:where(html) {
  /* Square aspect ratio. */
  --sds-g-ratio-square: 1;
  /* Landscape aspect ratio. */
  --sds-g-ratio-landscape: 4/3;
  /* Portrait aspect ratio. */
  --sds-g-ratio-portrait: 3/4;
  /* Widescreen aspect ratio. */
  --sds-g-ratio-wide: 16/9;
  /* Ultra Widescreen aspect ratio. */
  --sds-g-ratio-ultrawide: 18/5;
}