My problem was not with the same extensive width but with containing the text within a narrower sidebar.
I tried this code in the cirruscloud.css file as has been suggested by another member-
#cirrusCloudWidget {
overflow: hidden;
}
This kept the text hidden to the left but not the right.
I tinkered with two items and ended up with a pretty good fit:
1. Extended the sidebar proportion in the style.css file to 23% from 20%
2. Replaced the overflow:hidden; with margin-left:13px; in the cirruscloud.css file
The containment can be seen in the left sidebar of my site
