some css confusion and help needed

howdy, using the Version 2.0.1 and Steam Theme.

So, the issue:

I've added some css to add shadows and depth for the pages. I picked up the code from various support replies within the forum

I've added the following to SimpleCSS

.generate-sections-inside-container {
border: 5px solid rgba(232, 234, 237, 1);
box-shadow: 0 0 10px rgba(232, 234, 237, 0.5);
}
.section-border {
border: 2px solid #000;
}
.inside-article {
box-shadow: 0 10px 10px #C0C0C0;
}

I need help in extending the end/bottom of the page shadow so that the content does not appear tight. I'm attaching links to view this on my site.