Friendlier form styles

- Swap out black borders for gray ones

- Add rounded corners to form areas

- Font sizes stay exactly the same.

Before:

<img src="https://api.monosnap.com/image/download?id=X2jvtdsvkop8l7ZBJXsA3ZrDM6UdSH" />

After:

<img src="https://api.monosnap.com/image/download?id=WAv7k9LkH0MRU30HMoMDfRFzHTvSWx" />