#content-container

 

Essentially, the container that holds all the content except for the header.

The following illustrations show: 

  1. The #content-container style before applying CSS changes.
  2. The #content-container style after the border property has been changed to a 10-point solid green line.
     

Default CSS

Modified CSS

#content-container {
 padding: 25px 0 0 0;
}
 

#content-container {
 padding: 25px 0 0 0;
 border: 10px solid green;
}