diff --git a/profile/og-image.png b/profile/og-image.png
new file mode 100644
index 0000000..84d75d5
Binary files /dev/null and b/profile/og-image.png differ
diff --git a/profile/robots.txt b/profile/robots.txt
new file mode 100644
index 0000000..696b0ff
--- /dev/null
+++ b/profile/robots.txt
@@ -0,0 +1,4 @@
+User-agent: *
+Allow: /
+
+Sitemap: https://spxp.org/sitemap.xml
diff --git a/profile/sitemap.xml b/profile/sitemap.xml
new file mode 100644
index 0000000..b9840e8
--- /dev/null
+++ b/profile/sitemap.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+    <url>
+        <loc>https://spxp.org/</loc>
+        <lastmod>2026-03-30</lastmod>
+        <changefreq>monthly</changefreq>
+        <priority>1.0</priority>
+    </url>
+</urlset>
diff --git a/src/layouts/modern.html b/src/layouts/modern.html
index d71b60f..e53d2a6 100644
--- a/src/layouts/modern.html
+++ b/src/layouts/modern.html
@@ -5,7 +5,66 @@
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <title>SPXP – Social Profile Exchange Protocol</title>
     <meta name="description" content="A decentralized social network protocol focusing on privacy, security, and individual sovereignty. Own your data. Control your feed. No algorithms.">
-    
+
+    <!-- Canonical URL -->
+    <link rel="canonical" href="https://spxp.org/">
+
+    <!-- Open Graph -->
+    <meta property="og:type" content="website">
+    <meta property="og:title" content="SPXP – Social Profile Exchange Protocol">
+    <meta property="og:description" content="A decentralized social network protocol focusing on privacy, security, and individual sovereignty. Own your data. Control your feed. No algorithms.">
+    <meta property="og:url" content="https://spxp.org/">
+    <meta property="og:image" content="https://spxp.org/og-image.png">
+    <meta property="og:image:width" content="1200">
+    <meta property="og:image:height" content="630">
+    <meta property="og:site_name" content="SPXP">
+
+    <!-- Twitter Card -->
+    <meta name="twitter:card" content="summary_large_image">
+    <meta name="twitter:title" content="SPXP – Social Profile Exchange Protocol">
+    <meta name="twitter:description" content="A decentralized social network protocol focusing on privacy, security, and individual sovereignty. Own your data. Control your feed.">
+    <meta name="twitter:image" content="https://spxp.org/og-image.png">
+
+    <!-- Structured Data (JSON-LD) -->
+    <script type="application/ld+json">
+    {
+        "@context": "https://schema.org",
+        "@type": "WebSite",
+        "name": "SPXP – Social Profile Exchange Protocol",
+        "url": "https://spxp.org/",
+        "description": "A decentralized social network protocol focusing on privacy, security, and individual sovereignty.",
+        "license": "https://opensource.org/licenses/Apache-2.0",
+        "publisher": {
+            "@type": "Organization",
+            "name": "SPXP",
+            "url": "https://spxp.org/",
+            "logo": {
+                "@type": "ImageObject",
+                "url": "https://spxp.org/spxp-profile-logo.png"
+            },
+            "sameAs": [
+                "https://github.com/spxp",
+                "https://www.youtube.com/@SocialProfileExchangeProtocol"
+            ]
+        },
+        "mainEntity": {
+            "@type": "SoftwareApplication",
+            "name": "SPXP",
+            "applicationCategory": "DeveloperApplication",
+            "operatingSystem": "Web",
+            "description": "Open protocol for decentralized social profiles with end-to-end encryption, signed content, and full data sovereignty.",
+            "url": "https://spxp.org/",
+            "license": "https://opensource.org/licenses/Apache-2.0",
+            "softwareVersion": "0.4",
+            "offers": {
+                "@type": "Offer",
+                "price": 0,
+                "priceCurrency": "USD"
+            }
+        }
+    }
+    </script>
+
     <!-- Favicon -->
     <link rel="icon" type="image/svg+xml" href="data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'><text y='.9em' font-size='90'>🔐</text></svg>">