4×4
Columns
A 4 × 4 structure gives 12 columns. It scales down to 6, 4, 3 or 2 for smaller, narrower, extra-wide or tall formats.
4%
Margins
Margins are 4% of the format's shortest side, rounded to a multiple of 4.
2×4%
Gutter
The gutter is twice the margin. Rules sit at its centre, so the space either side of every line is equal. Cards take half.
0px
Corners
HUX is square. A rounded system uses 30% of an element's shortest side; HUX keeps the rule and sets it to zero. Status chips are the one exception.