WIP

src/scss/header.scss

@@ -35,6 +35,14 @@
     }
 
     nav.main-nav {
+        @include media-breakpoint-down(md) {
+            display: none;
+
+            .mobile-nav-open & {
+                display: block;
+            }
+        }
+
         & > div {
             height: 100%;
         }