when will it be safe to develop for CSS3

i'm beginning a new sit开发者_高级运维e and i want to use CSS3 features but i don't want to start something if its not in or going to be widely used

---

There are varying levels of support for various features, and browsers are being pretty good about keeping support in vendor prefix properties until specifications stabilize.

So long you build with progressive enhancement in mind, it is safe now.