@mixin for-phone-only {
  @media (max-width: 599px) { @content; }
}
@mixin for-tablet-portrait-up {
  @media (min-width: 600px) { @content; }
}
@mixin for-tablet-landscape-down {
  @media (max-width: 899px) { @content; }
}
@mixin for-tablet-landscape-up {
  @media (min-width: 900px) { @content; }
}
@mixin for-desktop-up {
  @media (min-width: 1200px) { @content; }
}
@mixin for-big-desktop-up {
  @media (min-width: 1800px) { @content; }
}

@mixin for-retina-2 {
  @media screen and (-webkit-min-device-pixel-ratio: 2), only screen and (min-resolution: 192dpi), only screen and (min-resolution: 2dppx) { @content; }
}

@mixin for-retina-3 {
  @media screen and (-webkit-min-device-pixel-ratio: 3), only screen and (min-resolution: 288dpi), only screen and (min-resolution: 3dppx) { @content; }
}
