assetsDir)
+const entry = files.find(file => /^index-[^/]+\.js$/.test(file))
+const detailSlugs = ['posts', 'kniepunkt'].flatMap(type =>
+  readdirSync(join(process.cwd(), 'content', type))
+    .filter(file => file.endsWith('.md'))
+    .map(file => basename(file, '.md')),
+)
+const missingDetailChunks = detailSlugs.filter(
+  slug => !files.some(file => file.startsWith(`${slug}-`) && file.endsWith('.js')),
+)
+const maxInitialBytes = 400 * 1024
+
+if (!entry) throw new Error('Kein initialer JavaScript-Entry-Chunk gefunden.')
+if (missingDetailChunks.length > 0) {
+  throw new Error(`Fehlende Content-Detail-Chunks: ${missingDetailChunks.join(', ')}`)
+}
+
+const entryBytes = statSync(join(assetsDir, entry)).size
+if (entryBytes > maxInitialBytes) {
+  throw new Error(`Initialer JS-Chunk ist zu groß: ${entryBytes} Bytes (Limit ${maxInitialBytes}).`)
+}
+
+console.log(`Bundle-Prüfung: ${entry}=${entryBytes} Bytes, Detail-Chunks=${detailSlugs.length}`)

privat/CV/andreknie.de/server/index.test.js

@@ -96,4 +96,37 @@ describe('backend mail safety', () => {
     expect(await reserveToken(token)).toMatchObject({ status: 'processing' })
     await releaseToken(token)
   })
+
+  it('rejects unknown resources before any notification is sent', async () => {
+    const response = await fetch(`${baseUrl}/api/resource-download`, {
+      method: 'POST',
+      headers: { 'content-type': 'application/json' },
+      body: JSON.stringify({
+        name: 'Test',
+        email: 'test@example.invalid',
+        company: 'Synthetic Test',
+        resource_id: 'does-not-exist',
+      }),
+    })
+
+    expect(response.status).toBe(400)
+    expect((await response.json()).errors.resource_id).toBeTruthy()
+  })
+
+  it('silently accepts resource honeypot submissions', async () => {
+    const response = await fetch(`${baseUrl}/api/resource-download`, {
+      method: 'POST',
+      headers: { 'content-type': 'application/json' },
+      body: JSON.stringify({
+        name: 'Test',
+        email: 'test@example.invalid',
+        company: 'Synthetic Test',
+        resource_id: 'does-not-exist',
+        company_website: 'https://bot.example.invalid',
+      }),
+    })
+
+    expect(response.status).toBe(201)
+    expect((await response.json()).ok).toBe(true)
+  })
 })

privat/CV/andreknie.de/server/routes/resource-download.js

@@ -1,27 +1,19 @@
 import { Router } from 'express'
-import { readFileSync, writeFileSync, existsSync } from 'fs'
+import { existsSync, readdirSync } from 'fs'
 import { join, dirname } from 'path'
 import { fileURLToPath } from 'url'
-import { Mutex } from 'async-mutex'
 import { resourceLimiter } from '../middleware/rateLimiter.js'
 import { antiSpam } from '../middleware/antiSpam.js'
+import { sendStakeholderNotification, MailerNotReadyError } from '../services/mailer.js'
 
 const __dirname = dirname(fileURLToPath(import.meta.url))
-const LEADS_FILE = join(__dirname, '..', 'data', 'leads.json')
+const RESOURCES_DIR = join(__dirname, '..', '..', 'public', 'resources')
-const leadsMutex = new Mutex()
 
-// Only alphanumeric + hyphen resource IDs are allowed. This prevents path
+export function getAvailableResourceIds() {
-// traversal (e.g. "../../etc/passwd") when building the download URL.
+  if (!existsSync(RESOURCES_DIR)) return []
-const RESOURCE_ID_PATTERN = /^[a-z0-9]+(-[a-z0-9]+)*$/
+  return readdirSync(RESOURCES_DIR, { withFileTypes: true })
-
+    .filter(entry => entry.isFile() && entry.name.endsWith('.pdf') && entry.name !== 'speaker-cv-andre-knie.pdf')
-function loadLeads() {
+    .map(entry => entry.name.slice(0, -4))
-  if (!existsSync(LEADS_FILE)) return []
-  try { return JSON.parse(readFileSync(LEADS_FILE, 'utf-8')) }
-  catch { return [] }
-}
-
-function saveLeads(leads) {
-  writeFileSync(LEADS_FILE, JSON.stringify(leads, null, 2), 'utf-8')
 }
 
 const router = Router()
@@ -34,26 +26,18 @@ router.post('/', resourceLimiter, antiSpam, async (req, res) => {
   if (!email || !/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(email)) errors.email = 'Gültige E-Mail erforderlich.'
   if (!company || company.trim().length === 0) errors.company = 'Unternehmen ist erforderlich.'
   if (company && company.length > 150) errors.company = 'Max. 150 Zeichen.'
-  if (!resource_id || !RESOURCE_ID_PATTERN.test(resource_id)) errors.resource_id = 'Ungültige Resource-ID.'
+  if (!resource_id || !getAvailableResourceIds().includes(resource_id)) {
-
+    errors.resource_id = 'Diese Ressource ist derzeit nicht verfügbar.'
-  if (Object.keys(errors).length > 0) {
-    return res.status(400).json({ errors })
   }
 
-  await leadsMutex.runExclusive(async () => {
+  if (Object.keys(errors).length > 0) return res.status(400).json({ errors })
-    const leads = loadLeads()
-    leads.push({
-      name,
-      email,
-      company,
-      resource_id,
-      timestamp: new Date().toISOString(),
-    })
-    saveLeads(leads)
-  })
 
-  // Return download URL (resource files are in public/resources/)
+  try {
-  res.json({ ok: true, download_url: `/resources/${resource_id}.pdf` })
+    await sendStakeholderNotification('resource-download', { name, email, company, resource_id })
+    res.status(202).json({ ok: true, message: 'Danke! Wir prüfen die Anfrage und melden uns bei dir.' })
+  } catch (error) {
+    res.status(error instanceof MailerNotReadyError ? 503 : 502).json({ error: 'Die Anfrage konnte derzeit nicht übermittelt werden.' })
+  }
 })
 
 export default router

privat/CV/andreknie.de/server/services/mailer.js

@@ -59,20 +59,30 @@ export async function sendStakeholderNotification(type, data) {
   const subjects = {
     contact: `Neue Kontaktanfrage von ${data.name}`,
     'talk-request': `Neue Vortragsanfrage von ${data.name}`,
+    'resource-download': `Ressourcenanfrage von ${data.name}`,
   }
 
-  const body = Object.entries(data)
+  const body = buildStakeholderMessage(type, data)
-    .map(([key, val]) => `${key}: ${val}`)
-    .join('\n')
 
   await t.sendMail({
     from: SMTP_USER,
-    to: STAKEHOLDER_EMAIL,
+    to: type === 'resource-download' ? 'kontakt@d-hive.de' : STAKEHOLDER_EMAIL,
     subject: subjects[type] || `Neue Anfrage (${type})`,
     text: body,
   })
 }
 
+export function buildStakeholderMessage(type, data) {
+  const fields = Object.entries(data).map(([key, val]) => `${key}: ${val}`)
+  if (type !== 'resource-download') return fields.join('\n')
+
+  return [
+    'Bitte die angefragten Inhalte prüfen und bei positiver Prüfung ein aktuelles Profil von André verschicken.',
+    '',
+    ...fields,
+  ].join('\n')
+}
+
 export { STAKEHOLDER_EMAIL, BASE_URL }
 
 /**

privat/CV/andreknie.de/server/services/mailer.test.js

@@ -1,5 +1,10 @@
 import { describe, expect, it } from 'vitest'
-import { isMailerReady, MailerNotReadyError, sendConfirmationEmail } from './mailer.js'
+import {
+  buildStakeholderMessage,
+  isMailerReady,
+  MailerNotReadyError,
+  sendConfirmationEmail,
+} from './mailer.js'
 
 describe('mailer readiness', () => {
   it('reports missing SMTP configuration without exposing credentials', async () => {
@@ -10,3 +15,24 @@ describe('mailer readiness', () => {
       .rejects.toMatchObject({ code: 'MAILER_NOT_READY' })
   })
 })
+
+describe('stakeholder notification content', () => {
+  const data = {
+    name: 'Synthetic Test',
+    email: 'test@example.invalid',
+  }
+
+  it('adds the manual profile instruction to resource requests', () => {
+    const message = buildStakeholderMessage('resource-download', data)
+
+    expect(message).toContain('ein aktuelles Profil von André verschicken')
+    expect(message).toContain('name: Synthetic Test')
+  })
+
+  it('does not add the resource instruction to contact notifications', () => {
+    const message = buildStakeholderMessage('contact', data)
+
+    expect(message).not.toContain('ein aktuelles Profil von André verschicken')
+    expect(message).toBe('name: Synthetic Test\nemail: test@example.invalid')
+  })
+})

privat/CV/andreknie.de/src/App.jsx

@@ -1,25 +1,30 @@
-import React from 'react'
+import React, { lazy, Suspense } from 'react'
 import { Routes, Route } from 'react-router-dom'
 import Navigation from './components/Navigation'
 import Footer from './components/Footer'
 import BackgroundPattern from './components/BackgroundPattern'
 import BottomDock from './components/BottomDock'
 import ScrollToTop from './components/ScrollToTop'
-import Home from './pages/Home'
+
-import Articles from './pages/Articles'
+const Home = lazy(() => import('./pages/Home'))
-import ArticleSingle from './pages/ArticleSingle'
+const Articles = lazy(() => import('./pages/Articles'))
-import Kniepunkt from './pages/Kniepunkt'
+const ArticleSingle = lazy(() => import('./pages/ArticleSingle'))
-import KniepunktIssue from './pages/KniepunktIssue'
+const Kniepunkt = lazy(() => import('./pages/Kniepunkt'))
-import Podcast from './pages/Podcast'
+const KniepunktIssue = lazy(() => import('./pages/KniepunktIssue'))
-import Speaking from './pages/Speaking'
+const Podcast = lazy(() => import('./pages/Podcast'))
-import Consulting from './pages/Consulting'
+const Speaking = lazy(() => import('./pages/Speaking'))
-import Resources from './pages/Resources'
+const Consulting = lazy(() => import('./pages/Consulting'))
-import Contact from './pages/Contact'
+const Resources = lazy(() => import('./pages/Resources'))
-import Impressum from './pages/Impressum'
+const Contact = lazy(() => import('./pages/Contact'))
-import Datenschutz from './pages/Datenschutz'
+const Impressum = lazy(() => import('./pages/Impressum'))
-import About from './pages/About'
+const Datenschutz = lazy(() => import('./pages/Datenschutz'))
-import NotFound from './pages/NotFound'
+const About = lazy(() => import('./pages/About'))
-import Confirmation from './pages/Confirmation'
+const NotFound = lazy(() => import('./pages/NotFound'))
+const Confirmation = lazy(() => import('./pages/Confirmation'))
+
+function PageFallback() {
+  return <div className="page-loading" role="status" aria-live="polite">Inhalt wird geladen …</div>
+}
 
 export default function App() {
   return (
@@ -28,23 +33,25 @@ export default function App() {
       <div className="app-root">
         <BackgroundPattern />
         <Navigation />
-        <Routes>
+        <Suspense fallback={<PageFallback />}>
-          <Route path="/" element={<Home />} />
+          <Routes>
-          <Route path="/artikel" element={<Articles />} />
+            <Route path="/" element={<Home />} />
-          <Route path="/artikel/:slug" element={<ArticleSingle />} />
+            <Route path="/artikel" element={<Articles />} />
-          <Route path="/kniepunkt" element={<Kniepunkt />} />
+            <Route path="/artikel/:slug" element={<ArticleSingle />} />
-          <Route path="/kniepunkt/:slug" element={<KniepunktIssue />} />
+            <Route path="/kniepunkt" element={<Kniepunkt />} />
-          <Route path="/podcast" element={<Podcast />} />
+            <Route path="/kniepunkt/:slug" element={<KniepunktIssue />} />
-          <Route path="/speaking" element={<Speaking />} />
+            <Route path="/podcast" element={<Podcast />} />
-          <Route path="/consulting" element={<Consulting />} />
+            <Route path="/speaking" element={<Speaking />} />
-          <Route path="/resources" element={<Resources />} />
+            <Route path="/consulting" element={<Consulting />} />
-          <Route path="/kontakt" element={<Contact />} />
+            <Route path="/resources" element={<Resources />} />
-          <Route path="/ueber-mich" element={<About />} />
+            <Route path="/kontakt" element={<Contact />} />
-          <Route path="/impressum" element={<Impressum />} />
+            <Route path="/ueber-mich" element={<About />} />
-          <Route path="/datenschutz" element={<Datenschutz />} />
+            <Route path="/impressum" element={<Impressum />} />
-          <Route path="/bestaetigung" element={<Confirmation />} />
+            <Route path="/datenschutz" element={<Datenschutz />} />
-          <Route path="*" element={<NotFound />} />
+            <Route path="/bestaetigung" element={<Confirmation />} />
-        </Routes>
+            <Route path="*" element={<NotFound />} />
+          </Routes>
+        </Suspense>
         <Footer />
         <BottomDock />
       </div>

privat/CV/andreknie.de/src/components/AnimationLifecycle.test.jsx

@@ -0,0 +1,65 @@
+import React from 'react'
+import { act, render } from '@testing-library/react'
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+import BackgroundPattern from './BackgroundPattern'
+import DotCloudIcon from './DotCloudIcon'
+
+const context = {
+  arc: vi.fn(),
+  beginPath: vi.fn(),
+  clearRect: vi.fn(),
+  closePath: vi.fn(),
+  drawImage: vi.fn(),
+  ellipse: vi.fn(),
+  fill: vi.fn(),
+  getImageData: vi.fn(() => ({ data: new Uint8ClampedArray(140 * 140 * 4) })),
+  lineTo: vi.fn(),
+  moveTo: vi.fn(),
+  quadraticCurveTo: vi.fn(),
+  scale: vi.fn(),
+  setTransform: vi.fn(),
+}
+
+function setReducedMotion(matches) {
+  vi.stubGlobal('matchMedia', vi.fn(() => ({
+    matches,
+    addEventListener: vi.fn(),
+    removeEventListener: vi.fn(),
+  })))
+}
+
+describe('canvas animation lifecycle', () => {
+  beforeEach(() => {
+    vi.spyOn(HTMLCanvasElement.prototype, 'getContext').mockReturnValue(context)
+    Object.defineProperty(document, 'hidden', { configurable: true, value: false })
+    vi.stubGlobal('requestAnimationFrame', vi.fn(() => 17))
+    vi.stubGlobal('cancelAnimationFrame', vi.fn())
+  })
+
+  afterEach(() => {
+    vi.restoreAllMocks()
+    vi.unstubAllGlobals()
+  })
+
+  it('does not schedule background animation with reduced motion', () => {
+    setReducedMotion(true)
+    render(<BackgroundPattern />)
+    expect(requestAnimationFrame).not.toHaveBeenCalled()
+  })
+
+  it('cancels a scheduled background frame on unmount', () => {
+    setReducedMotion(false)
+    const { unmount } = render(<BackgroundPattern />)
+    expect(requestAnimationFrame).toHaveBeenCalled()
+
+    unmount()
+    expect(cancelAnimationFrame).toHaveBeenCalledWith(17)
+  })
+
+  it('does not schedule dot animation with reduced motion', async () => {
+    setReducedMotion(true)
+    render(<DotCloudIcon shape="shield" />)
+    await act(async () => Promise.resolve())
+    expect(requestAnimationFrame).not.toHaveBeenCalled()
+  })
+})

privat/CV/andreknie.de/src/components/BackgroundPattern.jsx

@@ -15,12 +15,14 @@ export default function BackgroundPattern() {
     const canvas = canvasRef.current
     if (!canvas) return
     const ctx = canvas.getContext('2d')
+    const reducedMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches
+    const accentColor = getComputedStyle(document.documentElement).getPropertyValue('--accent-color').trim() || '#4a9eff'
 
     function resize() {
       const dpr = window.devicePixelRatio || 1
       canvas.width = window.innerWidth * dpr
       canvas.height = window.innerHeight * dpr
-      ctx.scale(dpr, dpr)
+      ctx.setTransform(dpr, 0, 0, dpr, 0, 0)
       canvas.style.width = window.innerWidth + 'px'
       canvas.style.height = window.innerHeight + 'px'
       initParticles()
@@ -61,8 +63,6 @@ export default function BackgroundPattern() {
       const h = window.innerHeight
       ctx.clearRect(0, 0, w, h)
 
-      const style = getComputedStyle(document.documentElement)
-      const accentColor = style.getPropertyValue('--accent-color').trim() || '#4a9eff'
       const mouse = mouseRef.current
       const repelRadius = 80
 
@@ -99,14 +99,21 @@ export default function BackgroundPattern() {
         ctx.globalAlpha = 1
       })
 
-      animRef.current = requestAnimationFrame(animate)
+      if (!reducedMotion && !document.hidden) animRef.current = requestAnimationFrame(animate)
+    }
+
+    function handleVisibilityChange() {
+      if (document.hidden) cancelAnimationFrame(animRef.current)
+      else if (!reducedMotion) animate()
     }
 
     animate()
+    document.addEventListener('visibilitychange', handleVisibilityChange)
     return () => {
       cancelAnimationFrame(animRef.current)
       window.removeEventListener('resize', resize)
       window.removeEventListener('mousemove', handleMouseMove)
+      document.removeEventListener('visibilitychange', handleVisibilityChange)
     }
   }, [])
 

privat/CV/andreknie.de/src/components/BottomDock.css

@@ -76,6 +76,11 @@
   transform: translateY(-8px) scale(1.15);
 }
 
+.dock-item:focus-visible {
+  outline: 2px solid var(--accent-color);
+  outline-offset: 3px;
+}
+
 .dock-item.active {
   color: var(--accent-color);
   background: rgba(var(--accent-color-rgb), 0.1);
@@ -114,6 +119,23 @@
 }
 
 @media (max-width: 600px) {
-  .dock { gap: 6px; padding: 6px 8px; }
+  .dock-container {
-  .dock-item { width: 38px; height: 38px; }
+    bottom: max(12px, env(safe-area-inset-bottom));
+    max-width: calc(100vw - 24px);
+  }
+
+  .dock {
+    gap: 6px;
+    padding: 6px 8px;
+    max-width: 100%;
+  }
+
+  .dock-item-wrapper-secondary {
+    display: none;
+  }
+
+  .dock-item {
+    width: 44px;
+    height: 44px;
+  }
 }

privat/CV/andreknie.de/src/components/BottomDock.jsx

@@ -10,22 +10,29 @@ export default function BottomDock() {
     { label: 'Home', path: '/', icon: <Home size={20} /> },
     { label: 'Artikel', path: '/artikel', icon: <Newspaper size={20} /> },
     { label: 'Kniepunkt', path: '/kniepunkt', icon: <span style={{ fontWeight: 800, fontSize: '1.2rem', fontFamily: 'serif' }}>K</span> },
-    { label: 'Podcast', path: '/podcast', icon: <Mic size={20} /> },
+    { label: 'Podcast', path: '/podcast', icon: <Mic size={20} />, secondary: true },
     { label: 'Speaking', path: '/speaking', icon: <MessageSquare size={20} /> },
-    { label: 'Beratung', path: '/consulting', icon: <Briefcase size={20} /> },
+    { label: 'Beratung', path: '/consulting', icon: <Briefcase size={20} />, secondary: true },
-    { label: 'Über mich', path: '/ueber-mich', icon: <User size={20} /> },
+    { label: 'Über mich', path: '/ueber-mich', icon: <User size={20} />, secondary: true },
     { label: 'Kontakt', path: '/kontakt', icon: <Mail size={20} /> },
   ]
 
   return (
     <div className="dock-container">
-      <nav className="dock">
+      <nav className="dock" aria-label="Schnellnavigation">
         {items.map((item) => {
-          const isActive = location.pathname === item.path
+          const isActive = item.path === '/'
+            ? location.pathname === '/'
+            : location.pathname === item.path || location.pathname.startsWith(`${item.path}/`)
           return (
-            <div className="dock-item-wrapper" key={item.path}>
+            <div className={`dock-item-wrapper${item.secondary ? ' dock-item-wrapper-secondary' : ''}`} key={item.path}>
               <span className="dock-tooltip">{item.label}</span>
-              <Link to={item.path} className={`dock-item ${isActive ? 'active' : ''}`}>
+              <Link
+                to={item.path}
+                className={`dock-item ${isActive ? 'active' : ''}`}
+                aria-label={item.label}
+                aria-current={isActive ? 'page' : undefined}
+              >
                 {item.icon}
               </Link>
             </div>

privat/CV/andreknie.de/src/components/BottomDock.test.jsx

@@ -0,0 +1,30 @@
+import React from 'react'
+import { describe, expect, it } from 'vitest'
+import { render } from '@testing-library/react'
+import { MemoryRouter } from 'react-router-dom'
+import { readFileSync } from 'fs'
+import { join } from 'path'
+import BottomDock from './BottomDock'
+
+describe('BottomDock', () => {
+  it('keeps secondary links available on desktop and marks them for mobile hiding', () => {
+    const { container } = render(
+      <MemoryRouter initialEntries={['/']}>
+        <BottomDock />
+      </MemoryRouter>,
+    )
+
+    expect(container.querySelectorAll('.dock-item')).toHaveLength(8)
+    expect(container.querySelectorAll('.dock-item-wrapper-secondary')).toHaveLength(3)
+    expect(container.querySelectorAll('.dock-item[aria-label]')).toHaveLength(8)
+  })
+
+  it('reserves mobile space and keeps touch targets at least 44 pixels', () => {
+    const css = readFileSync(join(process.cwd(), 'src', 'components', 'BottomDock.css'), 'utf-8')
+    const mobileRule = css.match(/@media \(max-width: 600px\) \{([\s\S]*)\}\s*$/)
+
+    expect(mobileRule?.[1]).toContain('dock-item-wrapper-secondary')
+    expect(mobileRule?.[1]).toMatch(/width: 44px/)
+    expect(mobileRule?.[1]).toMatch(/height: 44px/)
+  })
+})

privat/CV/andreknie.de/src/components/DotCloudIcon.jsx

@@ -20,6 +20,9 @@ export default function DotCloudIcon({ shape = 'germany', size = 140 }) {
     const canvas = canvasRef.current
     if (!canvas) return
     const ctx = canvas.getContext('2d')
+    const reducedMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches
+    const color = getComputedStyle(document.documentElement).getPropertyValue('--accent-color').trim() || '#4a9eff'
+    let active = true
     const dpr = window.devicePixelRatio || 1
     canvas.width = size * dpr
     canvas.height = size * dpr
@@ -27,6 +30,7 @@ export default function DotCloudIcon({ shape = 'germany', size = 140 }) {
 
     async function init() {
       const points = await getShapePoints(shape, size)
+      if (!active) return
       particlesRef.current = points.map(p => ({
         x: p.x, y: p.y,
         baseX: p.x, baseY: p.y,
@@ -34,6 +38,7 @@ export default function DotCloudIcon({ shape = 'germany', size = 140 }) {
         vx: 0, vy: 0,
       }))
       initializedRef.current = true
+      animate()
     }
 
     function handleMouseMove(e) {
@@ -48,16 +53,15 @@ export default function DotCloudIcon({ shape = 'germany', size = 140 }) {
 
     canvas.addEventListener('mousemove', handleMouseMove)
     canvas.addEventListener('mouseleave', handleMouseLeave)
+    document.addEventListener('visibilitychange', handleVisibilityChange)
 
     function animate() {
       ctx.clearRect(0, 0, size, size)
       if (!initializedRef.current) {
-        animRef.current = requestAnimationFrame(animate)
+        if (!reducedMotion) animRef.current = requestAnimationFrame(animate)
         return
       }
 
-      const style = getComputedStyle(document.documentElement)
-      const color = style.getPropertyValue('--accent-color').trim() || '#4a9eff'
       const mouse = mouseRef.current
       const repelRadius = 25
 
@@ -98,16 +102,22 @@ export default function DotCloudIcon({ shape = 'germany', size = 140 }) {
         ctx.fill()
       })
       ctx.globalAlpha = 1
-      animRef.current = requestAnimationFrame(animate)
+      if (!reducedMotion && !document.hidden) animRef.current = requestAnimationFrame(animate)
+    }
+
+    function handleVisibilityChange() {
+      if (document.hidden) cancelAnimationFrame(animRef.current)
+      else if (!reducedMotion) animate()
     }
 
     init()
-    animate()
 
     return () => {
+      active = false
       cancelAnimationFrame(animRef.current)
       canvas.removeEventListener('mousemove', handleMouseMove)
       canvas.removeEventListener('mouseleave', handleMouseLeave)
+      document.removeEventListener('visibilitychange', handleVisibilityChange)
     }
   }, [shape, size])
 
@@ -177,10 +187,9 @@ function sampleGermany(size) {
         }
       }
       
-      console.log('[DotCloudIcon] Germany points:', points.length)
       resolve(points)
     }
-    img.onerror = () => { console.error('[DotCloudIcon] Failed to load germany image'); resolve([]) }
+    img.onerror = () => resolve([])
     img.src = '/images/germany-outline.png'
   })
 }

privat/CV/andreknie.de/src/components/LogoMarquee.css

@@ -26,6 +26,11 @@
   -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
 }
 
+.marquee-track:focus-visible {
+  outline: 2px solid var(--accent-color);
+  outline-offset: -2px;
+}
+
 .marquee-inner {
   display: flex;
   gap: 60px;
@@ -34,6 +39,11 @@
   width: max-content;
 }
 
+.marquee-section:hover .marquee-inner,
+.marquee-section:focus-within .marquee-inner {
+  animation-play-state: paused;
+}
+
 .marquee-item {
   flex-shrink: 0;
   display: flex;

privat/CV/andreknie.de/src/components/LogoMarquee.jsx

@@ -18,10 +18,10 @@ export default function LogoMarquee({ logos = [], title = '', titleAccent = '',
           {title} {titleAccent && <span className="text-gradient">{titleAccent}</span>}
         </h2>
       )}
-      <div className="marquee-track">
+      <div className="marquee-track" role="region" aria-label="Kunden- und Partnerlogos" tabIndex="0">
         <div className="marquee-inner">
           {allLogos.map((logo, i) => (
-            <div className="marquee-item" key={i}>
+            <div className="marquee-item" key={i} aria-hidden={i >= logos.length}>
               {logo.src ? (
                 <img src={logo.src} alt={logo.name} />
               ) : (

privat/CV/andreknie.de/src/components/LogoMarquee.test.jsx

@@ -0,0 +1,13 @@
+import React from 'react'
+import { describe, expect, it } from 'vitest'
+import { render } from '@testing-library/react'
+import LogoMarquee from './LogoMarquee'
+
+describe('LogoMarquee accessibility', () => {
+  it('hides loop copies from assistive technology', () => {
+    const { container } = render(<LogoMarquee logos={[{ name: 'Logo A' }, { name: 'Logo B' }]} />)
+    expect(container.querySelectorAll('.marquee-item:not([aria-hidden="true"])')).toHaveLength(2)
+    expect(container.querySelectorAll('.marquee-item[aria-hidden="true"]')).toHaveLength(4)
+    expect(container.querySelector('.marquee-track').tabIndex).toBe(0)
+  })
+})

privat/CV/andreknie.de/src/components/Navigation.css

@@ -75,6 +75,14 @@
   padding: 8px;
 }
 
+.hamburger:focus-visible,
+.nav-link:focus-visible,
+.nav-mobile-link:focus-visible,
+.logo:focus-visible {
+  outline: 2px solid var(--accent-color);
+  outline-offset: 4px;
+}
+
 .hamburger span {
   display: block;
   width: 24px;

privat/CV/andreknie.de/src/components/Navigation.jsx

@@ -13,7 +13,15 @@ export default function Navigation() {
     return () => window.removeEventListener('scroll', handleScroll)
   }, [])
 
-  // Close the mobile menu whenever navigation occurs.
+  useEffect(() => {
+    function handleKeyDown(event) {
+      if (event.key === 'Escape') setMobileOpen(false)
+    }
+
+    document.addEventListener('keydown', handleKeyDown)
+    return () => document.removeEventListener('keydown', handleKeyDown)
+  }, [])
+
   function closeMenu() {
     setMobileOpen(false)
   }
@@ -28,8 +36,10 @@ export default function Navigation() {
     { to: '/kontakt', label: 'Kontakt' },
   ]
 
+  const isActive = (path) => location.pathname === path || location.pathname.startsWith(`${path}/`)
+
   return (
-    <nav className={`navigation ${scrolled ? 'scrolled' : ''}`}>
+    <nav className={`navigation ${scrolled ? 'scrolled' : ''}`} aria-label="Hauptnavigation">
       <div className="nav-container app-container">
         <Link to="/" className="logo" onClick={closeMenu}>
           <span className="logo-text">Dr. André Knie</span>
@@ -40,18 +50,21 @@ export default function Navigation() {
             <Link
               key={link.to}
               to={link.to}
-              className={`nav-link ${location.pathname === link.to ? 'active' : ''}`}
+              className={`nav-link ${isActive(link.to) ? 'active' : ''}`}
+              aria-current={isActive(link.to) ? 'page' : undefined}
             >
               {link.label}
             </Link>
           ))}
         </div>
 
-        {/* Mobile hamburger (only visible on small screens) */}
         <button
           className={`hamburger ${mobileOpen ? 'active' : ''}`}
-          onClick={() => setMobileOpen(!mobileOpen)}
+          onClick={() => setMobileOpen(open => !open)}
-          aria-label="Menü öffnen"
+          aria-label={mobileOpen ? 'Menü schließen' : 'Menü öffnen'}
+          aria-expanded={mobileOpen}
+          aria-controls="mobile-navigation"
+          type="button"
         >
           <span></span>
           <span></span>
@@ -59,14 +72,14 @@ export default function Navigation() {
         </button>
       </div>
 
-      {/* Mobile dropdown */}
+      <div id="mobile-navigation" className={`nav-mobile ${mobileOpen ? 'open' : ''}`} hidden={!mobileOpen}>
-      <div className={`nav-mobile ${mobileOpen ? 'open' : ''}`}>
         {navLinks.map(link => (
           <Link
             key={link.to}
             to={link.to}
-            className={`nav-mobile-link ${location.pathname === link.to ? 'active' : ''}`}
+            className={`nav-mobile-link ${isActive(link.to) ? 'active' : ''}`}
             onClick={closeMenu}
+            aria-current={isActive(link.to) ? 'page' : undefined}
           >
             {link.label}
           </Link>

privat/CV/andreknie.de/src/components/Navigation.test.jsx

@@ -0,0 +1,29 @@
+import React from 'react'
+import { describe, expect, it } from 'vitest'
+import { fireEvent, render, screen } from '@testing-library/react'
+import { MemoryRouter } from 'react-router-dom'
+import Navigation from './Navigation'
+
+describe('Navigation accessibility', () => {
+  it('exposes menu state and closes it with Escape', () => {
+    render(<MemoryRouter><Navigation /></MemoryRouter>)
+    const toggle = screen.getByRole('button', { name: 'Menü öffnen' })
+    const mobileNavigation = document.getElementById('mobile-navigation')
+
+    expect(mobileNavigation.hidden).toBe(true)
+    fireEvent.click(toggle)
+    expect(toggle.getAttribute('aria-expanded')).toBe('true')
+    expect(toggle.getAttribute('aria-controls')).toBe('mobile-navigation')
+    expect(mobileNavigation.hidden).toBe(false)
+
+    fireEvent.keyDown(document, { key: 'Escape' })
+    expect(toggle.getAttribute('aria-expanded')).toBe('false')
+    expect(toggle.getAttribute('aria-label')).toBe('Menü öffnen')
+    expect(mobileNavigation.hidden).toBe(true)
+  })
+
+  it('marks detail navigation routes as current', () => {
+    render(<MemoryRouter initialEntries={['/artikel/beispiel']}><Navigation /></MemoryRouter>)
+    expect(screen.getAllByRole('link', { name: 'Artikel' }).every(link => link.getAttribute('aria-current') === 'page')).toBe(true)
+  })
+})

privat/CV/andreknie.de/src/components/NewsletterSignup.jsx

@@ -40,7 +40,7 @@ export default function NewsletterSignup({ newsletter }) {
         {newsletter.email_signup && (
           <form className="newsletter-email" onSubmit={handleSubmit}>
             {/* Honeypot */}
-            <div aria-hidden="true" style={{ position: 'absolute', left: '-9999px', width: '1px', height: '1px', overflow: 'hidden' }}>
+            <div hidden>
               <label>
                 Firmen-Website (bitte leer lassen)
                 <input name="company_website" tabIndex={-1} autoComplete="off" value={form.company_website} onChange={(e) => setForm(p => ({ ...p, company_website: e.target.value }))} />
@@ -48,7 +48,7 @@ export default function NewsletterSignup({ newsletter }) {
             </div>
 
             {success ? (
-              <p className="newsletter-success">Fast geschafft! Bitte bestätige die Anmeldung in der E-Mail, die wir dir gerade geschickt haben.</p>
+              <p className="newsletter-success" role="status" aria-live="polite">Fast geschafft! Bitte bestätige die Anmeldung in der E-Mail, die wir dir gerade geschickt haben.</p>
             ) : (
               <>
                 <div className="newsletter-input-row">
@@ -60,13 +60,15 @@ export default function NewsletterSignup({ newsletter }) {
                     value={form.email}
                     onChange={(e) => setForm(p => ({ ...p, email: e.target.value }))}
                     aria-label="E-Mail-Adresse"
+                    aria-invalid={Boolean(errors.email)}
+                    aria-describedby={errors.email ? 'newsletter-email-error' : undefined}
                   />
                   <button type="submit" className="secondary-button" disabled={loading}>
                     {loading ? '...' : 'Abonnieren'}
                   </button>
                 </div>
-                {errors.email && <p className="newsletter-error">{errors.email}</p>}
+                {errors.email && <p id="newsletter-email-error" className="newsletter-error" role="alert">{errors.email}</p>}
-                {serverError && <p className="newsletter-error">{serverError}</p>}
+                {serverError && <p className="newsletter-error" role="alert" aria-live="assertive">{serverError}</p>}
               </>
             )}
           </form>

privat/CV/andreknie.de/src/components/SEOHead.jsx

@@ -1,33 +1,36 @@
-import React from 'react'
+import React, { useEffect } from 'react'
 import { Helmet } from 'react-helmet-async'
+import { absoluteUrl, BRAND_SUFFIX, DEFAULT_DESCRIPTION, DEFAULT_IMAGE, DEFAULT_TITLE, normalizeTitle } from './seo.js'
 
-export default function SEOHead({ title, description, url, image, type = 'website' }) {
+export default function SEOHead({ title, description, url, image, type = 'website', noindex = false }) {
-  const defaultTitle = "Dr. André Knie - Experte für Digitale Souveränität"
+  const pageTitle = normalizeTitle(title)
-  const defaultDescription = "Dr. André Knie unterstützt Organisationen dabei, digitale Souveränität zu erlangen und sicher von KI zu profitieren."
+  const siteTitle = pageTitle === DEFAULT_TITLE ? pageTitle : `${pageTitle}${BRAND_SUFFIX}`
-  
+  const siteDescription = description || DEFAULT_DESCRIPTION
-  const siteTitle = title ? `${title} | Dr. André Knie` : defaultTitle
+  const canonicalUrl = absoluteUrl(url || '/', '/')
-  const siteDesc = description || defaultDescription
+  const imageUrl = absoluteUrl(image, DEFAULT_IMAGE)
-  const siteUrl = url ? `https://andreknie.de${url}` : "https://andreknie.de"
+
-  const siteImage = image || "https://andreknie.de/images/og-image.webp"
+  useEffect(() => {
+    document.head.querySelectorAll('[data-seo-fallback]').forEach(node => node.remove())
+  }, [])
 
   return (
     <Helmet>
       <title>{siteTitle}</title>
-      <meta name="description" content={siteDesc} />
+      <meta name="description" content={siteDescription} />
-      
+      <link rel="canonical" href={canonicalUrl} />
-      {/* Open Graph / Facebook */}
+      {noindex && <meta name="robots" content="noindex,follow" />}
-      <meta property="og:type" content={type} />
-      <meta property="og:url" content={siteUrl} />
-      <meta property="og:title" content={siteTitle} />
-      <meta property="og:description" content={siteDesc} />
-      <meta property="og:image" content={siteImage} />
 
-      {/* Twitter */}
+      <meta property="og:type" content={type} />
-      <meta property="twitter:card" content="summary_large_image" />
+      <meta property="og:url" content={canonicalUrl} />
-      <meta property="twitter:url" content={siteUrl} />
+      <meta property="og:title" content={siteTitle} />
-      <meta property="twitter:title" content={siteTitle} />
+      <meta property="og:description" content={siteDescription} />
-      <meta property="twitter:description" content={siteDesc} />
+      <meta property="og:image" content={imageUrl} />
-      <meta property="twitter:image" content={siteImage} />
+
+      <meta name="twitter:card" content="summary_large_image" />
+      <meta name="twitter:url" content={canonicalUrl} />
+      <meta name="twitter:title" content={siteTitle} />
+      <meta name="twitter:description" content={siteDescription} />
+      <meta name="twitter:image" content={imageUrl} />
     </Helmet>
   )
 }

privat/CV/andreknie.de/src/components/SEOHead.test.jsx

@@ -0,0 +1,62 @@
+import React from 'react'
+import { afterEach, describe, expect, it } from 'vitest'
+import { render, cleanup } from '@testing-library/react'
+import { HelmetProvider } from 'react-helmet-async'
+import SEOHead from './SEOHead'
+import { BRAND_SUFFIX } from './seo.js'
+
+afterEach(() => {
+  cleanup()
+  document.head.querySelectorAll('[data-rh="true"]').forEach(node => node.remove())
+})
+
+describe('SEOHead', () => {
+  it('renders one branded title, description, and canonical link', () => {
+    render(
+      <HelmetProvider>
+        <SEOHead title={`Artikel${BRAND_SUFFIX}`} description="Synthetic description" url="/artikel" />
+      </HelmetProvider>,
+    )
+
+    expect(document.head.querySelectorAll('title')).toHaveLength(1)
+    expect(document.title).toBe(`Artikel${BRAND_SUFFIX}`)
+    expect(document.title.match(/Dr\. André Knie/g)).toHaveLength(1)
+    expect(document.head.querySelectorAll('meta[name="description"]')).toHaveLength(1)
+    expect(document.head.querySelector('link[rel="canonical"]')?.getAttribute('href')).toBe('https://andreknie.de/artikel')
+  })
+
+  it('replaces static fallback metadata instead of duplicating it', () => {
+    document.head.insertAdjacentHTML('beforeend', `
+      <title data-seo-fallback>Fallback</title>
+      <meta data-seo-fallback name="description" content="Fallback description">
+      <link data-seo-fallback rel="canonical" href="https://andreknie.de/">
+    `)
+
+    render(
+      <HelmetProvider>
+        <SEOHead title="Artikel" description="Article description" url="/artikel" />
+      </HelmetProvider>,
+    )
+
+    expect(document.head.querySelectorAll('[data-seo-fallback]')).toHaveLength(0)
+    expect(document.head.querySelectorAll('title')).toHaveLength(1)
+    expect(document.head.querySelectorAll('meta[name="description"]')).toHaveLength(1)
+    expect(document.head.querySelectorAll('link[rel="canonical"]')).toHaveLength(1)
+  })
+
+  it('normalizes relative and absolute image URLs', () => {
+    const { rerender } = render(
+      <HelmetProvider>
+        <SEOHead title="Test" image="/images/andre-knie.webp" />
+      </HelmetProvider>,
+    )
+
+    expect(document.head.querySelector('meta[property="og:image"]')?.getAttribute('content')).toBe('https://andreknie.de/images/andre-knie.webp')
+    rerender(
+      <HelmetProvider>
+        <SEOHead title="Test" image="https://cdn.example.invalid/image.webp" />
+      </HelmetProvider>,
+    )
+    expect(document.head.querySelector('meta[property="og:image"]')?.getAttribute('content')).toBe('https://cdn.example.invalid/image.webp')
+  })
+})

privat/CV/andreknie.de/src/components/SpeakerCvRequest.jsx

@@ -43,7 +43,7 @@ export default function SpeakerCvRequest() {
   return (
     <div className="glass-panel" style={{ padding: '32px', marginTop: '8px', width: '100%' }}>
       {success ? (
-        <p style={{ margin: 0, color: 'var(--text-primary)' }}>
+        <p role="status" aria-live="polite" style={{ margin: 0, color: 'var(--text-primary)' }}>
           Danke! Der Speaker CV ist auf dem Weg in dein Postfach.
         </p>
       ) : (
@@ -53,7 +53,7 @@ export default function SpeakerCvRequest() {
           </p>
 
           {/* Honeypot */}
-          <div aria-hidden="true" style={{ position: 'absolute', left: '-9999px', width: '1px', height: '1px', overflow: 'hidden' }}>
+          <div hidden>
             <label>
               Firmen-Website (bitte leer lassen)
               <input name="company_website" tabIndex={-1} autoComplete="off" value={form.company_website} onChange={handleChange} />
@@ -61,24 +61,24 @@ export default function SpeakerCvRequest() {
           </div>
 
           <div style={{ marginBottom: '16px' }}>
-            <label style={{ display: 'block', marginBottom: '6px', fontSize: '0.9rem' }}>Name</label>
+            <label htmlFor="speaker-name" style={{ display: 'block', marginBottom: '6px', fontSize: '0.9rem' }}>Name</label>
-            <input name="name" value={form.name} onChange={handleChange} style={inputStyle(errors.name)} />
+            <input id="speaker-name" name="name" value={form.name} onChange={handleChange} aria-invalid={Boolean(errors.name)} aria-describedby={errors.name ? 'speaker-name-error' : undefined} style={inputStyle(errors.name)} />
-            {errors.name && <p style={{ color: '#ff4444', fontSize: '0.85rem', margin: '4px 0 0' }}>{errors.name}</p>}
+            {errors.name && <p id="speaker-name-error" role="alert" style={{ color: '#ff4444', fontSize: '0.85rem', margin: '4px 0 0' }}>{errors.name}</p>}
           </div>
 
           <div style={{ marginBottom: '16px' }}>
-            <label style={{ display: 'block', marginBottom: '6px', fontSize: '0.9rem' }}>E-Mail</label>
+            <label htmlFor="speaker-email" style={{ display: 'block', marginBottom: '6px', fontSize: '0.9rem' }}>E-Mail</label>
-            <input name="email" type="email" value={form.email} onChange={handleChange} style={inputStyle(errors.email)} />
+            <input id="speaker-email" name="email" type="email" value={form.email} onChange={handleChange} aria-invalid={Boolean(errors.email)} aria-describedby={errors.email ? 'speaker-email-error' : undefined} style={inputStyle(errors.email)} />
-            {errors.email && <p style={{ color: '#ff4444', fontSize: '0.85rem', margin: '4px 0 0' }}>{errors.email}</p>}
+            {errors.email && <p id="speaker-email-error" role="alert" style={{ color: '#ff4444', fontSize: '0.85rem', margin: '4px 0 0' }}>{errors.email}</p>}
           </div>
 
           <div style={{ marginBottom: '20px' }}>
-            <label style={{ display: 'block', marginBottom: '6px', fontSize: '0.9rem' }}>Wer bist Du & warum?</label>
+            <label htmlFor="speaker-message" style={{ display: 'block', marginBottom: '6px', fontSize: '0.9rem' }}>Wer bist Du & warum?</label>
-            <textarea name="message" value={form.message} onChange={handleChange} rows={4} maxLength={2000} style={{ ...inputStyle(errors.message), resize: 'vertical' }} />
+            <textarea id="speaker-message" name="message" value={form.message} onChange={handleChange} rows={4} maxLength={2000} aria-invalid={Boolean(errors.message)} aria-describedby={errors.message ? 'speaker-message-error' : undefined} style={{ ...inputStyle(errors.message), resize: 'vertical' }} />
-            {errors.message && <p style={{ color: '#ff4444', fontSize: '0.85rem', margin: '4px 0 0' }}>{errors.message}</p>}
+            {errors.message && <p id="speaker-message-error" role="alert" style={{ color: '#ff4444', fontSize: '0.85rem', margin: '4px 0 0' }}>{errors.message}</p>}
           </div>
 
-          {serverError && <p style={{ color: '#ff4444', marginBottom: '16px' }}>{serverError}</p>}
+          {serverError && <p role="alert" aria-live="assertive" style={{ color: '#ff4444', marginBottom: '16px' }}>{serverError}</p>}
 
           <div style={{ display: 'flex', gap: '12px' }}>
             <button type="submit" className="primary-button" disabled={loading}>

privat/CV/andreknie.de/src/components/StatsCube.css

@@ -43,6 +43,13 @@
   100% { transform: rotateY(-360deg); }
 }
 
+@media (prefers-reduced-motion: reduce) {
+  .cube-container {
+    animation: none;
+    transform: rotateY(0deg);
+  }
+}
+
 .cube-stat-value {
   font-size: 3.5rem;
   font-weight: var(--font-weight-bold);

privat/CV/andreknie.de/src/components/TestimonialSlider.css

@@ -45,6 +45,12 @@
   -ms-overflow-style: none; /* IE/Edge */
 }
 
+.testimonial-scroll-container:focus-visible,
+.testimonial-nav-button:focus-visible {
+  outline: 2px solid var(--accent-color);
+  outline-offset: 4px;
+}
+
 .testimonial-scroll-container.dragging {
   cursor: grabbing;
   scroll-snap-type: none;

privat/CV/andreknie.de/src/components/TestimonialSlider.jsx

@@ -1,4 +1,4 @@
-import React, { useLayoutEffect, useRef, useState } from 'react'
+import React, { useEffect, useLayoutEffect, useRef, useState } from 'react'
 import { ChevronLeft, ChevronRight } from 'lucide-react'
 import './TestimonialSlider.css'
 
@@ -12,7 +12,9 @@ const MIDDLE_SET = Math.floor(LOOP_SETS / 2)
 export default function TestimonialSlider({ testimonials = [] }) {
   const scrollerRef = useRef(null)
   const dragStateRef = useRef({ isDragging: false, startX: 0, scrollLeft: 0 })
+  const recenterTimerRef = useRef(null)
   const [isDragging, setIsDragging] = useState(false)
+  const [activeIndex, setActiveIndex] = useState(0)
   const canLoop = testimonials.length > 1
   const visibleTestimonials = canLoop
     ? Array.from({ length: LOOP_SETS }, () => testimonials).flat()
@@ -46,10 +48,12 @@ export default function TestimonialSlider({ testimonials = [] }) {
   const centerCard = (cardIndex, behavior = 'auto') => {
     const scroller = scrollerRef.current
     if (!scroller) return
+    const normalizedIndex = ((cardIndex % testimonials.length) + testimonials.length) % testimonials.length
+    setActiveIndex(normalizedIndex)
 
     scroller.scrollTo({
       left: getCenteredScrollLeft(cardIndex),
-      behavior,
+      behavior: window.matchMedia('(prefers-reduced-motion: reduce)').matches ? 'auto' : behavior,
     })
   }
 
@@ -67,6 +71,8 @@ export default function TestimonialSlider({ testimonials = [] }) {
     return () => window.cancelAnimationFrame(frameId)
   }, [canLoop, testimonials.length])
 
+  useEffect(() => () => window.clearTimeout(recenterTimerRef.current), [])
+
   const scrollByCard = (direction) => {
     const scroller = scrollerRef.current
     if (!scroller) return
@@ -74,7 +80,8 @@ export default function TestimonialSlider({ testimonials = [] }) {
     const targetIndex = getClosestCardIndex() + direction
     centerCard(targetIndex, 'smooth')
 
-    window.setTimeout(recenterIfNeeded, 450)
+    window.clearTimeout(recenterTimerRef.current)
+    recenterTimerRef.current = window.setTimeout(recenterIfNeeded, 450)
   }
 
   const recenterIfNeeded = () => {
@@ -82,11 +89,12 @@ export default function TestimonialSlider({ testimonials = [] }) {
     if (!canLoop || !scroller) return
 
     const currentIndex = getClosestCardIndex()
+    const normalizedIndex = ((currentIndex % testimonials.length) + testimonials.length) % testimonials.length
+    setActiveIndex(normalizedIndex)
     const lowBoundary = testimonials.length
     const highBoundary = testimonials.length * (LOOP_SETS - 1)
     if (currentIndex >= lowBoundary && currentIndex < highBoundary) return
 
-    const normalizedIndex = ((currentIndex % testimonials.length) + testimonials.length) % testimonials.length
     centerCard(testimonials.length * MIDDLE_SET + normalizedIndex)
   }
 
@@ -123,10 +131,21 @@ export default function TestimonialSlider({ testimonials = [] }) {
     }
   }
 
+  const handleKeyDown = (event) => {
+    if (event.key === 'ArrowLeft') {
+      event.preventDefault()
+      scrollByCard(-1)
+    } else if (event.key === 'ArrowRight') {
+      event.preventDefault()
+      scrollByCard(1)
+    }
+  }
+
   if (testimonials.length === 0) return null
 
   return (
-    <section className="testimonials-section app-container">
+    <section className="testimonials-section app-container" aria-labelledby="testimonials-heading">
+      <h2 id="testimonials-heading" className="sr-only">Testimonials</h2>
       <div className="testimonial-slider-controls" aria-label="Testimonials wechseln">
         <button type="button" className="testimonial-nav-button" onClick={() => scrollByCard(-1)} aria-label="Vorheriges Testimonial">
           <ChevronLeft size={22} aria-hidden="true" />
@@ -135,9 +154,17 @@ export default function TestimonialSlider({ testimonials = [] }) {
           <ChevronRight size={22} aria-hidden="true" />
         </button>
       </div>
+      <p className="sr-only" role="status" aria-live="polite">
+        Testimonial {activeIndex + 1} von {testimonials.length}
+      </p>
       <div
         className={`testimonial-scroll-container${isDragging ? ' dragging' : ''}`}
         ref={scrollerRef}
+        role="region"
+        aria-label={`Testimonial ${testimonials.length > 1 ? 'Karussell' : ''}`}
+        aria-roledescription="Karussell"
+        tabIndex="0"
+        onKeyDown={handleKeyDown}
         onPointerDown={handlePointerDown}
         onPointerMove={handlePointerMove}
         onPointerUp={stopDragging}
@@ -147,7 +174,7 @@ export default function TestimonialSlider({ testimonials = [] }) {
         }}
       >
         {visibleTestimonials.map((current, i) => (
-          <div className="testimonial-card glass-panel" key={`${current.name}-${i}`}>
+          <div className="testimonial-card glass-panel" key={`${current.name}-${i}`} aria-hidden={canLoop && Math.floor(i / testimonials.length) !== MIDDLE_SET}>
             <div className="testimonial-quote">
               <span className="quote-mark">"</span>
               <p>{current.quote}</p>

privat/CV/andreknie.de/src/components/TestimonialSlider.test.jsx

@@ -0,0 +1,17 @@
+import React from 'react'
+import { describe, expect, it } from 'vitest'
+import { render, screen } from '@testing-library/react'
+import TestimonialSlider from './TestimonialSlider'
+
+describe('TestimonialSlider accessibility', () => {
+  it('exposes only one logical testimonial set', () => {
+    const testimonials = [
+      { name: 'Person A', quote: 'Zitat A', role: 'Rolle A' },
+      { name: 'Person B', quote: 'Zitat B', role: 'Rolle B' },
+      { name: 'Person C', quote: 'Zitat C', role: 'Rolle C' },
+    ]
+    const { container } = render(<TestimonialSlider testimonials={testimonials} />)
+    expect(container.querySelectorAll('.testimonial-card:not([aria-hidden="true"])')).toHaveLength(3)
+    expect(screen.getByRole('status').textContent).toContain('Testimonial 1 von 3')
+  })
+})

privat/CV/andreknie.de/src/components/seo.js

@@ -0,0 +1,16 @@
+export const SITE_URL = 'https://andreknie.de'
+export const BRAND_SUFFIX = ' | Dr. André Knie'
+export const DEFAULT_TITLE = 'Dr. André Knie – Digitale Souveränität und KI'
+export const DEFAULT_DESCRIPTION = 'Dr. André Knie unterstützt Organisationen dabei, digitale Souveränität zu erlangen und sicher von KI zu profitieren.'
+export const DEFAULT_IMAGE = '/images/andre-knie.webp'
+
+export function absoluteUrl(value, fallback) {
+  const candidate = value || fallback
+  if (/^https?:\/\//i.test(candidate)) return candidate
+  return new URL(candidate.startsWith('/') ? candidate : `/${candidate}`, SITE_URL).href
+}
+
+export function normalizeTitle(title) {
+  if (!title) return DEFAULT_TITLE
+  return title.endsWith(BRAND_SUFFIX) ? title.slice(0, -BRAND_SUFFIX.length) : title
+}

privat/CV/andreknie.de/src/hooks/useContent.js

@@ -1,4 +1,8 @@
+import { useEffect, useState } from 'react'
 import content from 'virtual:content'
+import detailLoaders from 'virtual:content-detail-loaders'
+
+const detailCache = new Map()
 
 /**
  * Get all content of a given type, sorted by date descending.
@@ -50,8 +54,36 @@ export function useContent(type, options = {}) {
  * Get a single content item by slug.
  */
 export function useContentItem(type, slug) {
-  const items = content[type] || []
+  const metadata = (content[type] || []).find(item => item.slug === slug) || null
-  return items.find(item => item.slug === slug) || null
+  const cacheKey = `${type}:${slug}`
+  const [detailState, setDetailState] = useState(() => ({
+    key: cacheKey,
+    item: detailCache.get(cacheKey) || metadata,
+  }))
+
+  useEffect(() => {
+    let active = true
+    if (!metadata || detailCache.has(cacheKey)) return () => { active = false }
+
+    const loadDetail = detailLoaders[type]?.[slug]
+    const detailPromise = loadDetail
+      ? loadDetail()
+      : Promise.reject(new Error(`No detail loader for ${cacheKey}`))
+
+    detailPromise
+      .then(module => {
+        const detail = module.default
+        detailCache.set(cacheKey, detail)
+        if (active) setDetailState({ key: cacheKey, item: detail })
+      })
+      .catch(() => {
+        if (active) setDetailState({ key: cacheKey, item: { ...metadata, detailError: true } })
+      })
+
+    return () => { active = false }
+  }, [cacheKey, metadata, slug, type])
+
+  return detailState.key === cacheKey ? detailState.item : metadata
 }
 
 /**

privat/CV/andreknie.de/src/index.css

@@ -42,6 +42,9 @@
   --radius-md: 16px;
   --radius-lg: 24px;
   --radius-pill: 50px;
+
+  /* Space reserved for the fixed mobile navigation dock. */
+  --dock-content-space: 0px;
 }
 
 /* ==========================================================================
@@ -65,6 +68,13 @@ body {
   font-weight: var(--font-weight-normal);
   line-height: 1.6;
   overflow-x: hidden;
+  padding-bottom: var(--dock-content-space);
+}
+
+@media (max-width: 600px) {
+  :root {
+    --dock-content-space: calc(88px + env(safe-area-inset-bottom));
+  }
 }
 
 h1, h2, h3, h4, h5, h6 {
@@ -153,6 +163,34 @@ img {
   color: var(--accent-color);
 }
 
+.page-loading {
+  min-height: 50vh;
+  display: grid;
+  place-items: center;
+  padding: 120px 24px 80px;
+  color: var(--text-secondary);
+}
+
+.sr-only {
+  position: absolute;
+  width: 1px;
+  height: 1px;
+  padding: 0;
+  margin: -1px;
+  overflow: hidden;
+  clip: rect(0, 0, 0, 0);
+  white-space: nowrap;
+  border: 0;
+}
+
+button:focus-visible,
+input:focus-visible,
+textarea:focus-visible,
+select:focus-visible {
+  outline: 2px solid var(--accent-color);
+  outline-offset: 3px;
+}
+
 /* Section layout */
 .section-header {
   text-align: center;
@@ -194,3 +232,13 @@ img {
   0% { opacity: 0; }
   100% { opacity: 1; }
 }
+
+@media (prefers-reduced-motion: reduce) {
+  html { scroll-behavior: auto; }
+  *, *::before, *::after {
+    animation-duration: 0.001ms !important;
+    animation-iteration-count: 1 !important;
+    scroll-behavior: auto !important;
+    transition-duration: 0.001ms !important;
+  }
+}

privat/CV/andreknie.de/src/pages/About.jsx

@@ -2,6 +2,7 @@ import React from 'react'
 import { useMeta } from '../hooks/useContent'
 import { ExternalLink, Globe } from 'lucide-react'
 import SpeakerCvRequest from '../components/SpeakerCvRequest'
+import SEOHead from '../components/SEOHead'
 
 export default function About() {
   const { profile, about } = useMeta()
@@ -12,6 +13,7 @@ export default function About() {
 
   return (
     <main style={{ paddingTop: '120px', minHeight: '100vh' }}>
+      <SEOHead title="Über mich" description="Über Dr. André Knie, seine Arbeit, Stationen und Perspektive auf KI und digitale Souveränität." url="/ueber-mich" />
       <div className="app-container" style={{ maxWidth: '800px' }}>
         <div className="section-header">
           <h1 className="section-title">Über <span className="text-gradient">mich</span></h1>

privat/CV/andreknie.de/src/pages/ArticleSingle.jsx

@@ -1,20 +1,37 @@
 import React from 'react'
 import { useParams, Link } from 'react-router-dom'
-import { useContent } from '../hooks/useContent'
+import { useContentItem } from '../hooks/useContent'
 import SEOHead from '../components/SEOHead'
 import { decodeHtml } from '../utils/decodeHtml'
 
 export default function ArticleSingle() {
   const { slug } = useParams()
-  const { items: posts } = useContent('posts', { pageSize: 1000 })
+  const post = useContentItem('posts', slug)
-  const post = posts.find((p) => p.slug === slug)
 
   if (!post) {
     return (
-      <div className="page-container app-container" style={{ textAlign: 'center', paddingTop: '150px' }}>
+      <main className="page-container app-container" style={{ textAlign: 'center', paddingTop: '150px' }}>
-        <h2>Artikel nicht gefunden</h2>
+        <SEOHead
+          title="Artikel nicht gefunden"
+          description="Der angeforderte Artikel wurde nicht gefunden."
+          url={`/artikel/${slug}`}
+          noindex
+        />
+        <h1>Artikel nicht gefunden</h1>
         <Link to="/artikel" className="primary-button" style={{ marginTop: '20px' }}>Zurück zur Übersicht</Link>
-      </div>
+      </main>
+    )
+  }
+
+  if (!post.body) {
+    const loadFailed = post.detailError
+    return (
+      <main className="page-container app-container" style={{ textAlign: 'center', paddingTop: '150px' }}>
+        <SEOHead title={post.title} description={post.excerpt || post.title} url={`/artikel/${post.slug}`} type="article" />
+        <p role={loadFailed ? 'alert' : 'status'} aria-live={loadFailed ? 'assertive' : 'polite'}>
+          {loadFailed ? 'Der Artikel konnte nicht geladen werden.' : 'Artikel wird geladen …'}
+        </p>
+      </main>
     )
   }
 
@@ -23,9 +40,11 @@ export default function ArticleSingle() {
     : ''
 
   return (
-    <div className="page-container article-single-page">
+    <main className="page-container article-single-page">
-      <SEOHead 
+      <SEOHead
-        title={`${post.title} | Dr. André Knie`} 
+        url={`/artikel/${post.slug}`}
+        type="article"
+        title={post.title}
         description={post.excerpt || post.title}
       />
       <div className="app-container" style={{ maxWidth: '800px', margin: '0 auto', paddingTop: '120px' }}>
@@ -48,6 +67,6 @@ export default function ArticleSingle() {
           />
         </article>
       </div>
-    </div>
+    </main>
   )
 }

privat/CV/andreknie.de/src/pages/Articles.jsx

@@ -15,14 +15,15 @@ export default function Articles() {
     return (
       (post.title && post.title.toLowerCase().includes(query)) ||
       (post.excerpt && post.excerpt.toLowerCase().includes(query)) ||
-      (post.body && post.body.toLowerCase().includes(query))
+      (post.searchText && post.searchText.toLowerCase().includes(query))
     )
   })
 
   return (
-    <div className="page-container articles-page">
+    <main className="page-container articles-page">
-      <SEOHead 
+      <SEOHead
-        title="Artikel & Beiträge | Dr. André Knie" 
+        url="/artikel"
+        title="Artikel & Beiträge"
         description="Aktuelle Artikel und LinkedIn-Beiträge zu den Themen Softwareentwicklung, Leadership und Technologie."
       />
       <header className="page-header">
@@ -44,6 +45,7 @@ export default function Articles() {
           <input 
             type="text" 
             placeholder="Artikel durchsuchen..." 
+            aria-label="Artikel durchsuchen"
             value={searchQuery}
             onChange={(e) => setSearchQuery(e.target.value)}
             style={{ 
@@ -83,7 +85,7 @@ export default function Articles() {
               )}
               <h2 className="article-title">{decodeHtml(post.title)}</h2>
               <p className="article-excerpt">
-                {decodeHtml(post.excerpt || (post.body ? post.body.replace(/<[^>]+>/g, '').substring(0, 150) + '...' : ''))}
+                {decodeHtml(post.excerpt || (post.searchText ? post.searchText.substring(0, 150) + '...' : ''))}
               </p>
               <div style={{ display: 'flex', gap: '16px' }}>
                 <a href={`/artikel/${post.slug}`} className="article-link">
@@ -102,6 +104,6 @@ export default function Articles() {
           <p className="no-articles">Keine Artikel für diese Suche gefunden.</p>
         )}
       </section>
-    </div>
+    </main>
   )
 }

privat/CV/andreknie.de/src/pages/Confirmation.jsx

@@ -13,6 +13,8 @@ export default function Confirmation() {
       <SEOHead 
         title={isSuccess ? "Vielen Dank" : "Ein Fehler ist aufgetreten"} 
         description={isSuccess ? "Ihre Nachricht wurde erfolgreich gesendet." : "Es gab ein Problem beim Senden Ihrer Nachricht."}
+        url="/bestaetigung"
+        noindex
       />
       <main style={{ paddingTop: '120px', minHeight: '100vh', display: 'flex', alignItems: 'center', justifyContent: 'center' }}>
         <div className="app-container" style={{ textAlign: 'center', maxWidth: '600px' }}>

privat/CV/andreknie.de/src/pages/Consulting.jsx

@@ -1,6 +1,7 @@
 import React from 'react'
 import { useContent, useMeta } from '../hooks/useContent'
 import ServiceAccordion from '../components/ServiceAccordion'
+import SEOHead from '../components/SEOHead'
 
 export default function Consulting() {
   const { items } = useContent('consulting', { pageSize: 10 })
@@ -8,6 +9,7 @@ export default function Consulting() {
 
   return (
     <main style={{ paddingTop: '120px', minHeight: '100vh' }}>
+      <SEOHead title="Beratung" description="Beratung zu KI-Strategie, digitaler Souveränität und praktischer Transformation." url="/consulting" />
       <div className="app-container">
         <div className="section-header">
           <h1 className="section-title"><span className="text-gradient">Leistungen</span></h1>

privat/CV/andreknie.de/src/pages/Contact.jsx

@@ -1,6 +1,7 @@
 import React, { useState } from 'react'
 import { useFormSubmit } from '../hooks/useFormSubmit'
 import { validateContact } from '../utils/validation'
+import SEOHead from '../components/SEOHead'
 
 export default function Contact() {
   const [form, setForm] = useState({ name: '', email: '', message: '', company_website: '' })
@@ -18,8 +19,11 @@ export default function Contact() {
   if (success) {
     return (
       <main style={{ paddingTop: '120px', minHeight: '100vh' }}>
+        <SEOHead title="Kontakt" description="Nimm Kontakt zu Dr. André Knie auf." url="/kontakt" />
         <div className="app-container" style={{ textAlign: 'center', maxWidth: '600px' }}>
-          <h1 style={{ marginBottom: '16px' }}>Nachricht gesendet</h1>
+          <div role="status" aria-live="polite">
+            <h1 style={{ marginBottom: '16px' }}>Nachricht gesendet</h1>
+          </div>
           <p style={{ color: 'var(--text-secondary)' }}>Du erhältst eine Bestätigungs-E-Mail. Bitte klicke den Link darin, damit deine Nachricht weitergeleitet wird.</p>
         </div>
       </main>
@@ -28,6 +32,7 @@ export default function Contact() {
 
   return (
     <main style={{ paddingTop: '120px', minHeight: '100vh' }}>
+      <SEOHead title="Kontakt" description="Nimm Kontakt zu Dr. André Knie auf." url="/kontakt" />
       <div className="app-container" style={{ maxWidth: '600px' }}>
         <div className="section-header">
           <h1 className="section-title"><span className="text-gradient">Kontakt</span></h1>
@@ -36,7 +41,7 @@ export default function Contact() {
 
         <form onSubmit={handleSubmit} className="glass-panel" style={{ padding: '40px' }}>
           {/* Honeypot — hidden from real users, only bots fill this. */}
-          <div aria-hidden="true" style={{ position: 'absolute', left: '-9999px', width: '1px', height: '1px', overflow: 'hidden' }}>
+          <div hidden>
             <label>
               Firmen-Website (bitte leer lassen)
               <input name="company_website" tabIndex={-1} autoComplete="off" value={form.company_website} onChange={handleChange} />
@@ -44,25 +49,25 @@ export default function Contact() {
           </div>
 
           <div style={{ marginBottom: '20px' }}>
-            <label style={{ display: 'block', marginBottom: '6px', fontSize: '0.9rem' }}>Name</label>
+            <label htmlFor="contact-name" style={{ display: 'block', marginBottom: '6px', fontSize: '0.9rem' }}>Name</label>
-            <input name="name" value={form.name} onChange={handleChange} style={{ width: '100%', padding: '12px', background: 'var(--bg-elevated)', border: errors.name ? '1px solid #ff4444' : '1px solid var(--glass-border)', borderRadius: 'var(--radius-sm)', color: 'var(--text-primary)', fontSize: '1rem' }} />
+            <input id="contact-name" name="name" value={form.name} onChange={handleChange} aria-invalid={Boolean(errors.name)} aria-describedby={errors.name ? 'contact-name-error' : undefined} style={{ width: '100%', padding: '12px', background: 'var(--bg-elevated)', border: errors.name ? '1px solid #ff4444' : '1px solid var(--glass-border)', borderRadius: 'var(--radius-sm)', color: 'var(--text-primary)', fontSize: '1rem' }} />
-            {errors.name && <p style={{ color: '#ff4444', fontSize: '0.85rem', margin: '4px 0 0' }}>{errors.name}</p>}
+            {errors.name && <p id="contact-name-error" role="alert" style={{ color: '#ff4444', fontSize: '0.85rem', margin: '4px 0 0' }}>{errors.name}</p>}
           </div>
 
           <div style={{ marginBottom: '20px' }}>
-            <label style={{ display: 'block', marginBottom: '6px', fontSize: '0.9rem' }}>E-Mail</label>
+            <label htmlFor="contact-email" style={{ display: 'block', marginBottom: '6px', fontSize: '0.9rem' }}>E-Mail</label>
-            <input name="email" type="email" value={form.email} onChange={handleChange} style={{ width: '100%', padding: '12px', background: 'var(--bg-elevated)', border: errors.email ? '1px solid #ff4444' : '1px solid var(--glass-border)', borderRadius: 'var(--radius-sm)', color: 'var(--text-primary)', fontSize: '1rem' }} />
+            <input id="contact-email" name="email" type="email" value={form.email} onChange={handleChange} aria-invalid={Boolean(errors.email)} aria-describedby={errors.email ? 'contact-email-error' : undefined} style={{ width: '100%', padding: '12px', background: 'var(--bg-elevated)', border: errors.email ? '1px solid #ff4444' : '1px solid var(--glass-border)', borderRadius: 'var(--radius-sm)', color: 'var(--text-primary)', fontSize: '1rem' }} />
-            {errors.email && <p style={{ color: '#ff4444', fontSize: '0.85rem', margin: '4px 0 0' }}>{errors.email}</p>}
+            {errors.email && <p id="contact-email-error" role="alert" style={{ color: '#ff4444', fontSize: '0.85rem', margin: '4px 0 0' }}>{errors.email}</p>}
           </div>
 
           <div style={{ marginBottom: '24px' }}>
-            <label style={{ display: 'block', marginBottom: '6px', fontSize: '0.9rem' }}>Nachricht</label>
+            <label htmlFor="contact-message" style={{ display: 'block', marginBottom: '6px', fontSize: '0.9rem' }}>Nachricht</label>
-            <textarea name="message" value={form.message} onChange={handleChange} rows={6} maxLength={2000} style={{ width: '100%', padding: '12px', background: 'var(--bg-elevated)', border: errors.message ? '1px solid #ff4444' : '1px solid var(--glass-border)', borderRadius: 'var(--radius-sm)', color: 'var(--text-primary)', fontSize: '1rem', resize: 'vertical' }} />
+            <textarea id="contact-message" name="message" value={form.message} onChange={handleChange} rows={6} maxLength={2000} aria-invalid={Boolean(errors.message)} aria-describedby={errors.message ? 'contact-message-error' : undefined} style={{ width: '100%', padding: '12px', background: 'var(--bg-elevated)', border: errors.message ? '1px solid #ff4444' : '1px solid var(--glass-border)', borderRadius: 'var(--radius-sm)', color: 'var(--text-primary)', fontSize: '1rem', resize: 'vertical' }} />
-            {errors.message && <p style={{ color: '#ff4444', fontSize: '0.85rem', margin: '4px 0 0' }}>{errors.message}</p>}
+            {errors.message && <p id="contact-message-error" role="alert" style={{ color: '#ff4444', fontSize: '0.85rem', margin: '4px 0 0' }}>{errors.message}</p>}
             <p style={{ color: 'var(--text-secondary)', fontSize: '0.8rem', margin: '4px 0 0' }}>{form.message.length}/2000</p>
           </div>
 
-          {serverError && <p style={{ color: '#ff4444', marginBottom: '16px' }}>{serverError}</p>}
+          {serverError && <p role="alert" aria-live="assertive" style={{ color: '#ff4444', marginBottom: '16px' }}>{serverError}</p>}
 
           <button type="submit" className="primary-button" disabled={loading} style={{ width: '100%' }}>
             {loading ? 'Wird gesendet...' : 'Nachricht senden'}

privat/CV/andreknie.de/src/pages/Datenschutz.jsx

@@ -1,8 +1,10 @@
 import React from 'react'
+import SEOHead from '../components/SEOHead'
 
 export default function Datenschutz() {
   return (
     <main style={{ paddingTop: '120px', minHeight: '100vh' }}>
+      <SEOHead title="Datenschutz" description="Datenschutzerklärung von andreknie.de." url="/datenschutz" />
       <div className="app-container" style={{ maxWidth: '700px' }}>
         <h1 style={{ marginBottom: '32px' }}>Datenschutzerklärung</h1>
         <div style={{ color: 'var(--text-secondary)', lineHeight: 1.8 }}>
@@ -24,8 +26,8 @@ export default function Datenschutz() {
           <p><strong style={{ color: 'var(--text-primary)' }}>4. Newsletter (Double-Opt-In)</strong></p>
           <p>Für die Newsletter-Anmeldung wird Ihre E-Mail-Adresse bis zur Bestätigung temporär gespeichert. Nach erfolgreicher Bestätigung wird sie als aktives Abonnement gespeichert, bis Sie sich abmelden. Eine Abmeldung können Sie jederzeit per E-Mail an <a href="mailto:kontakt@d-hive.de">kontakt@d-hive.de</a> mit dem Hinweis „Newsletter abbestellen“ veranlassen.</p>
 
-          <p><strong style={{ color: 'var(--text-primary)' }}>5. Ressourcen-Downloads</strong></p>
+          <p><strong style={{ color: 'var(--text-primary)' }}>5. Ressourcenanfragen</strong></p>
-          <p>Für einen Ressourcen-Download werden Name, E-Mail-Adresse, Unternehmen, angeforderte Ressource und Zeitpunkt gespeichert. Die Daten dienen der Bearbeitung der Download-Anfrage und der Beziehungspflege. Sie werden gelöscht, sobald der Zweck entfällt oder Sie die Löschung unter <a href="mailto:datenschutz@d-hive.de">datenschutz@d-hive.de</a> anfordern.</p>
+          <p>Für eine Ressourcenanfrage werden Name, E-Mail-Adresse, Unternehmen und die angeforderte Ressource ausschließlich an <a href="mailto:kontakt@d-hive.de">kontakt@d-hive.de</a> übermittelt. Es erfolgt kein automatischer Download und kein automatischer Versand. Die Anfrage dient der Prüfung, ob André ein aktuelles Profil verschickt. Eine lokale Lead-Datei wird dabei nicht angelegt.</p>
 
           <p><strong style={{ color: 'var(--text-primary)' }}>6. Speaker-CV-Anfrage</strong></p>
           <p>Für die Speaker-CV-Anfrage werden Name, E-Mail-Adresse, Nachricht und Zeitpunkt gespeichert. Die Daten werden nach erfolgreichem Versand des CV zur Bearbeitung und Beziehungspflege gespeichert und gelöscht, sobald der Zweck entfällt oder Sie die Löschung unter <a href="mailto:datenschutz@d-hive.de">datenschutz@d-hive.de</a> anfordern.</p>

privat/CV/andreknie.de/src/pages/Home.css

@@ -12,6 +12,46 @@
   box-sizing: border-box;
 }
 
+@media (max-width: 600px) {
+  .hero {
+    padding-top: 100px;
+    padding-bottom: calc(60px + var(--dock-content-space));
+  }
+
+  .hero-photo {
+    width: 140px;
+    height: 140px;
+    margin-bottom: 16px;
+  }
+
+  .hero h1 {
+    font-size: 2.25rem;
+    margin-bottom: 8px;
+  }
+
+  .hero-roles {
+    font-size: 1rem;
+    margin-bottom: 12px;
+  }
+
+  .hero-subtext {
+    font-size: 1rem;
+    line-height: 1.45;
+    margin-bottom: 24px;
+  }
+
+  .hero-actions {
+    flex-wrap: nowrap;
+    gap: 10px;
+  }
+
+  .hero-actions .primary-button,
+  .hero-actions .secondary-button {
+    padding: 12px 18px;
+    font-size: 0.95rem;
+  }
+}
+
 .hero-content {
   position: relative;
   z-index: 10;

privat/CV/andreknie.de/src/pages/Home.jsx

@@ -6,6 +6,7 @@ import UpcomingEvents from '../components/UpcomingEvents'
 import StatsCube from '../components/StatsCube'
 import DotCloudIcon from '../components/DotCloudIcon'
 import PhotoBand from '../components/PhotoBand'
+import SEOHead from '../components/SEOHead'
 import './Home.css'
 
 const PHOTO_BAND_IMAGES = [
@@ -21,6 +22,7 @@ export default function Home() {
 
   return (
     <main>
+      <SEOHead url="/" />
       {/* Hero */}
       <section className="hero">
         <div className="app-container hero-content">

privat/CV/andreknie.de/src/pages/Impressum.jsx

@@ -1,8 +1,10 @@
 import React from 'react'
+import SEOHead from '../components/SEOHead'
 
 export default function Impressum() {
   return (
     <main style={{ paddingTop: '120px', minHeight: '100vh' }}>
+      <SEOHead title="Impressum" description="Impressum von andreknie.de." url="/impressum" />
       <div className="app-container" style={{ maxWidth: '700px' }}>
         <h1 style={{ marginBottom: '32px' }}>Impressum</h1>
         <div style={{ color: 'var(--text-secondary)', lineHeight: 1.8 }}>

privat/CV/andreknie.de/src/pages/Kniepunkt.jsx

@@ -4,6 +4,7 @@ import { Search } from 'lucide-react'
 import { useContent } from '../hooks/useContent'
 import { formatDate } from '../utils/formatDate'
 import { decodeHtml } from '../utils/decodeHtml'
+import SEOHead from '../components/SEOHead'
 
 export default function Kniepunkt() {
   const [searchQuery, setSearchQuery] = useState('')
@@ -15,12 +16,13 @@ export default function Kniepunkt() {
     return (
       (item.title && item.title.toLowerCase().includes(query)) ||
       (item.summary && item.summary.toLowerCase().includes(query)) ||
-      (item.body && item.body.toLowerCase().includes(query))
+      (item.searchText && item.searchText.toLowerCase().includes(query))
     )
   })
 
   return (
     <main style={{ paddingTop: '120px', minHeight: '100vh' }}>
+      <SEOHead title="Kniepunkt" description="Die Kniepunkt-Kolumne von Dr. André Knie über KI, Technologie und die Absurditäten des digitalen Wandels." url="/kniepunkt" />
       <div className="app-container">
         <div className="section-header">
           <h1 className="section-title"><span className="text-gradient">Kniepunkt</span></h1>
@@ -34,6 +36,7 @@ export default function Kniepunkt() {
           <input 
             type="text" 
             placeholder="Kniepunkte durchsuchen..." 
+            aria-label="Kniepunkte durchsuchen"
             value={searchQuery}
             onChange={(e) => setSearchQuery(e.target.value)}
             style={{ 

privat/CV/andreknie.de/src/pages/KniepunktIssue.jsx

@@ -2,6 +2,7 @@ import React from 'react'
 import { useParams, Link } from 'react-router-dom'
 import { useContentItem } from '../hooks/useContent'
 import { formatDate } from '../utils/formatDate'
+import SEOHead from '../components/SEOHead'
 
 export default function KniepunktIssue() {
   const { slug } = useParams()
@@ -10,6 +11,7 @@ export default function KniepunktIssue() {
   if (!issue) {
     return (
       <main style={{ paddingTop: '120px', minHeight: '100vh' }}>
+        <SEOHead title="Kniepunkt-Ausgabe nicht gefunden" description="Die angeforderte Kniepunkt-Ausgabe wurde nicht gefunden." noindex url={`/kniepunkt/${slug}`} />
         <div className="app-container" style={{ textAlign: 'center' }}>
           <h1>Ausgabe nicht gefunden</h1>
           <p style={{ color: 'var(--text-secondary)' }}>Diese Kniepunkt-Ausgabe existiert nicht.</p>
@@ -19,8 +21,23 @@ export default function KniepunktIssue() {
     )
   }
 
+  if (!issue.body) {
+    const loadFailed = issue.detailError
+    return (
+      <main style={{ paddingTop: '120px', minHeight: '100vh' }}>
+        <SEOHead title={issue.title} description={issue.summary || issue.title} url={`/kniepunkt/${issue.slug}`} type="article" image={issue.image} />
+        <div className="app-container" style={{ textAlign: 'center' }}>
+          <p role={loadFailed ? 'alert' : 'status'} aria-live={loadFailed ? 'assertive' : 'polite'}>
+            {loadFailed ? 'Die Kniepunkt-Ausgabe konnte nicht geladen werden.' : 'Kniepunkt-Ausgabe wird geladen …'}
+          </p>
+        </div>
+      </main>
+    )
+  }
+
   return (
     <main style={{ paddingTop: '120px', minHeight: '100vh' }}>
+      <SEOHead title={issue.title} description={issue.summary || issue.title} url={`/kniepunkt/${issue.slug}`} type="article" image={issue.image} />
       <div className="app-container" style={{ maxWidth: '700px' }}>
         <Link to="/kniepunkt" style={{ color: 'var(--text-secondary)', fontSize: '0.9rem', marginBottom: '24px', display: 'inline-block' }}>&larr; Alle Ausgaben</Link>
         <h1 style={{ marginBottom: '12px' }}>{issue.title}</h1>

privat/CV/andreknie.de/src/pages/NotFound.jsx

@@ -1,9 +1,11 @@
 import React from 'react'
 import { Link } from 'react-router-dom'
+import SEOHead from '../components/SEOHead'
 
 export default function NotFound() {
   return (
     <main style={{ paddingTop: '120px', minHeight: '100vh', display: 'flex', alignItems: 'center', justifyContent: 'center' }}>
+      <SEOHead title="Seite nicht gefunden" description="Die angeforderte Seite wurde nicht gefunden." noindex url="/404" />
       <div className="app-container" style={{ textAlign: 'center' }}>
         <h1 style={{ fontSize: '6rem', marginBottom: '16px' }}><span className="text-gradient">404</span></h1>
         <p style={{ color: 'var(--text-secondary)', fontSize: '1.2rem', marginBottom: '32px' }}>Diese Seite existiert nicht.</p>

privat/CV/andreknie.de/src/pages/Podcast.jsx

@@ -2,6 +2,7 @@ import React from 'react'
 import { useContent } from '../hooks/useContent'
 import { formatDate } from '../utils/formatDate'
 import { ExternalLink } from 'lucide-react'
+import SEOHead from '../components/SEOHead'
 
 export default function Podcast() {
   const { items: allEpisodes } = useContent('podcast', { visibility: 'all', pageSize: 100 })
@@ -13,6 +14,7 @@ export default function Podcast() {
 
   return (
     <main style={{ paddingTop: '120px', minHeight: '100vh' }}>
+      <SEOHead title="Podcast" description="Podcasts, Gastauftritte und Gespräche von und mit Dr. André Knie über KI, Transformation und Leadership." url="/podcast" />
       <div className="app-container" style={{ maxWidth: '800px', margin: '0 auto' }}>
         <div className="section-header">
           <h1 className="section-title"><span className="text-gradient">Podcast</span></h1>

privat/CV/andreknie.de/src/pages/Resources.jsx

@@ -1,29 +1,112 @@
-import React from 'react'
+import React, { useState } from 'react'
 import { useContent } from '../hooks/useContent'
+import { useFormSubmit } from '../hooks/useFormSubmit'
+import { validateResourceDownload } from '../utils/validation'
+import SEOHead from '../components/SEOHead'
+
+const inputStyle = {
+  width: '100%',
+  padding: '12px',
+  background: 'var(--bg-elevated)',
+  border: '1px solid var(--glass-border)',
+  borderRadius: 'var(--radius-sm)',
+  color: 'var(--text-primary)',
+  fontSize: '1rem',
+}
+
+function ResourceRequestForm({ resource, onCancel }) {
+  const resourceId = resource.id || resource.slug
+  const [form, setForm] = useState({ name: '', email: '', company: '', resource_id: resourceId, company_website: '' })
+  const { submit, loading, success, errors, serverError } = useFormSubmit('/api/resource-download', validateResourceDownload)
+
+  function updateField(event) {
+    setForm(prev => ({ ...prev, [event.target.name]: event.target.value }))
+  }
+
+  async function handleSubmit(event) {
+    event.preventDefault()
+    await submit(form)
+  }
+
+  return (
+    <div className="glass-panel" style={{ padding: '24px', marginTop: '24px' }}>
+      {success ? (
+        <p role="status" aria-live="polite" style={{ margin: 0, color: 'var(--text-primary)' }}>
+          Danke! Wir prüfen die Anfrage und melden uns bei dir.
+        </p>
+      ) : (
+        <form onSubmit={handleSubmit} noValidate>
+          <h2 style={{ fontSize: '1.25rem', marginBottom: '8px' }}>Material anfragen</h2>
+          <p style={{ color: 'var(--text-secondary)', marginTop: 0 }}>
+            Wir prüfen die Anfrage. Bei positiver Prüfung verschickt André ein aktuelles Profil persönlich.
+          </p>
+
+          <div hidden>
+            <label htmlFor="resource-company-website">Firmen-Website (bitte leer lassen)</label>
+            <input id="resource-company-website" name="company_website" tabIndex={-1} autoComplete="off" value={form.company_website} onChange={updateField} />
+          </div>
+
+          <input type="hidden" name="resource_id" value={resourceId} />
+
+          <label htmlFor="resource-name">Name</label>
+          <input id="resource-name" name="name" value={form.name} onChange={updateField} style={inputStyle} autoComplete="name" aria-invalid={Boolean(errors.name)} aria-describedby={errors.name ? 'resource-name-error' : undefined} />
+          {errors.name && <p id="resource-name-error" role="alert" style={{ color: '#ff4444', margin: '4px 0 12px' }}>{errors.name}</p>}
+
+          <label htmlFor="resource-email">E-Mail</label>
+          <input id="resource-email" name="email" type="email" value={form.email} onChange={updateField} style={inputStyle} autoComplete="email" aria-invalid={Boolean(errors.email)} aria-describedby={errors.email ? 'resource-email-error' : undefined} />
+          {errors.email && <p id="resource-email-error" role="alert" style={{ color: '#ff4444', margin: '4px 0 12px' }}>{errors.email}</p>}
+
+          <label htmlFor="resource-company">Unternehmen</label>
+          <input id="resource-company" name="company" value={form.company} onChange={updateField} style={inputStyle} autoComplete="organization" aria-invalid={Boolean(errors.company)} aria-describedby={errors.company ? 'resource-company-error' : undefined} />
+          {errors.company && <p id="resource-company-error" role="alert" style={{ color: '#ff4444', margin: '4px 0 12px' }}>{errors.company}</p>}
+
+          {serverError && <p role="alert" aria-live="assertive" style={{ color: '#ff4444' }}>{serverError}</p>}
+          {errors.resource_id && <p role="alert" style={{ color: '#ff4444' }}>{errors.resource_id}</p>}
+
+          <div style={{ display: 'flex', gap: '12px', marginTop: '20px', flexWrap: 'wrap' }}>
+            <button type="submit" className="primary-button" disabled={loading}>
+              {loading ? 'Wird gesendet...' : 'Anfrage senden'}
+            </button>
+            <button type="button" className="secondary-button" onClick={onCancel}>Abbrechen</button>
+          </div>
+        </form>
+      )}
+    </div>
+  )
+}
 
 export default function Resources() {
   const { items } = useContent('resources', { pageSize: 20 })
+  const [selectedResource, setSelectedResource] = useState(null)
 
   return (
     <main style={{ paddingTop: '120px', minHeight: '100vh' }}>
+      <SEOHead title="Ressourcen" description="Ausgewählte Materialien und Profile von Dr. André Knie auf Anfrage." url="/resources" />
       <div className="app-container">
         <div className="section-header">
           <h1 className="section-title"><span className="text-gradient">Ressourcen</span></h1>
-          <p className="section-subtitle">Praktische Materialien zum Download.</p>
+          <p className="section-subtitle">Materialien auf Anfrage. Jede Anfrage wird zunächst geprüft.</p>
         </div>
 
         <div style={{ display: 'grid', gap: '20px', maxWidth: '700px', margin: '0 auto' }}>
-          {items.map(res => (
+          {items.map(resource => {
-            <div key={res.id || res.slug} className="glass-panel" style={{ padding: '24px', display: 'flex', justifyContent: 'space-between', alignItems: 'center', gap: '16px' }}>
+            const resourceId = resource.id || resource.slug
-              <div>
+            const selected = selectedResource === resourceId
-                <h3 style={{ marginBottom: '4px', fontSize: '1.1rem' }}>{res.title}</h3>
+            return (
-                <p style={{ color: 'var(--text-secondary)', margin: 0, fontSize: '0.9rem' }}>{res.description}</p>
+              <div key={resourceId} className="glass-panel" style={{ padding: '24px' }}>
+                <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', gap: '16px', flexWrap: 'wrap' }}>
+                  <div>
+                    <h2 style={{ marginBottom: '4px', fontSize: '1.1rem' }}>{resource.title}</h2>
+                    <p style={{ color: 'var(--text-secondary)', margin: 0, fontSize: '0.9rem' }}>{resource.description}</p>
+                  </div>
+                  <button type="button" className="primary-button" onClick={() => setSelectedResource(selected ? null : resourceId)} style={{ padding: '10px 20px', fontSize: '0.9rem', whiteSpace: 'nowrap' }}>
+                    {selected ? 'Schließen' : 'Material anfragen'}
+                  </button>
+                </div>
+                {selected && <ResourceRequestForm key={resourceId} resource={resource} onCancel={() => setSelectedResource(null)} />}
               </div>
-              <button className="primary-button" style={{ padding: '10px 20px', fontSize: '0.9rem', whiteSpace: 'nowrap' }}>
+            )
-                Download
+          })}
-              </button>
-            </div>
-          ))}
           {items.length === 0 && <p style={{ textAlign: 'center', color: 'var(--text-secondary)' }}>Ressourcen werden vorbereitet.</p>}
         </div>
       </div>

privat/CV/andreknie.de/src/pages/Speaking.jsx

@@ -1,6 +1,7 @@
 import React from 'react'
 import { useContent, useMeta } from '../hooks/useContent'
 import SpeakingAccordion from '../components/SpeakingAccordion'
+import SEOHead from '../components/SEOHead'
 
 export default function Speaking() {
   const { items: allTalks } = useContent('talks', { visibility: 'all', pageSize: 100 })
@@ -9,6 +10,7 @@ export default function Speaking() {
 
   return (
     <main style={{ paddingTop: '120px', minHeight: '100vh' }}>
+      <SEOHead title="Speaking" description="Keynotes, Workshops und Panels von Dr. André Knie zu KI, Transformation und Leadership." url="/speaking" />
       <div className="app-container">
         <div className="section-header">
           <h1 className="section-title"><span className="text-gradient">Speaking</span></h1>

privat/CV/andreknie.de/src/utils/validation.js

@@ -41,6 +41,6 @@ export function validateResourceDownload(data) {
   if (!data.email || !validateEmail(data.email)) errors.email = 'Gültige E-Mail-Adresse erforderlich.'
   if (!data.company || data.company.trim().length === 0) errors.company = 'Unternehmen ist erforderlich.'
   if (data.company && data.company.length > 150) errors.company = 'Unternehmen darf maximal 150 Zeichen lang sein.'
-  if (!data.resource_id) errors.resource_id = 'Resource-ID fehlt.'
+  if (!data.resource_id || !/^[a-z0-9]+(?:-[a-z0-9]+)*$/.test(data.resource_id)) errors.resource_id = 'Resource-ID fehlt oder ist ungültig.'
   return { valid: Object.keys(errors).length === 0, errors }
 }

privat/CV/andreknie.de/src/utils/validation.test.js

@@ -125,4 +125,10 @@ describe('validateResourceDownload', () => {
     expect(result.valid).toBe(false)
     expect(result.errors.resource_id).toBeTruthy()
   })
+
+  it('fails for a resource id that could escape the resource naming scheme', () => {
+    const result = validateResourceDownload({ ...valid, resource_id: '../profile' })
+    expect(result.valid).toBe(false)
+    expect(result.errors.resource_id).toBeTruthy()
+  })
 })