adapt css for mobile phone navigation and other modifications

Hi, The website is already existing htt ://[login to view URL] but the menu is not displaying correctly on smartphones. It should work fine in Windows Phone, android and iphone. There's also, some modifications to do on website (look at lamarcairie-home [login to view URL] file) For the menu navigations, there's 2 options depending on rices and advises. Option 1 : optimize the existing navigation menu for smart phones (reduce, font-size, adding, …?). Increasing size of logos and adapt positions. ([login to view URL]) Option 2 : create a rolling smart phone menu with submenus. I don't want to change all content, just the header with logos and menu. Of course, compatible all smart phones. ([login to view URL]) Regards Chris