rimosso lo sfondo bianco dal logo

components/HeroBanner.tsx

@@ -31,7 +31,7 @@ export default function HeroBanner({ portal }: { portal: Partial<Portal> }) {
            <img
              src={logoUrl}
              alt="Institution Logo"
-             className="h-24 mb-6 object-contain bg-white/90 p-2 rounded-xl shadow-lg" 
+             className="h-24 mb-6 object-contain"
            />
          )}
          <h1 className="text-4xl md:text-5xl lg:text-6xl font-bold mb-6 drop-shadow-md">