Expert CSS needed for making our application look better (easy !!!)

We are a software company developing an ASP.NET web application. We need help on making our app looking nice, so a CSS expert is urgently needed to make DIVs & CLASSES in CSS for us. We have examples of web applications that we would like to imitate in look and feel. We need a CSS file (or couple of them) to attach to our application. ## Deliverables The CSS file or files delivered must be well documented to be easly understood by software developers. Classes delivered must well and efficiently structured.