add shadow to the main container

Dear,
I have a boxed site. In order to better show the box, I want to add a kind of shadow/emboss to the edges (the wrapper). I already did something similar with another theme by adding this css:
#wrapper {
-webkit-box-shadow: 0px 0px 30px 0px rgba(0, 0, 0, 0.30);
-moz-box-shadow: 0px 0px 30px 0px rgba(0, 0, 0, 0.30);
box-shadow: 0px 0px 30px 0px rgba(0, 0, 0, 0.30);
}

However, in Enfold I cannot find the name of the entity which is the entire box. I tried “.container_wrap{…” but it only added shadow to some containers. I want something like in http://p1.capital-experts.com/
Please help

Regards,
Nabil