Update styles.css

styles.css

@@ -12,6 +12,13 @@ body {
     margin: 0 auto;
 }
 
+/* Nav-bar styling */
+.nav-bar {
+  position: sticky; 
+  top: 0px;
+  background: white;
+}
+
 /* Header styling */
 .navbar-title {
     color: #2c3e50 !important;