message: Always use ems for padding
diff: @@ -18,16 +18,12 @@ Input--focus-placeholder()
  Input--error-placeholder()
  color colors-state-alert
  -input.Input
  -input[type='text'].Input
  -input[type='number'].Input
  -input[type='search'].Input
  -textarea.Input
  +.Input
  display block
  width 100%
  appearance none
  padding input-padding
  - border-radius 2px
  + border-radius 0.125em
  color colors-gray-text
  background-color colors-gray-background
  font-size font-size-base
  