Compass Table Borders

=outer-table-borders($width: 2px, $color: black)
  border: $width solid $color
  thead
    th
      border-bottom: $width solid $color
  tfoot
    th, td
      border-top: $width solid $color
  th
    &:first-child
      border-right: $width solid $color

@mixin outer-table-borders($width: 2px, $color: black) {
  border: $width solid $color;
  thead {
    th {
      border-bottom: $width solid $color;
    }
  }
  tfoot {
    th, td {
      border-top: $width solid $color;
    }
  }
  th {
    &:first-child {
      border-right: $width solid $color;
    }
  }
}

=inner-table-borders($width: 2px, $color: black)
  th, td
    border:
      right: $width solid $color
      bottom: $width solid $color
      left-width: 0px
      top-width: 0px
    &:last-child,
    &.last
      border-right-width: 0px
  // IE8 ignores rules that are included on the same line as :last-child
  // see http://www.richardscarrott.co.uk/posts/view/ie8-last-child-bug for details
  tbody, tfoot
    tr:last-child
      th, td
        border-bottom-width: 0px
    tr.last
      th, td
        border-bottom-width: 0px

@mixin inner-table-borders($width: 2px, $color: black) {
  th, td {
    border: {
      right: $width solid $color;
      bottom: $width solid $color;
      left-width: 0px;
      top-width: 0px;
    };
    &:last-child,
    &.last {
      border-right-width: 0px;
    }
  }
  // IE8 ignores rules that are included on the same line as :last-child
  // see http://www.richardscarrott.co.uk/posts/view/ie8-last-child-bug for details
  tbody, tfoot {
    tr:last-child {
      th, td {
        border-bottom-width: 0px;
      }
    }
    tr.last {
      th, td {
        border-bottom-width: 0px;
      }
    }
  }
}