Style block menus inside Header top left, Header top right and Header right regions - http://drupal.org/node/1954560

Initialize jQuery Responsive Menu Plugin which turns your site's navigation into a dropdown (<select>)

Move responsive navigation style rules from layout.css to style.css - http://drupal.org/node/1918946

Move all form buttons style rules from style.css to another stylesheet (buttons.css) - http://drupal.org/node/1917758

Add jQuery Responsive Menu Plugin which turns your site's navigation into a dropdown (<select>) - http://drupal.org/node/1918948

Add Navigation links color inside colors stylesheet (color/colors.css) after drop-down menus support - http://drupal.org/node/1918944

http://drupal.org/node/1701402 Responsive Image - Make the image auto resize to the max width of the boundary by using max-width:100% and height:auto