//! What a balloon looks like: its shape channel, and the affect that tints it.
use ;
/// Balloon style — drives both the drawn shape and the semantic channel.
/// Optional affect on a line — tints the balloon border.
///
/// Grounded in An et al., *AniBalloons* (arXiv:2408.06294): balloon colour and animation reliably
/// convey emotion, which is why this is a first-class axis rather than something a caller bakes into
/// its own colour choice.