Fix mobile menu scolling issue

public/styles.css

@@ -67,6 +67,9 @@ body {
   padding: 0;
   width: 100%;
 }
+body.disable-scroll {
+  overflow: hidden;
+}
 a {
   color: var(--accent-text);
   text-decoration: none;

src/js/classes/Router.js

@@ -28,6 +28,7 @@ export default class Router {
     // Toggle menu open.
     document.querySelector('.site-header--hamburger-btn').addEventListener('click', () => {
       document.querySelector('.site-header').classList.toggle('open');
+      document.body.classList.toggle('disable-scroll');
     });
 
     // Global click listener setup