Responsive web design with Sass 3.2 alpha

gistfile1.sass

.top-block-switcher-item
  +responsive-layout-unit

  cursor: pointer

  border: 5px solid $background-white
  +border-radius(3px)

  +respond-to(desktop)
    width: 15.25%
    margin: -5px -10px 0 -5px

    & + &
      margin-left: 1.7%

  +respond-to(below-desktop)
    border-width: 3px
    margin: -3px -6px 0 -3px

  +respond-to(tablet)
    width: 15.6%

    & + &
      margin-left: 1.279%

  +respond-to(mobile)
    width: 31.66666%

    & + &
      margin-left: 2.66666%

    // &:nth-last-child(-n+3)
    & + & + & + &,
    & + & + & + & + &,
    & + & + & + & + & + &
      display: none