HTML/CSS conversion to HTML5/CCS3

We have a legacy HTML/CSS pages that we need to export to HTML5/CSS3 key points -50 pages -with a responsive layout compatible for tablets and mobile screens no framework and knowledge of media query - homepage:1 page / category 5 pages / content: 45 pages -You can modify the jquery / javascript but its mandatory to provide a documentation regarding any modifications done on the JS files and why - Browser compatibility IE7, IE8, IE9 Firefox current version + previous version - v15 & v14 Chrome current version + previous version - v22 & v21 Safari pc Mobile Safari Chrome mobile mobile landscape mobile portrait tablet landscape tablet portrait