Question: I'm not sure if I should be using `overflow` or something else to fix this, but would appreciate any help I could get.

Scroll to the very bottom of the page. You will see at the very bottom where there's the black div and right below that is a little white space.

How can make that white space become black and still keep the rounded corners?

Answer: 
1. Set bottom padding of `.s-inn-mid` to 0
2. Add bottom left and right border-radius 5px to the black div.
`border-radius: 0 0 5px 5px`

I'd tell you it exactly in terms of classes and ids, but you are using inline styles (GROSS), so that's unfortunately not possible.
Change this:

```
.s-inn-mid {
  padding: 7px 0px 6px 0px;
  ...

```

to this:

```
.s-inn-mid {
  padding: 7px 0px 0px 0px;
  ...

```

FYI, this has nothing to do with `overflow`. You simply had padding on the bottom of your container div.