more documentation

Author: Felix Hennig

src/css/nav.css

@@ -2,6 +2,10 @@
  * The vertical navigation at the top is in the header.css
  * At less than 770px, the navbar disappears and is opened with
  * a button in the toolbar.
+ *
+ * Some of the responsiveness is about adjusting the height of the
+ * menu. On smaller screens the vertical menu disappears, so the height
+ * of the sidebar menu needs to be adjusted.
  */
 
 .nav-container {

src/css/toolbar.css

@@ -1,3 +1,8 @@
+/* The toolbar contains a home link and breakcrumbs and is found
+ * right above the article content.
+ * On smaller screens it also contains a button to show the sidebar menu.
+ */
+
 .toolbar {
   color: var(--toolbar-font-color);
   align-items: center;