.column
  flex: 1 0 0
  padding-right: $gutter
  padding-left: $gutter

  &[class*='is-tablet-'],
  &[class*='is-desktop-'],
  &[class*='is-widescreen-'],
  &[class*='is-ultrawide-']
    // we used flex basis auto to fix grid bug in ie
    flex: 0 0 auto
    // we used min-width with width property
    // to stop FireFox default behavoir
    // when content is bigger than column
    min-width: 100%
    width: 100%

  for $n in (0 .. $columns)
    &.is-{$n},
    &.is-mobile-{$n}
      min-width: round($n / $columns * 100%, $round-digits)
      width: round($n / $columns * 100%, $round-digits)

    &.is-offset-{$n},
    &.is-offset-mobile-{$n}
      margin-{$dir-start}: round($n / $columns * 100%, $round-digits)

  +tablet()
    for $n in (0 .. $columns)
      &.is-tablet-{$n}
        min-width: round($n / $columns * 100%, $round-digits)
        width: round($n / $columns * 100%, $round-digits)

      &.is-offset-tablet-{$n}
        margin-{$dir-start}: round($n / $columns * 100%, $round-digits)

  +desktop()
    for $n in (0 .. $columns)
      &.is-desktop-{$n}
        min-width: round($n / $columns * 100%, $round-digits)
        width: round($n / $columns * 100%, $round-digits)

      &.is-offset-desktop-{$n}
        margin-{$dir-start}: round($n / $columns * 100%, $round-digits)

  +widescreen()
    for $n in (0 .. $columns)
      &.is-widescreen-{$n}
        min-width: round($n / $columns * 100%, $round-digits)
        width: round($n / $columns * 100%, $round-digits)

      &.is-offset-widescreen-{$n}
        margin-{$dir-start}: round($n / $columns * 100%, $round-digits)

  +ultrawide()
    for $n in (0 .. $columns)
      &.is-ultrawide-{$n}
        min-width: round($n / $columns * 100%, $round-digits)
        width: round($n / $columns * 100%, $round-digits)

      &.is-offset-ultrawide-{$n}
        margin-{$dir-start}: round($n / $columns * 100%, $round-digits)

  &.is-middle
    align-self: center

  &.is-top
    align-self: flex-start

  &.is-bottom
    align-self: flex-end

  >.row
    margin: 0 ($gutter * -1)
    min-width: 'calc(100% + %s)' % ($gutter * 2)