message: Q/A button hover states
diff: // States
  // ------
  &:hover
  - background-color colors-gray-hover
  - border-color @background-color
  - color white
  + border-color colors-gray-hover
  &:active
  // Annoyingly: have to set the border width/style/color here
  color colors-state-alert
  border-color lighten(@color, 75%)
  &:hover
  - background-color @color
  - color white
  + border-color @color
  &[data-state='loading']
  position relative
  