[css]

Semi-related, one of the `imessage-exporter` contributors provided a great write-up on reverse engineering the handwritten and digital touch message protobufs [0]. The reconstructed proto files are [1] [2].

[0]: https://github.com/trymoose/handwriting2svg/blob/0eb56cf4582...

[1]: https://github.com/ReagentX/imessage-exporter/blob/beeb853b2...

[2]: https://github.com/ReagentX/imessage-exporter/blob/beeb853b2...