Elegant Responsive theme is a very simple and minimal themes for elegant works. It's completely responsive (also images) and mobile ready.
It provides 2 layout, the default template with sidebar and a wide template without sidebar.
Demo of the theme here: http://lucamusolesi.altervista.org/Elegant/
Unzip the file in your theme folder and activate the theme. You can change the logo replacing the file logo.png in the folder images inside the theme's folder.