Maybe/app/assets/tailwind/maybe-design-system/border-utils.css

/* Custom shadow borders used for surfaces / containers  */
@utility shadow-border-xs {
  box-shadow: var(--shadow-xs), 0px 0px 0px 1px var(--color-alpha-black-50);

  @variant theme-dark {
    box-shadow: var(--shadow-xs), 0px 0px 0px 1px var(--color-alpha-white-50);
  }
}

@utility shadow-border-sm {
  box-shadow: var(--shadow-sm), 0px 0px 0px 1px var(--color-alpha-black-50);

  @variant theme-dark {
    box-shadow: var(--shadow-sm), 0px 0px 0px 1px var(--color-alpha-white-50);
  }
}

@utility shadow-border-md {
  box-shadow: var(--shadow-md), 0px 0px 0px 1px var(--color-alpha-black-50);

  @variant theme-dark {
    box-shadow: var(--shadow-md), 0px 0px 0px 1px var(--color-alpha-white-50);
  }
}

@utility shadow-border-lg {
  box-shadow: var(--shadow-lg), 0px 0px 0px 1px var(--color-alpha-black-50);

  @variant theme-dark {
    box-shadow: var(--shadow-lg), 0px 0px 0px 1px var(--color-alpha-white-50);
  }
}

@utility shadow-border-xl {
  box-shadow: var(--shadow-xl), 0px 0px 0px 1px var(--color-alpha-black-50);

  @variant theme-dark {
    box-shadow: var(--shadow-xl), 0px 0px 0px 1px var(--color-alpha-white-50);
  }
}

@utility border-primary {
  @apply border-alpha-black-300;

  @variant theme-dark {
    @apply border-alpha-white-400;
  }
}

@utility border-secondary {
  @apply border-alpha-black-200;

  @variant theme-dark {
    @apply border-alpha-white-300;
  }
}

@utility border-tertiary {
  @apply border-alpha-black-100;

  @variant theme-dark {
    @apply border-alpha-white-200;
  }
}

@utility border-divider {
  @apply border-tertiary;
}

@utility border-subdued {
  @apply border-alpha-black-50;

  @variant theme-dark {
    @apply border-alpha-white-100;
  }
}

@utility border-solid {
  @apply border-black;

  @variant theme-dark {
    @apply border-white;
  }
}

@utility border-destructive {
  @apply border-red-500;

  @variant theme-dark {
    @apply border-red-400;
  }
}