In mobile layout I want "Widget:First Sidebar" to be above the content not below

In this theme I have a small logo used under the (Matheson) Image & Text widget for the first sidebar, just to the left of my content paragraph. What I want is when it is in the mobile view and I decrease the size of my viewport I want the logo in the widget to be above my block text not below it, and centered if possible. How could I go about doing this, should I go into the style sheets and if so which one?