$menu-width -> $menu-thickness

src/style/main.scss

@@ -64,7 +64,7 @@ a {
 }
 
 .body-wrapper__content {
-  $margin: $single-margin + $menu-width;
+  $margin: $single-margin + $menu-thickness;
 
   flex: 1;
   margin: $margin auto 0;

src/style/variables.scss

@@ -33,6 +33,6 @@ $title-font: "PT Sans", Arial, sans-serif;
 $text-font: "PT Sans", Arial, sans-serif;
 
 //MENU
-$menu-width: 2.5em;
+$menu-thickness: 2.5em;
 $menu-colored-mark-thickness: 4px;
 $menu-inactive-item-color: hsl(0, 0%, 40%);