Spacing
Margin, padding and gap off the 4px ladder — never a raw px.
| Class | Does |
|---|---|
.u-m-0 / .u-m-auto / .u-mx-auto | margin resets and centering |
.u-mt-1…16 / .u-mb-1…12 | block margins on the ladder |
.u-ms-auto / .u-me-auto | logical push (flex rows) |
.u-p-0…8 / .u-px-* / .u-py-* | padding |
.u-gap-1…8 | flex/grid gaps |
p-1p-2p-3p-4p-6p-8
the padding ladder, felt