Pop up box (with fade)

Hello,

I would like to make a feature I had in mind.

When the user clicks a specified link, a pop up box will appear and the background will fade. The box will contain a lot of information, so maybe it will embed a page or a post? I do not want the box to look like a typical pop up, so no URL or traditional exit (X) button. The user will click outside of the box for it to close.

Any ideas on how to create this? If not, can you please point me in the right direction?

Thanks!