Why it matters
Margins, paddings and gaps that don't share a base unit create subtle misalignment and uneven rhythm.
How to fix it
Use a 4px-based spacing scale (Tailwind's default) and avoid arbitrary values like p-[13px].
More design rules
void design reports 19 rules in this category. Measured design heuristics from computed styles: font families, type scale, line length, palette and accent sprawl, spacing grid, radius sprawl, dark mode and the tells of generated UI.
multiple-accentsMore than one accent huegradient-textGradient-filled heading textpurple-gradientPurple/indigo gradient backgroundemoji-iconsEmoji used as iconsradius-sprawlToo many different corner radiino-dark-modeNo dark mode supportcolor-scheme-missingcolor-scheme is not declaredselection-unstyled::selection is not styled