Margins and Paddings
You should use a multiple of the magic unit as margins and paddings
You should remove border sizes from the vertical paddings values
Removing border sizes from vertical paddings
For exemple, take a button. If your button have a 2x magic-unit height (32px) you have :
- 1px borders
- 1.5x magic-unit line-height
- your padding top and bottom would be 0.25x magic-unit minus 1px