main column size for large screens

src/stylesheets/styles.scss

@@ -153,6 +153,7 @@
 
   .center-panel {
     width: $main-width;
+    max-width: $main-max-width;
   }
 
   div.card.network {

src/stylesheets/variables.scss

@@ -39,6 +39,7 @@ $sidebar-width: 25%;
 $sidebar-min-width: 235px;
 $sidebar-max-width: 320px;
 $main-width: calc(100% - (max(#{$sidebar-width},#{$sidebar-min-width})));
+$main-max-width: calc(100% - (min(#{$sidebar-width},#{$sidebar-max-width})));
 
 
 // settings for different screen sizes