CSS changes not reflecting on my Blog, What to do?

I have added a Lead Capture form (7 Great Lies Of Network Marketing) on my blog - www.vineetgupta.net

The HTML that I copied & pasted in Text Widget is coming up in the Sidebar.

But its formatting/ CSS is not showing up. What could be the reason?

(I have tried it in localhost, its working fine there, with the same theme.)

Poster :
Vineet Gupta