Fix container

sass/components/nav.sass

@@ -124,7 +124,10 @@ a.nav-item
     align-items: stretch
     display: flex
     min-height: $nav-height
-    width: 100%
   // Modifiers
   &.has-shadow
     box-shadow: 0 2px 3px rgba($black, 0.1)
+  // Responsiveness
+  +mobile
+    & > .container
+      width: 100%

sass/elements/other.sass

@@ -5,15 +5,16 @@
   position: relative
   +desktop
     margin: 0 auto
-    max-width: $desktop - 40px
+    width: $desktop - 40px
     // Modifiers
     &.is-fluid
       margin: 0 20px
       max-width: none
+      width: auto
   +widescreen
-    max-width: $widescreen - 40px
+    width: $widescreen - 40px
   +fullhd
-    max-width: $fullhd - 40px
+    width: $fullhd - 40px
 
 .delete
   +delete