add hidden class

css/style.css

@@ -467,6 +467,16 @@ nav .nav-btn {
 		font-size: 1rem;
 	}
 
+	.ybdnb {
+        opacity: 0;
+        position: absolute;
+        top: 0;
+        left: 0;
+        height: 0;
+        width: 0;
+        z-index: -1;
+    }
+
 	.blog-card {
 		flex-wrap: wrap;
 	}