TopStyle 5 includes a new style definition for CSS3. This new CSS3 definition is powering many TopStyle features, including the Inspector (Shift+F9), Insight (Ctrl+Space), and Style Checker (F6).CSS3 is great, but not every web browser out there fully supports CSS3 and CSS3 itself has not reached its final release stage. That is why some web browsers require so-called vendor-prefixed properties. The vendor prefixes ensure that there are no clashes with the changing specification and to allow the browser maker to start supporting experimental CSS properties.Of course, keeping up with these vendor-prefixed properties (supporting them, remembering them, etc) is hard. In an ideal world, the web developer should have to focus on standards-compliant CSS properties only.Prefixr to the rescue. Prefixr will filter your (standards-compliant) CSS3 properties and dynamically update them, adding (vendor-prefixed) properties for cross-browser compatibility.
CSS2 allows you to specify a stylesheet for specific media type such as screen or print. Now CSS3 makes it even more efficient by adding media queries. You can add expressions to media type to check for certain conditions and apply different stylesheets. For example, you can have one stylesheet for large displays and a different stylesheet specifically for mobile devices. It is quite powerful because it allows you to tailor to different resolutions and devices without changing the content.