What is the earliest version of Internet Explorer that supports border-radius?

All properties must have a:

What does this selector do? ul ~ p { color: red; }

Which of these is not a valid CSS3 color value?

Portrait and Landscape specific stylings are used for:

rgba differs from the opacity declaration in that:

If a layout is created in a PSD with blue buttons in the nav, then it would be best for the speed of the page to:

What line of HTML would you use to reference an external style sheet?

In CSS3 it is possible to specify the size of the background image...

Which is correct use of border-radius?

Which of the following is NOT a feature of CSS3: