Add collaborative perception interface

index.html

@@ -14,7 +14,7 @@
 
         body {
             font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
-            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+            background: linear-gradient(135deg, #070707 0%, #20033d 100%);
             min-height: 100vh;
             color: #333;
         }