fix(web): QR code 200px desktop, 160px mobile - correct media query placement

web/css/style.css

@@ -1467,7 +1467,7 @@ ul { list-style: none; }
 }
 
 .contact-qr img {
-  width: 100px;
+  width: 200px;
   height: auto;
   border-radius: var(--radius-md);
 }
@@ -1479,7 +1479,7 @@ ul { list-style: none; }
 }
 @media (max-width: 768px) {
   .contact-qr img {
-    width: 200px;
+    width: 160px;
   }
 }