Update logo CSS: Increase max width, center-align text.

app.py

@@ -113,9 +113,10 @@ body {
 }
 
 .logo {
-    max-width: 200px;
+    max-width: 300px;
     max-height: 100px;
     transition: transform 0.3s ease;
+    text-align: center;
 }
 
 .logo:hover {