CSS Refresh for ageing web app

We need an experienced CSS superstar to take inspiration from our new style sheet and apply this to our old web application. You will need to be able to determine which styles in our old sheet are in use, and create a new style sheet that we overlay on our old app to bring it up to date and make it look shiny and new! You will be supplied with all the existing style sheets, which may need to be split up, and your job is to make our old app look like our new website! of course, your work must be cross browser compatible and this will be validated as part of quality control and user acceptance. There is the possibility of ongoing work depending on your ability to deliver quality work on time and budget.