Contango is fully responsive. It will adjust itself according to available viewport i.e. desktop, tablet and mobile. You have not shared your site URL, so i am unable to observe it under responsive conditions.
Most users ask about the menu of there site. If your question is also related to Contango menu at Mobile/Tablets than we recommend to use the following free plugin to activate the menu responsive behavior.
Responsive Select Menu – http://wordpress.org/extend/plugins/responsive-select-menu/