diff --git a/public/admin/dashboard.html b/public/admin/dashboard.html
index 867acf89..156d76f7 100644
--- a/public/admin/dashboard.html
+++ b/public/admin/dashboard.html
@@ -15,7 +15,7 @@
         <div class="flex items-center">
           <div class="flex-shrink-0 flex items-center">
             <div class="h-8 w-8 bg-blue-600 rounded-lg flex items-center justify-center">
-              <svg class="h-5 w-5 text-white" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+              <svg aria-hidden="true" class="h-5 w-5 text-white" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                 <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 15v2m-6 4h12a2 2 0 002-2v-6a2 2 0 00-2-2H6a2 2 0 00-2 2v6a2 2 0 002 2zm10-10V7a4 4 0 00-8 0v4h8z"/>
               </svg>
             </div>
@@ -50,7 +50,7 @@
         <div class="bg-white rounded-lg shadow p-6">
           <div class="flex items-center">
             <div class="flex-shrink-0 bg-blue-100 rounded-md p-3">
-              <svg class="h-6 w-6 text-blue-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+              <svg aria-hidden="true" class="h-6 w-6 text-blue-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                 <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z"/>
               </svg>
             </div>
@@ -64,7 +64,7 @@
         <div class="bg-white rounded-lg shadow p-6">
           <div class="flex items-center">
             <div class="flex-shrink-0 bg-yellow-100 rounded-md p-3">
-              <svg class="h-6 w-6 text-yellow-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+              <svg aria-hidden="true" class="h-6 w-6 text-yellow-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                 <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 8v4l3 3m6-3a9 9 0 11-18 0 9 9 0 0118 0z"/>
               </svg>
             </div>
@@ -78,7 +78,7 @@
         <div class="bg-white rounded-lg shadow p-6">
           <div class="flex items-center">
             <div class="flex-shrink-0 bg-green-100 rounded-md p-3">
-              <svg class="h-6 w-6 text-green-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+              <svg aria-hidden="true" class="h-6 w-6 text-green-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                 <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z"/>
               </svg>
             </div>
@@ -92,7 +92,7 @@
         <div class="bg-white rounded-lg shadow p-6">
           <div class="flex items-center">
             <div class="flex-shrink-0 bg-purple-100 rounded-md p-3">
-              <svg class="h-6 w-6 text-purple-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+              <svg aria-hidden="true" class="h-6 w-6 text-purple-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                 <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 4.354a4 4 0 110 5.292M15 21H3v-1a6 6 0 0112 0v1zm0 0h6v-1a6 6 0 00-9-5.197M13 7a4 4 0 11-8 0 4 4 0 018 0z"/>
               </svg>
             </div>
diff --git a/public/admin/login.html b/public/admin/login.html
index a2cd2081..1e361a09 100644
--- a/public/admin/login.html
+++ b/public/admin/login.html
@@ -14,7 +14,7 @@
       <!-- Header -->
       <div>
         <div class="mx-auto h-12 w-12 bg-blue-600 rounded-lg flex items-center justify-center">
-          <svg class="h-8 w-8 text-white" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+          <svg aria-hidden="true" class="h-8 w-8 text-white" fill="none" stroke="currentColor" viewBox="0 0 24 24">
             <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 15v2m-6 4h12a2 2 0 002-2v-6a2 2 0 00-2-2H6a2 2 0 00-2 2v6a2 2 0 002 2zm10-10V7a4 4 0 00-8 0v4h8z"/>
           </svg>
         </div>
@@ -47,7 +47,7 @@
         <div id="error-message" class="hidden rounded-md bg-red-50 p-4">
           <div class="flex">
             <div class="flex-shrink-0">
-              <svg class="h-5 w-5 text-red-400" fill="currentColor" viewBox="0 0 20 20">
+              <svg aria-hidden="true" class="h-5 w-5 text-red-400" fill="currentColor" viewBox="0 0 20 20">
                 <path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zM8.707 7.293a1 1 0 00-1.414 1.414L8.586 10l-1.293 1.293a1 1 0 101.414 1.414L10 11.414l1.293 1.293a1 1 0 001.414-1.414L11.414 10l1.293-1.293a1 1 0 00-1.414-1.414L10 8.586 8.707 7.293z" clip-rule="evenodd"/>
               </svg>
             </div>
@@ -62,7 +62,7 @@
           <button type="submit" id="login-btn"
                   class="group relative w-full flex justify-center py-2 px-4 border border-transparent text-sm font-medium rounded-md text-white bg-blue-600 hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500">
             <span class="absolute left-0 inset-y-0 flex items-center pl-3">
-              <svg class="h-5 w-5 text-blue-500 group-hover:text-blue-400" fill="currentColor" viewBox="0 0 20 20">
+              <svg aria-hidden="true" class="h-5 w-5 text-blue-500 group-hover:text-blue-400" fill="currentColor" viewBox="0 0 20 20">
                 <path fill-rule="evenodd" d="M5 9V7a5 5 0 0110 0v2a2 2 0 012 2v5a2 2 0 01-2 2H5a2 2 0 01-2-2v-5a2 2 0 012-2zm8-2v2H7V7a3 3 0 016 0z" clip-rule="evenodd"/>
               </svg>
             </span>
diff --git a/public/advocate.html b/public/advocate.html
index 0919dd11..76e9b743 100644
--- a/public/advocate.html
+++ b/public/advocate.html
@@ -7,6 +7,7 @@
   <meta name="description" content="Join the movement for AI safety through structural guarantees. Preserve human agency, promote digital sovereignty, and advocate for responsible AI development.">
   <link rel="stylesheet" href="/css/tailwind.css">
 </head>
+<a href="#main-content" class="skip-link">Skip to main content</a>
 <body class="bg-gray-50">
 
   <!-- Navigation -->
@@ -58,7 +59,7 @@
       <div class="bg-white rounded-lg shadow-lg p-8">
         <div class="flex items-start mb-4">
           <div class="w-12 h-12 bg-green-100 rounded-lg flex items-center justify-center mr-4 flex-shrink-0">
-            <svg class="w-6 h-6 text-green-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <svg aria-hidden="true" class="w-6 h-6 text-green-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
               <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 4.354a4 4 0 110 5.292M15 21H3v-1a6 6 0 0112 0v1zm0 0h6v-1a6 6 0 00-9-5.197M13 7a4 4 0 11-8 0 4 4 0 018 0z"/>
             </svg>
           </div>
@@ -78,7 +79,7 @@
       <div class="bg-white rounded-lg shadow-lg p-8">
         <div class="flex items-start mb-4">
           <div class="w-12 h-12 bg-blue-100 rounded-lg flex items-center justify-center mr-4 flex-shrink-0">
-            <svg class="w-6 h-6 text-blue-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <svg aria-hidden="true" class="w-6 h-6 text-blue-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
               <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M3.055 11H5a2 2 0 012 2v1a2 2 0 002 2 2 2 0 012 2v2.945M8 3.935V5.5A2.5 2.5 0 0010.5 8h.5a2 2 0 012 2 2 2 0 104 0 2 2 0 012-2h1.064M15 20.488V18a2 2 0 012-2h3.064M21 12a9 9 0 11-18 0 9 9 0 0118 0z"/>
             </svg>
           </div>
@@ -98,7 +99,7 @@
       <div class="bg-white rounded-lg shadow-lg p-8">
         <div class="flex items-start mb-4">
           <div class="w-12 h-12 bg-purple-100 rounded-lg flex items-center justify-center mr-4 flex-shrink-0">
-            <svg class="w-6 h-6 text-purple-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <svg aria-hidden="true" class="w-6 h-6 text-purple-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
               <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z"/>
               <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M2.458 12C3.732 7.943 7.523 5 12 5c4.478 0 8.268 2.943 9.542 7-1.274 4.057-5.064 7-9.542 7-4.477 0-8.268-2.943-9.542-7z"/>
             </svg>
@@ -119,7 +120,7 @@
       <div class="bg-white rounded-lg shadow-lg p-8">
         <div class="flex items-start mb-4">
           <div class="w-12 h-12 bg-orange-100 rounded-lg flex items-center justify-center mr-4 flex-shrink-0">
-            <svg class="w-6 h-6 text-orange-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <svg aria-hidden="true" class="w-6 h-6 text-orange-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
               <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M17 20h5v-2a3 3 0 00-5.356-1.857M17 20H7m10 0v-2c0-.656-.126-1.283-.356-1.857M7 20H2v-2a3 3 0 015.356-1.857M7 20v-2c0-.656.126-1.283.356-1.857m0 0a5.002 5.002 0 019.288 0M15 7a3 3 0 11-6 0 3 3 0 016 0zm6 3a2 2 0 11-4 0 2 2 0 014 0zM7 10a2 2 0 11-4 0 2 2 0 014 0z"/>
             </svg>
           </div>
diff --git a/public/api-reference.html b/public/api-reference.html
index fe2f8d3d..37d826aa 100644
--- a/public/api-reference.html
+++ b/public/api-reference.html
@@ -27,10 +27,10 @@
           <span class="ml-4 text-gray-400">|</span>
           <span class="ml-4 text-gray-600">API Reference</span>
         </div>
-        <div class="flex items-center space-x-6">
-          <a href="/docs-viewer.html" class="text-gray-600 hover:text-gray-900">Documentation</a>
-          <a href="/implementer.html" class="text-gray-600 hover:text-gray-900">Implementation Guide</a>
-          <a href="/" class="text-gray-600 hover:text-gray-900">Home</a>
+        <div class="flex items-center space-x-4 sm:space-x-6">
+          <a href="/docs-viewer.html" class="text-gray-600 hover:text-gray-900 text-sm sm:text-base">Documentation</a>
+          <a href="/implementer.html" class="text-gray-600 hover:text-gray-900 text-sm sm:text-base">Implementation Guide</a>
+          <a href="/" class="text-gray-600 hover:text-gray-900 text-sm sm:text-base">Home</a>
         </div>
       </div>
     </div>
@@ -321,7 +321,7 @@
         <section id="errors" class="mb-12">
           <h2 class="text-3xl font-bold text-gray-900 mb-6">Error Codes</h2>
 
-          <div class="bg-white rounded-lg shadow-md overflow-hidden">
+          <div class="bg-white rounded-lg shadow-md overflow-x-auto">
             <table class="w-full">
               <thead class="bg-gray-50 border-b">
                 <tr>
diff --git a/public/implementer.html b/public/implementer.html
index 46164d21..996add20 100644
--- a/public/implementer.html
+++ b/public/implementer.html
@@ -7,6 +7,7 @@
   <meta name="description" content="Integrate Tractatus framework into your AI systems: practical guides, code examples, and step-by-step implementation for production safety.">
   <link rel="stylesheet" href="/css/tailwind.css">
 </head>
+<a href="#main-content" class="skip-link">Skip to main content</a>
 <body class="bg-gray-50">
 
   <!-- Navigation -->
@@ -62,25 +63,25 @@
         </p>
         <ul class="space-y-2 text-sm text-gray-600 mb-6">
           <li class="flex items-start">
-            <svg class="w-5 h-5 text-green-500 mr-2 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <svg aria-hidden="true" class="w-5 h-5 text-green-500 mr-2 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
               <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 13l4 4L19 7"/>
             </svg>
             <span>Instruction classification & storage</span>
           </li>
           <li class="flex items-start">
-            <svg class="w-5 h-5 text-green-500 mr-2 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <svg aria-hidden="true" class="w-5 h-5 text-green-500 mr-2 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
               <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 13l4 4L19 7"/>
             </svg>
             <span>Cross-reference validation</span>
           </li>
           <li class="flex items-start">
-            <svg class="w-5 h-5 text-green-500 mr-2 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <svg aria-hidden="true" class="w-5 h-5 text-green-500 mr-2 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
               <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 13l4 4L19 7"/>
             </svg>
             <span>Boundary enforcement</span>
           </li>
           <li class="flex items-start">
-            <svg class="w-5 h-5 text-green-500 mr-2 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <svg aria-hidden="true" class="w-5 h-5 text-green-500 mr-2 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
               <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 13l4 4L19 7"/>
             </svg>
             <span>Context pressure monitoring</span>
@@ -97,25 +98,25 @@
         </p>
         <ul class="space-y-2 text-sm text-gray-600 mb-6">
           <li class="flex items-start">
-            <svg class="w-5 h-5 text-green-500 mr-2 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <svg aria-hidden="true" class="w-5 h-5 text-green-500 mr-2 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
               <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 13l4 4L19 7"/>
             </svg>
             <span>Drop-in Express/Koa middleware</span>
           </li>
           <li class="flex items-start">
-            <svg class="w-5 h-5 text-green-500 mr-2 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <svg aria-hidden="true" class="w-5 h-5 text-green-500 mr-2 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
               <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 13l4 4L19 7"/>
             </svg>
             <span>Monitor mode (log only)</span>
           </li>
           <li class="flex items-start">
-            <svg class="w-5 h-5 text-green-500 mr-2 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <svg aria-hidden="true" class="w-5 h-5 text-green-500 mr-2 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
               <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 13l4 4L19 7"/>
             </svg>
             <span>Gradual enforcement rollout</span>
           </li>
           <li class="flex items-start">
-            <svg class="w-5 h-5 text-green-500 mr-2 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <svg aria-hidden="true" class="w-5 h-5 text-green-500 mr-2 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
               <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 13l4 4L19 7"/>
             </svg>
             <span>Compatible with existing auth</span>
@@ -132,25 +133,25 @@
         </p>
         <ul class="space-y-2 text-sm text-gray-600 mb-6">
           <li class="flex items-start">
-            <svg class="w-5 h-5 text-green-500 mr-2 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <svg aria-hidden="true" class="w-5 h-5 text-green-500 mr-2 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
               <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 13l4 4L19 7"/>
             </svg>
             <span>Standalone pressure monitoring</span>
           </li>
           <li class="flex items-start">
-            <svg class="w-5 h-5 text-green-500 mr-2 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <svg aria-hidden="true" class="w-5 h-5 text-green-500 mr-2 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
               <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 13l4 4L19 7"/>
             </svg>
             <span>Boundary checks only</span>
           </li>
           <li class="flex items-start">
-            <svg class="w-5 h-5 text-green-500 mr-2 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <svg aria-hidden="true" class="w-5 h-5 text-green-500 mr-2 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
               <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 13l4 4L19 7"/>
             </svg>
             <span>Classification without storage</span>
           </li>
           <li class="flex items-start">
-            <svg class="w-5 h-5 text-green-500 mr-2 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <svg aria-hidden="true" class="w-5 h-5 text-green-500 mr-2 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
               <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 13l4 4L19 7"/>
             </svg>
             <span>Custom component combinations</span>
diff --git a/public/index.html b/public/index.html
index 126d6749..061a4717 100644
--- a/public/index.html
+++ b/public/index.html
@@ -10,11 +10,17 @@
     .gradient-text { background: linear-gradient(120deg, #3b82f6 0%, #8b5cf6 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
     .hover-lift { transition: transform 0.2s; }
     .hover-lift:hover { transform: translateY(-4px); }
+    .skip-link { position: absolute; left: -9999px; }
+    .skip-link:focus { left: 0; z-index: 100; background: white; padding: 1rem; }
   </style>
 </head>
 <body class="bg-gray-50">
 
+  <!-- Skip Link for Keyboard Navigation -->
+  <a href="#main-content" class="skip-link">Skip to main content</a>
+
   <!-- Hero Section -->
+  <header role="banner">
   <section class="bg-gradient-to-br from-blue-600 via-blue-700 to-purple-700 text-white">
     <div class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-20">
       <div class="text-center">
@@ -36,11 +42,15 @@
       </div>
     </div>
   </section>
+  </header>
+
+  <!-- Main Content -->
+  <main id="main-content" role="main">
 
   <!-- Value Proposition -->
-  <section class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-16">
+  <section class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-16" aria-labelledby="core-insight">
     <div class="bg-amber-50 border-l-4 border-amber-500 p-6 rounded-r-lg">
-      <h2 class="text-2xl font-bold text-amber-900 mb-3">The Core Insight</h2>
+      <h2 id="core-insight" class="text-2xl font-bold text-amber-900 mb-3">The Core Insight</h2>
       <p class="text-amber-800 text-lg">
         Instead of hoping AI systems <em>"behave correctly,"</em> we implement <strong>architectural guarantees</strong>
         that certain decision types <strong>structurally require human judgment</strong>. This creates bounded AI operation
@@ -58,7 +68,7 @@
       <!-- Researcher Path -->
       <div class="bg-white rounded-xl shadow-lg border border-gray-200 overflow-hidden hover-lift">
         <div class="bg-gradient-to-r from-blue-500 to-blue-600 p-6">
-          <svg class="w-12 h-12 text-white mb-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+          <svg aria-hidden="true" class="w-12 h-12 text-white mb-4" fill="none" stroke="currentColor" viewBox="0 0 24 24" aria-hidden="true">
             <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12l2 2 4-4m5.618-4.016A11.955 11.955 0 0112 2.944a11.955 11.955 0 01-8.618 3.04A12.02 12.02 0 003 9c0 5.591 3.824 10.29 9 11.622 5.176-1.332 9-6.03 9-11.622 0-1.042-.133-2.052-.382-3.016z"/>
           </svg>
           <h3 class="text-2xl font-bold text-white">Researcher</h3>
@@ -70,19 +80,19 @@
           </p>
           <ul class="space-y-3 mb-6 text-sm">
             <li class="flex items-start">
-              <svg class="w-5 h-5 text-blue-600 mr-2 mt-0.5" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z"/></svg>
+              <svg aria-hidden="true" class="w-5 h-5 text-blue-600 mr-2 mt-0.5" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z"/></svg>
               <span class="text-gray-700">Technical specifications & proofs</span>
             </li>
             <li class="flex items-start">
-              <svg class="w-5 h-5 text-blue-600 mr-2 mt-0.5" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z"/></svg>
+              <svg aria-hidden="true" class="w-5 h-5 text-blue-600 mr-2 mt-0.5" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z"/></svg>
               <span class="text-gray-700">Academic research review</span>
             </li>
             <li class="flex items-start">
-              <svg class="w-5 h-5 text-blue-600 mr-2 mt-0.5" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z"/></svg>
+              <svg aria-hidden="true" class="w-5 h-5 text-blue-600 mr-2 mt-0.5" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z"/></svg>
               <span class="text-gray-700">Failure mode analysis</span>
             </li>
             <li class="flex items-start">
-              <svg class="w-5 h-5 text-blue-600 mr-2 mt-0.5" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z"/></svg>
+              <svg aria-hidden="true" class="w-5 h-5 text-blue-600 mr-2 mt-0.5" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z"/></svg>
               <span class="text-gray-700">Mathematical foundations</span>
             </li>
           </ul>
@@ -95,7 +105,7 @@
       <!-- Implementer Path -->
       <div class="bg-white rounded-xl shadow-lg border border-gray-200 overflow-hidden hover-lift">
         <div class="bg-gradient-to-r from-purple-500 to-purple-600 p-6">
-          <svg class="w-12 h-12 text-white mb-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+          <svg aria-hidden="true" class="w-12 h-12 text-white mb-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
             <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M10 20l4-16m4 4l4 4-4 4M6 16l-4-4 4-4"/>
           </svg>
           <h3 class="text-2xl font-bold text-white">Implementer</h3>
@@ -107,19 +117,19 @@
           </p>
           <ul class="space-y-3 mb-6 text-sm">
             <li class="flex items-start">
-              <svg class="w-5 h-5 text-purple-600 mr-2 mt-0.5" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z"/></svg>
+              <svg aria-hidden="true" class="w-5 h-5 text-purple-600 mr-2 mt-0.5" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z"/></svg>
               <span class="text-gray-700">Working code examples</span>
             </li>
             <li class="flex items-start">
-              <svg class="w-5 h-5 text-purple-600 mr-2 mt-0.5" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z"/></svg>
+              <svg aria-hidden="true" class="w-5 h-5 text-purple-600 mr-2 mt-0.5" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z"/></svg>
               <span class="text-gray-700">API integration patterns</span>
             </li>
             <li class="flex items-start">
-              <svg class="w-5 h-5 text-purple-600 mr-2 mt-0.5" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z"/></svg>
+              <svg aria-hidden="true" class="w-5 h-5 text-purple-600 mr-2 mt-0.5" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z"/></svg>
               <span class="text-gray-700">Service architecture diagrams</span>
             </li>
             <li class="flex items-start">
-              <svg class="w-5 h-5 text-purple-600 mr-2 mt-0.5" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z"/></svg>
+              <svg aria-hidden="true" class="w-5 h-5 text-purple-600 mr-2 mt-0.5" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z"/></svg>
               <span class="text-gray-700">Deployment best practices</span>
             </li>
           </ul>
@@ -132,7 +142,7 @@
       <!-- Advocate Path -->
       <div class="bg-white rounded-xl shadow-lg border border-gray-200 overflow-hidden hover-lift">
         <div class="bg-gradient-to-r from-green-500 to-green-600 p-6">
-          <svg class="w-12 h-12 text-white mb-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+          <svg aria-hidden="true" class="w-12 h-12 text-white mb-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
             <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M11 5.882V19.24a1.76 1.76 0 01-3.417.592l-2.147-6.15M18 13a3 3 0 100-6M5.436 13.683A4.001 4.001 0 017 6h1.832c4.1 0 7.625-1.234 9.168-3v14c-1.543-1.766-5.067-3-9.168-3H7a3.988 3.988 0 01-1.564-.317z"/>
           </svg>
           <h3 class="text-2xl font-bold text-white">Advocate</h3>
@@ -144,19 +154,19 @@
           </p>
           <ul class="space-y-3 mb-6 text-sm">
             <li class="flex items-start">
-              <svg class="w-5 h-5 text-green-600 mr-2 mt-0.5" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z"/></svg>
+              <svg aria-hidden="true" class="w-5 h-5 text-green-600 mr-2 mt-0.5" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z"/></svg>
               <span class="text-gray-700">Real-world case studies</span>
             </li>
             <li class="flex items-start">
-              <svg class="w-5 h-5 text-green-600 mr-2 mt-0.5" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z"/></svg>
+              <svg aria-hidden="true" class="w-5 h-5 text-green-600 mr-2 mt-0.5" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z"/></svg>
               <span class="text-gray-700">Plain-language explanations</span>
             </li>
             <li class="flex items-start">
-              <svg class="w-5 h-5 text-green-600 mr-2 mt-0.5" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z"/></svg>
+              <svg aria-hidden="true" class="w-5 h-5 text-green-600 mr-2 mt-0.5" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z"/></svg>
               <span class="text-gray-700">Policy implications</span>
             </li>
             <li class="flex items-start">
-              <svg class="w-5 h-5 text-green-600 mr-2 mt-0.5" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z"/></svg>
+              <svg aria-hidden="true" class="w-5 h-5 text-green-600 mr-2 mt-0.5" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z"/></svg>
               <span class="text-gray-700">Societal impact analysis</span>
             </li>
           </ul>
@@ -178,7 +188,7 @@
 
         <div class="border border-gray-200 rounded-lg p-6">
           <div class="w-12 h-12 bg-blue-100 rounded-lg flex items-center justify-center mb-4">
-            <svg class="w-6 h-6 text-blue-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <svg aria-hidden="true" class="w-6 h-6 text-blue-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
               <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2"/>
             </svg>
           </div>
@@ -190,7 +200,7 @@
 
         <div class="border border-gray-200 rounded-lg p-6">
           <div class="w-12 h-12 bg-purple-100 rounded-lg flex items-center justify-center mb-4">
-            <svg class="w-6 h-6 text-purple-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <svg aria-hidden="true" class="w-6 h-6 text-purple-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
               <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z"/>
             </svg>
           </div>
@@ -202,7 +212,7 @@
 
         <div class="border border-gray-200 rounded-lg p-6">
           <div class="w-12 h-12 bg-green-100 rounded-lg flex items-center justify-center mb-4">
-            <svg class="w-6 h-6 text-green-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <svg aria-hidden="true" class="w-6 h-6 text-green-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
               <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 15v2m-6 4h12a2 2 0 002-2v-6a2 2 0 00-2-2H6a2 2 0 00-2 2v6a2 2 0 002 2zm10-10V7a4 4 0 00-8 0v4h8z"/>
             </svg>
           </div>
@@ -214,7 +224,7 @@
 
         <div class="border border-gray-200 rounded-lg p-6">
           <div class="w-12 h-12 bg-yellow-100 rounded-lg flex items-center justify-center mb-4">
-            <svg class="w-6 h-6 text-yellow-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <svg aria-hidden="true" class="w-6 h-6 text-yellow-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
               <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M13 10V3L4 14h7v7l9-11h-7z"/>
             </svg>
           </div>
@@ -226,7 +236,7 @@
 
         <div class="border border-gray-200 rounded-lg p-6">
           <div class="w-12 h-12 bg-red-100 rounded-lg flex items-center justify-center mb-4">
-            <svg class="w-6 h-6 text-red-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <svg aria-hidden="true" class="w-6 h-6 text-red-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
               <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9.663 17h4.673M12 3v1m6.364 1.636l-.707.707M21 12h-1M4 12H3m3.343-5.657l-.707-.707m2.828 9.9a5 5 0 117.072 0l-.548.547A3.374 3.374 0 0014 18.469V19a2 2 0 11-4 0v-.531c0-.895-.356-1.754-.988-2.386l-.548-.547z"/>
             </svg>
           </div>
@@ -238,7 +248,7 @@
 
         <div class="border border-gray-200 rounded-lg p-6">
           <div class="w-12 h-12 bg-indigo-100 rounded-lg flex items-center justify-center mb-4">
-            <svg class="w-6 h-6 text-indigo-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <svg aria-hidden="true" class="w-6 h-6 text-indigo-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
               <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 4.354a4 4 0 110 5.292M15 21H3v-1a6 6 0 0112 0v1zm0 0h6v-1a6 6 0 00-9-5.197M13 7a4 4 0 11-8 0 4 4 0 018 0z"/>
             </svg>
           </div>
@@ -270,8 +280,10 @@
     </div>
   </section>
 
+  </main>
+
   <!-- Footer -->
-  <footer class="bg-gray-900 text-gray-400 py-12">
+  <footer class="bg-gray-900 text-gray-400 py-12" role="contentinfo">
     <div class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
       <div class="grid grid-cols-1 md:grid-cols-3 gap-8">
         <div>
diff --git a/public/researcher.html b/public/researcher.html
index b94bfa2e..1694f327 100644
--- a/public/researcher.html
+++ b/public/researcher.html
@@ -7,6 +7,7 @@
   <meta name="description" content="Tractatus framework research: architectural constraints, theoretical foundations, and empirical validation of AI safety through structural guarantees.">
   <link rel="stylesheet" href="/css/tailwind.css">
 </head>
+<a href="#main-content" class="skip-link">Skip to main content</a>
 <body class="bg-gray-50">
 
   <!-- Navigation -->
@@ -57,7 +58,7 @@
       <!-- Theoretical Foundations -->
       <div class="bg-white rounded-lg shadow-lg p-8">
         <div class="w-12 h-12 bg-purple-100 rounded-lg flex items-center justify-center mb-4">
-          <svg class="w-6 h-6 text-purple-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+          <svg aria-hidden="true" class="w-6 h-6 text-purple-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
             <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z"/>
           </svg>
         </div>
@@ -84,7 +85,7 @@
       <!-- Architectural Analysis -->
       <div class="bg-white rounded-lg shadow-lg p-8">
         <div class="w-12 h-12 bg-blue-100 rounded-lg flex items-center justify-center mb-4">
-          <svg class="w-6 h-6 text-blue-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+          <svg aria-hidden="true" class="w-6 h-6 text-blue-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
             <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 11H5m14 0a2 2 0 012 2v6a2 2 0 01-2 2H5a2 2 0 01-2-2v-6a2 2 0 012-2m14 0V9a2 2 0 00-2-2M5 11V9a2 2 0 012-2m0 0V5a2 2 0 012-2h6a2 2 0 012 2v2M7 7h10"/>
           </svg>
         </div>
@@ -119,7 +120,7 @@
       <!-- Empirical Validation -->
       <div class="bg-white rounded-lg shadow-lg p-8">
         <div class="w-12 h-12 bg-green-100 rounded-lg flex items-center justify-center mb-4">
-          <svg class="w-6 h-6 text-green-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+          <svg aria-hidden="true" class="w-6 h-6 text-green-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
             <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 19v-6a2 2 0 00-2-2H5a2 2 0 00-2 2v6a2 2 0 002 2h2a2 2 0 002-2zm0 0V9a2 2 0 012-2h2a2 2 0 012 2v10m-6 0a2 2 0 002 2h2a2 2 0 002-2m0 0V5a2 2 0 012-2h2a2 2 0 012 2v14a2 2 0 01-2 2h-2a2 2 0 01-2-2z"/>
           </svg>
         </div>