Many web designers add shadow to content box to make it more stand out and also look good. If you’d like to have it on your site, I found a tutorial on how to create nice box shadows using CSS3.
The tutorial about CSS3 that I found will show you the sample CSS3 code for creating CSS3 content box shadows in 8 different styles use only CSS without image. Hit the link below for the tutorial or view the demo.
Link: Creating Different CSS3 Box Shadows Effects