Style is applying to everything if the style only contains a subnode

Problem encountered when doing this:
```
starterStyle = [style|
  a {
    text-decoration: underline;
  }
|]
```
The style applied to the div instead of to `a`.  Fixed by doing
```
starterStyle = [style|
  font-size: inherit;
  a {
    text-decoration: underline;
  }
|]
```
But obviously that's not a real fix