diff --git a/apps/web/src/app/example/layout.tsx b/apps/web/src/app/example/layout.tsx
new file mode 100644
index 0000000..89088e1
--- /dev/null
+++ b/apps/web/src/app/example/layout.tsx
@@ -0,0 +1,11 @@
+import type { Metadata } from 'next';
+
+export const metadata: Metadata = {
+  title: 'Live example · LearnKit AI',
+  description:
+    'See <LearningPath /> render a real AI learning path in your browser — no backend, no LLM, fully deterministic.',
+};
+
+export default function ExampleLayout({ children }: { children: React.ReactNode }) {
+  return children;
+}
diff --git a/apps/web/src/app/not-found.tsx b/apps/web/src/app/not-found.tsx
new file mode 100644
index 0000000..5693dea
--- /dev/null
+++ b/apps/web/src/app/not-found.tsx
@@ -0,0 +1,112 @@
+import type { Metadata } from 'next';
+import Link from 'next/link';
+import { Nav } from '@/components/layout/Nav';
+import { Footer } from '@/components/layout/Footer';
+
+export const metadata: Metadata = {
+  title: '404 — Page not found · LearnKit AI',
+};
+
+export default function NotFound() {
+  return (
+    <main
+      className="paper-grain"
+      style={{ background: 'var(--paper)', minHeight: '100vh', display: 'flex', flexDirection: 'column' }}
+    >
+      <Nav />
+      <div
+        style={{
+          flex: 1,
+          display: 'flex',
+          flexDirection: 'column',
+          alignItems: 'center',
+          justifyContent: 'center',
+          padding: '80px 56px',
+          textAlign: 'center',
+        }}
+      >
+        <div
+          style={{
+            fontFamily: 'var(--mono)',
+            fontSize: 11,
+            color: 'var(--accent)',
+            textTransform: 'uppercase',
+            letterSpacing: '0.12em',
+            marginBottom: 20,
+          }}
+        >
+          404
+        </div>
+        <h1
+          className="serif"
+          style={{
+            fontSize: 56,
+            lineHeight: 1.05,
+            letterSpacing: '-0.03em',
+            fontWeight: 400,
+            margin: '0 0 18px',
+          }}
+        >
+          Page not found.
+        </h1>
+        <p
+          style={{
+            fontSize: 17,
+            color: 'var(--ink-soft)',
+            lineHeight: 1.55,
+            maxWidth: 440,
+            margin: '0 0 36px',
+          }}
+        >
+          The path you followed doesn&apos;t exist — but a learning path does. Try one of these instead.
+        </p>
+        <div style={{ display: 'flex', gap: 12, flexWrap: 'wrap', justifyContent: 'center' }}>
+          <Link
+            href="/demo"
+            style={{
+              background: 'var(--ink)',
+              color: 'var(--paper)',
+              padding: '11px 22px',
+              borderRadius: 8,
+              fontSize: 14,
+              fontWeight: 500,
+              textDecoration: 'none',
+            }}
+          >
+            Build your path
+          </Link>
+          <Link
+            href="/docs"
+            style={{
+              background: 'transparent',
+              color: 'var(--ink)',
+              padding: '11px 22px',
+              borderRadius: 8,
+              fontSize: 14,
+              fontWeight: 500,
+              border: '1px solid var(--rule-strong)',
+              textDecoration: 'none',
+            }}
+          >
+            Read the docs
+          </Link>
+          <Link
+            href="/"
+            style={{
+              background: 'transparent',
+              color: 'var(--ink-soft)',
+              padding: '11px 22px',
+              borderRadius: 8,
+              fontSize: 14,
+              fontWeight: 450,
+              textDecoration: 'none',
+            }}
+          >
+            Home
+          </Link>
+        </div>
+      </div>
+      <Footer />
+    </main>
+  );
+}
diff --git a/apps/web/src/app/opengraph-image.tsx b/apps/web/src/app/opengraph-image.tsx
index 25b801b..c0d5570 100644
--- a/apps/web/src/app/opengraph-image.tsx
+++ b/apps/web/src/app/opengraph-image.tsx
@@ -1,7 +1,7 @@
 import { ImageResponse } from 'next/og';
 
 export const runtime = 'edge';
-export const alt = 'LearnKit AI — The AI workbench for teams that ship';
+export const alt = 'LearnKit AI — Open-source AI learning paths for every role';
 export const size = { width: 1200, height: 630 };
 export const contentType = 'image/png';
 
@@ -35,16 +35,15 @@ export default function OGImage() {
         <div style={{ display: 'flex', flexDirection: 'column', gap: 24 }}>
           <div
             style={{
-              fontSize: 84,
+              fontSize: 80,
               lineHeight: 1.0,
               letterSpacing: '-0.035em',
               fontWeight: 400,
             }}
           >
-            Make your team
+            Personalized AI paths
             <br />
-            good at AI by{' '}
-            <span style={{ fontStyle: 'italic', color: '#C8472A' }}>Friday</span>.
+            for <span style={{ fontStyle: 'italic', color: '#C8472A' }}>every role</span>.
           </div>
           <div
             style={{
@@ -54,8 +53,8 @@ export default function OGImage() {
               lineHeight: 1.35,
             }}
           >
-            The AI workbench for teams that ship. Learn Claude, Cursor, ChatGPT and 40+ tools by
-            building real things at work.
+            Open-source TypeScript engine for embedding role-aware AI learning paths in any product.
+            No API key. No backend. No paid tier.
           </div>
         </div>
 
@@ -70,11 +69,11 @@ export default function OGImage() {
         >
           <div>learnkit-ai.com</div>
           <div style={{ display: 'flex', gap: 24 }}>
-            <span>Open source</span>
-            <span>·</span>
             <span>Apache-2.0</span>
             <span>·</span>
-            <span>TypeScript + Next.js</span>
+            <span>@learnkit-ai/core</span>
+            <span>·</span>
+            <span>@learnkit-ai/react</span>
           </div>
         </div>
       </div>
diff --git a/apps/web/src/components/developers/CodeBlock.tsx b/apps/web/src/components/developers/CodeBlock.tsx
index bbc7eeb..d5b5f5d 100644
--- a/apps/web/src/components/developers/CodeBlock.tsx
+++ b/apps/web/src/components/developers/CodeBlock.tsx
@@ -60,12 +60,20 @@ function highlight(line: string) {
 export function CodeBlock() {
   const [tab, setTab] = useState<Lang>('install');
   const [step, setStep] = useState(0);
+  const [copied, setCopied] = useState(false);
 
   useEffect(() => {
     const id = setInterval(() => setStep((s) => (s + 1) % 4), 2200);
     return () => clearInterval(id);
   }, []);
 
+  function handleCopy() {
+    navigator.clipboard.writeText(SNIPPETS[tab]).then(() => {
+      setCopied(true);
+      setTimeout(() => setCopied(false), 1800);
+    }).catch(() => undefined);
+  }
+
   return (
     <div
       style={{
@@ -121,18 +129,20 @@ export function CodeBlock() {
             {tab === 'install' ? 'shell' : `${tab === 'core' ? '@learnkit-ai/core' : '@learnkit-ai/react'} · v0.1.0`}
           </span>
           <button
+            onClick={handleCopy}
             style={{
-              background: 'rgba(255,255,255,0.06)',
+              background: copied ? 'rgba(107,143,110,0.25)' : 'rgba(255,255,255,0.06)',
               border: 'none',
-              color: 'rgba(244,239,227,0.7)',
+              color: copied ? 'rgba(107,200,113,0.9)' : 'rgba(244,239,227,0.7)',
               padding: '4px 10px',
               borderRadius: 6,
               fontSize: 11,
               fontFamily: 'var(--mono)',
               cursor: 'pointer',
+              transition: 'background 0.2s, color 0.2s',
             }}
           >
-            copy
+            {copied ? 'copied!' : 'copy'}
           </button>
         </div>
       </div>
diff --git a/apps/web/src/components/layout/Footer.tsx b/apps/web/src/components/layout/Footer.tsx
index b13cee7..f9b6de1 100644
--- a/apps/web/src/components/layout/Footer.tsx
+++ b/apps/web/src/components/layout/Footer.tsx
@@ -34,9 +34,9 @@ const LINKS: FooterCol[] = [
   {
     h: 'Developers',
     l: [
-      { label: 'Docs', href: '/developers' },
-      { label: 'API reference', href: '/developers#endpoints' },
-      { label: 'SDKs · GitHub', href: 'https://github.com/learnkit-ai/learnkit' },
+      { label: 'Docs', href: '/docs' },
+      { label: 'API reference', href: '/developers' },
+      { label: 'GitHub', href: 'https://github.com/learnkit-ai/learnkit' },
       { label: 'Blog', href: '/blog' },
     ],
   },
@@ -69,7 +69,7 @@ export function Footer() {
                 maxWidth: 280,
               }}
             >
-              The AI workbench for teams that ship.
+              Open-source TypeScript engine for embedding personalized AI learning paths. Apache-2.0.
             </p>
           </div>
           {LINKS.map((col) => (
@@ -113,9 +113,9 @@ export function Footer() {
             <span style={{ fontSize: 12, color: 'var(--muted)' }}>© 2026 LearnKit AI, Inc. · learnkit-ai.com</span>
           </div>
           <div style={{ display: 'flex', gap: 16, fontSize: 12, color: 'var(--muted)' }}>
-            {['Privacy', 'Terms', 'Security', 'Apache-2.0'].map((item) => (
-              <a key={item} href="#" style={{ color: 'inherit', textDecoration: 'none' }}>{item}</a>
-            ))}
+            <a href="https://github.com/learnkit-ai/learnkit/blob/main/SECURITY.md" target="_blank" rel="noopener noreferrer" style={{ color: 'inherit', textDecoration: 'none' }}>Security</a>
+            <a href="https://github.com/learnkit-ai/learnkit/blob/main/LICENSE" target="_blank" rel="noopener noreferrer" style={{ color: 'inherit', textDecoration: 'none' }}>Apache-2.0</a>
+            <a href="https://github.com/learnkit-ai/learnkit/blob/main/CONTRIBUTING.md" target="_blank" rel="noopener noreferrer" style={{ color: 'inherit', textDecoration: 'none' }}>Contributing</a>
           </div>
         </div>
       </div>