[fix] Background transparent

css/main.css

@@ -94,6 +94,9 @@ a.navbar-brand > img {
     border-bottom: 0;
     margin-left:0.5rem;
 }
+#navbarNav {
+    background-color:white;
+}
 .navbar-light .navbar-nav .nav-link.btn.active {
     color:white;
     padding-bottom:6px;