SoulTrade Responsive Theme Examples
click Gallery (or the cat) and have a look
very rough but they give you an idea perhaps
5 styles - with Desktop and Mobile/Tablet views for each
working examples from the Links on the left (pull or pinch your Browser window from its bottom corner, to replicate a mobile or tablet and see how the themes respond)
About the only thing you can't do is ignore them. Because they change things.