@mixin theme-dark {
  @media (prefers-color-scheme: dark) {
    page,
    .sar-portal {
      @content;
    }
  }

  /* #ifdef WEB */
  :root[data-sard-theme='dark'] page,
  :root[data-sard-theme='dark'] .sar-portal {
    @content;
  }
  /* #endif */
}