diff --git a/public/favicon.svg b/public/favicon.svg
index 49ae4b7..9da9c46 100644
--- a/public/favicon.svg
+++ b/public/favicon.svg
@@ -1,10 +1,5 @@
 <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32" fill="none">
-  <rect width="32" height="32" rx="8" fill="url(#g)"/>
-  <path fill="#fff" d="M8 22V10h3.2l4.1 6.1h.1L19.4 10H22.8v12h-3.1V15.5l-3.4 4.7h-1.8L11.1 15.5V22H8Z"/>
-  <defs>
-    <linearGradient id="g" x1="6" y1="4" x2="28" y2="28" gradientUnits="userSpaceOnUse">
-      <stop stop-color="#38bdf8"/>
-      <stop offset="1" stop-color="#a78bfa"/>
-    </linearGradient>
-  </defs>
+  <!-- O quantum: anello + nucleo (dal wordmark NexStudio) -->
+  <circle cx="16" cy="16" r="11.5" stroke="#B380FF" stroke-width="5" />
+  <circle cx="16" cy="16" r="3.2" fill="#B380FF" />
 </svg>