Formula:Numerus articulatus/styles.css

data.articulatio > span {
	margin: auto 0 auto .2em;
}

data.articulatio > span:first-child,
data.articulatio > span.separatrum,
data.articulatio > span.signum + span,
data.articulatio > span.separatrum + span {
	margin: auto 0;
}