diff --git a/public/assets/mitapp-dashboard.webp b/public/assets/mitapp-dashboard.webp
new file mode 100644
index 0000000..227c739
Binary files /dev/null and b/public/assets/mitapp-dashboard.webp differ
diff --git a/public/assets/mitapp-qr.webp b/public/assets/mitapp-qr.webp
new file mode 100644
index 0000000..4a6931e
Binary files /dev/null and b/public/assets/mitapp-qr.webp differ
diff --git a/public/assets/mitapp-roadmap.webp b/public/assets/mitapp-roadmap.webp
new file mode 100644
index 0000000..9c6463b
Binary files /dev/null and b/public/assets/mitapp-roadmap.webp differ
diff --git a/public/assets/og-image.png b/public/assets/og-image.png
new file mode 100644
index 0000000..32ddbdf
Binary files /dev/null and b/public/assets/og-image.png differ
diff --git a/public/datenschutz.html b/public/datenschutz.html
index b0ba989..760783d 100644
--- a/public/datenschutz.html
+++ b/public/datenschutz.html
@@ -6,8 +6,9 @@
 <title>Datenschutzerklärung: ToolCTRL</title>
 <meta name="description" content="Datenschutzerklärung von ToolCTRL: Informationen zur Verarbeitung personenbezogener Daten auf dieser Website." />
 <meta name="robots" content="noindex" />
+<link rel="canonical" href="https://tool-ctrl.de/datenschutz.html" />
 <link rel="icon" type="image/png" href="/assets/favicon.png" />
-<link rel="stylesheet" href="/styles.css" />
+<link rel="stylesheet" href="/styles.css?v=20260610" />
 </head>
 <body>
 
diff --git a/public/gamejam.html b/public/gamejam.html
index 76c4947..09a3967 100644
--- a/public/gamejam.html
+++ b/public/gamejam.html
@@ -5,6 +5,15 @@
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 <title>AI GameJam: Human in the Loop, TechDay Bruchsal 2026</title>
 <meta name="description" content="AI GameJam von ToolCTRL beim TechDay Bruchsal 2026: In wenigen Stunden mit KI ein spielbares Game bauen. Human in the Loop, im HubWerk01 Bruchsal.">
+<link rel="canonical" href="https://tool-ctrl.de/gamejam.html">
+<meta property="og:type" content="website">
+<meta property="og:site_name" content="ToolCTRL">
+<meta property="og:locale" content="de_DE">
+<meta property="og:url" content="https://tool-ctrl.de/gamejam.html">
+<meta property="og:title" content="AI GameJam: Human in the Loop, TechDay Bruchsal 2026">
+<meta property="og:description" content="AI GameJam von ToolCTRL beim TechDay Bruchsal 2026: In wenigen Stunden mit KI ein spielbares Game bauen. Human in the Loop, im HubWerk01 Bruchsal.">
+<meta property="og:image" content="https://tool-ctrl.de/assets/og-image.png">
+<meta name="twitter:card" content="summary_large_image">
 <link rel="icon" type="image/png" href="/assets/favicon.png">
 <link rel="preconnect" href="https://fonts.googleapis.com">
 <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
diff --git a/public/impressum.html b/public/impressum.html
index 067bde3..86cd47a 100644
--- a/public/impressum.html
+++ b/public/impressum.html
@@ -6,8 +6,9 @@
 <title>Impressum: ToolCTRL</title>
 <meta name="description" content="Impressum und Anbieterkennzeichnung von ToolCTRL." />
 <meta name="robots" content="noindex" />
+<link rel="canonical" href="https://tool-ctrl.de/impressum.html" />
 <link rel="icon" type="image/png" href="/assets/favicon.png" />
-<link rel="stylesheet" href="/styles.css" />
+<link rel="stylesheet" href="/styles.css?v=20260610" />
 </head>
 <body>
 
diff --git a/public/index.html b/public/index.html
index 2c1b1ca..cb29899 100644
--- a/public/index.html
+++ b/public/index.html
@@ -15,13 +15,13 @@
 <meta property="og:url" content="https://tool-ctrl.de/" />
 <meta property="og:title" content="ToolCTRL: Moderne All-in-One-Software für eure Branche" />
 <meta property="og:description" content="ToolCTRL baut moderne All-in-One-Software für Branchen, die zu lange mit veralteten Insellösungen arbeiten mussten. Fokus auf Bedienung und Gestaltung." />
-<meta property="og:image" content="https://tool-ctrl.de/assets/logo-a.png" />
+<meta property="og:image" content="https://tool-ctrl.de/assets/og-image.png" />
 
 <!-- Twitter -->
 <meta name="twitter:card" content="summary_large_image" />
 <meta name="twitter:title" content="ToolCTRL: Moderne All-in-One-Software für eure Branche" />
 <meta name="twitter:description" content="ToolCTRL baut moderne All-in-One-Software für Branchen, die zu lange mit veralteten Insellösungen arbeiten mussten. Fokus auf Bedienung und Gestaltung." />
-<meta name="twitter:image" content="https://tool-ctrl.de/assets/logo-a.png" />
+<meta name="twitter:image" content="https://tool-ctrl.de/assets/og-image.png" />
 
 <!-- Structured Data -->
 <script type="application/ld+json">
@@ -37,7 +37,7 @@
 </script>
 <link rel="icon" type="image/png" href="/assets/favicon.png" />
 <link rel="preconnect" href="https://fonts.googleapis.com" />
-<link rel="stylesheet" href="/styles.css?v=20260604" />
+<link rel="stylesheet" href="/styles.css?v=20260610" />
 </head>
 <body>
 
@@ -504,6 +504,6 @@
   </div>
 </footer>
 
-<script src="/script.js"></script>
+<script src="/script.js?v=20260610"></script>
 </body>
 </html>
diff --git a/public/sitemap.xml b/public/sitemap.xml
index c4499fe..ab8d33c 100644
--- a/public/sitemap.xml
+++ b/public/sitemap.xml
@@ -2,22 +2,17 @@
 <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
   <url>
     <loc>https://tool-ctrl.de/</loc>
+    <lastmod>2026-06-10</lastmod>
     <priority>1.0</priority>
   </url>
   <url>
     <loc>https://tool-ctrl.de/techday.html</loc>
+    <lastmod>2026-06-10</lastmod>
     <priority>0.8</priority>
   </url>
   <url>
     <loc>https://tool-ctrl.de/gamejam.html</loc>
+    <lastmod>2026-06-10</lastmod>
     <priority>0.6</priority>
   </url>
-  <url>
-    <loc>https://tool-ctrl.de/impressum.html</loc>
-    <priority>0.2</priority>
-  </url>
-  <url>
-    <loc>https://tool-ctrl.de/datenschutz.html</loc>
-    <priority>0.2</priority>
-  </url>
 </urlset>
diff --git a/public/techday.html b/public/techday.html
index a9a8b36..3352d00 100644
--- a/public/techday.html
+++ b/public/techday.html
@@ -5,8 +5,47 @@
 <meta name="viewport" content="width=device-width, initial-scale=1" />
 <title>TechDay Bruchsal 2026: ToolCTRL</title>
 <meta name="description" content="ToolCTRL beim Bruchsaler TechDay 2026: Vortrag, AI GameJam und die mITapp. Am 27. Mai 2026 im HubWerk01 Bruchsal." />
+<link rel="canonical" href="https://tool-ctrl.de/techday.html" />
+
+<!-- Open Graph -->
+<meta property="og:type" content="website" />
+<meta property="og:site_name" content="ToolCTRL" />
+<meta property="og:locale" content="de_DE" />
+<meta property="og:url" content="https://tool-ctrl.de/techday.html" />
+<meta property="og:title" content="TechDay Bruchsal 2026: ToolCTRL" />
+<meta property="og:description" content="ToolCTRL beim Bruchsaler TechDay 2026: Vortrag, AI GameJam und die mITapp. Am 27. Mai 2026 im HubWerk01 Bruchsal." />
+<meta property="og:image" content="https://tool-ctrl.de/assets/techday-event.png" />
+<meta name="twitter:card" content="summary_large_image" />
+
+<!-- Structured Data -->
+<script type="application/ld+json">
+{
+  "@context": "https://schema.org",
+  "@type": "Event",
+  "name": "TechDay Bruchsal 2026",
+  "startDate": "2026-05-27",
+  "eventStatus": "https://schema.org/EventScheduled",
+  "eventAttendanceMode": "https://schema.org/OfflineEventAttendanceMode",
+  "location": {
+    "@type": "Place",
+    "name": "HubWerk01",
+    "address": {
+      "@type": "PostalAddress",
+      "addressLocality": "Bruchsal",
+      "addressCountry": "DE"
+    }
+  },
+  "image": "https://tool-ctrl.de/assets/techday-event.png",
+  "description": "ToolCTRL beim Bruchsaler TechDay 2026: Vortrag, AI GameJam und die mITapp. Am 27. Mai 2026 im HubWerk01 Bruchsal.",
+  "organizer": {
+    "@type": "Organization",
+    "name": "ToolCTRL",
+    "url": "https://tool-ctrl.de"
+  }
+}
+</script>
 <link rel="icon" type="image/png" href="/assets/favicon.png" />
-<link rel="stylesheet" href="/styles.css" />
+<link rel="stylesheet" href="/styles.css?v=20260610" />
 </head>
 <body>
 
@@ -120,7 +159,7 @@
       <aside class="speaker-card">
         <div class="sp-label">Speaker</div>
         <div class="sp-head">
-          <img class="sp-photo" src="/assets/speaker-david.jpg" alt="David Bertram" />
+          <img class="sp-photo" src="/assets/speaker-david.jpg" alt="David Bertram" width="320" height="320" loading="lazy" decoding="async" />
           <div>
             <div class="sp-name">David Bertram</div>
             <div class="sp-role">Co-Founder &amp; Head of Product, ToolCTRL</div>
@@ -153,15 +192,15 @@
 
     <div class="mitapp-shots">
       <figure class="shot">
-        <img src="/assets/mitapp-dashboard.png" alt="mITapp Dashboard-Ansicht" />
+        <img src="/assets/mitapp-dashboard.webp" alt="mITapp Dashboard-Ansicht" width="1100" height="825" loading="lazy" decoding="async" />
         <figcaption>Dashboard</figcaption>
       </figure>
       <figure class="shot">
-        <img src="/assets/mitapp-roadmap.png" alt="mITapp Event-Roadmap" />
+        <img src="/assets/mitapp-roadmap.webp" alt="mITapp Event-Roadmap" width="1100" height="825" loading="lazy" decoding="async" />
         <figcaption>Event-Roadmap</figcaption>
       </figure>
       <figure class="shot">
-        <img src="/assets/mitapp-qr.png" alt="mITapp Networking per QR-Code" />
+        <img src="/assets/mitapp-qr.webp" alt="mITapp Networking per QR-Code" width="1100" height="825" loading="lazy" decoding="async" />
         <figcaption>Networking per QR-Code</figcaption>
       </figure>
     </div>
@@ -267,6 +306,6 @@
   </div>
 </footer>
 
-<script src="/script.js"></script>
+<script src="/script.js?v=20260610"></script>
 </body>
 </html>
diff --git a/server.js b/server.js
index 0a0cd47..b8b624c 100644
--- a/server.js
+++ b/server.js
@@ -112,6 +112,7 @@ const MIME = {
   ".png": "image/png",
   ".jpg": "image/jpeg",
   ".jpeg": "image/jpeg",
+  ".webp": "image/webp",
   ".ico": "image/x-icon",
   ".json": "application/json; charset=utf-8",
   ".woff2": "font/woff2",
@@ -174,6 +175,20 @@ function saveLead(lead) {
 /* ---------- Statische Dateien ---------- */
 function serveStatic(req, res) {
   let urlPath = decodeURIComponent(req.url.split("?")[0]);
+
+  /* SEO: kanonischer Host (www -> non-www) und /index.html -> / */
+  const host = (req.headers.host || "").toLowerCase();
+  if (host === "www.tool-ctrl.de") {
+    res.writeHead(301, { Location: "https://tool-ctrl.de" + req.url });
+    res.end();
+    return;
+  }
+  if (urlPath === "/index.html") {
+    res.writeHead(301, { Location: "/" });
+    res.end();
+    return;
+  }
+
   if (urlPath === "/") urlPath = "/index.html";
 
   /* Path-Traversal verhindern */
@@ -195,9 +210,13 @@ function serveStatic(req, res) {
       return;
     }
     const ext = path.extname(filePath).toLowerCase();
+    /* HTML immer frisch, statische Assets lange cachen (Versionierung via ?v=) */
+    const cacheControl = ext === ".html"
+      ? "no-cache"
+      : "public, max-age=31536000, immutable";
     res.writeHead(200, {
       "Content-Type": MIME[ext] || "application/octet-stream",
-      "Cache-Control": "no-cache"
+      "Cache-Control": cacheControl
     });
     fs.createReadStream(filePath).pipe(res);
   });