@mixin desktop {
  @media (min-width: 961px) {
    @content;
  }
}

@mixin tablet {
  @media (min-width: 641px) and (max-width: 960px) {
    @content;
  }
}

@mixin mobile {
  @media (max-width: 640px) {
    @content;
  }
}