@mixin media($size) {
  @if $size == small {
    @media (max-width: 600px) { @content ; }
  }
  @else if $size == medium {
    @media (max-width: 800px) { @content ; }
  }
  @else if $size == large_min {
    @media (min-width: 801px) { @content ; }
  }
  @else if $size == large {
    @media (max-width: 1280px) { @content ; }
  }
  @else if $size == xlarge {
    @media (min-width: 1690px) { @content ; }
  }
}