Welcome to the LayoutCSS tutorial ! This will teach you everything you need to know to easily build responsive layout.
Your first utility !
A utility is a small, single-purpose class that applies a specific style or behavior to an element.
In LayoutCSS there are some utilities and the most simple is the p utility which add a padding to an element.
With LayoutCSS you dont add classes but layout classes, it means you will add utilities in the layout attribute.
Try to add p:1 to the layout attribute of the span to add it a padding of 1 on the harmonic scale (we will discus about it later).
There are some variant of it like px, py, pt, pb, pr, pl.