@mixin border {
  border-width: $hairline-border-width;
}

@mixin border-top {
  border-top-width: $hairline-border-width;
}

@mixin border-bottom {
  border-bottom-width: $hairline-border-width;
}

@mixin border-left {
  border-left-width: $hairline-border-width;
}

@mixin border-right {
  border-right-width: $hairline-border-width;
}