Applying CSS to the report is not possible since this feature would have been available only in the HTML rendering. Therefore in order to preserve the consistency between the rendering extensions and the report viewers Telerik Reporting has its own way of styling the reports, which is much like the CSS way.
For more information regarding the styling of the report please check this help article
Having this in mind:
- You will have to change the report definition itself, which is not possible with CSS.
- This is not possible since the report is placed in an iframe.
- You can change the design of the report by using Report Parameters, which will be the equivalent of media queries in Telerik Reporting.
the Telerik team
Have you tried the new visualization options in Telerik Reporting Q1 2013? You can get them from your account.