:is(.dialog) {
  --backdrop-speed: 150ms;
  --panel-size: max-content;
  --speed: 150ms;

  border: 0;
  opacity: 0;
  transform: translateY(50%);
  transform-origin: bottom center;
  transition:
      display var(--speed) allow-discrete,
      opacity var(--speed),
      overlay var(--speed) allow-discrete,
      transform var(--speed);

  &::backdrop {
    background-color: var(--color-ink);
    opacity: 0;
    transform: translateY(0);
    transition:
      display var(--backdrop-speed) allow-discrete,
      opacity var(--backdrop-speed),
      overlay var(--backdrop-speed) allow-discrete;
  }

  &[open] {
    opacity: 1;
    transform: translateY(0);

    &::backdrop {
      opacity: 0.5;
    }
  }

  @starting-style {
    &[open] {
      opacity: 0;
      transform: translateY(50%);
    }

    &[open]::backdrop {
      opacity: 0;
    }
  }
}