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: 
You have to set your padding-bottom to 0, and set the border radius bottom to the right and the left of the s-in-mid div.
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.