Design Question: Change forum radial background dimensions

I think I found a little hack which might not be the best solution but it definitely does what I’m looking for so I’ll document it here, and hope that if this is not a good solution that someone will chime in!

The default CSS for the Suggested topics area at the bottom of the screen is:

.suggested-topics {
    clear: left;
    padding: 20px 0 15px 0;
}

So I added the following to my custom CSS (I didn’t mess with the “clear: left”)…

.suggested-topics {
    padding: 20px;
    background: rgba(255, 255, 255, 0.6);
}

This actually worked pretty well!

Here’s a before and after, on mobile: