.$_el .x-particle {
  width: $particle_width;
  height: $particle_height;
  @unless $particle_border_radius?? {
    border-radius: $particle_border_radius;
  }
  color: $particle_color;
  transform-origin: $particle_transform_origin;
}

.$_el .x-particle[class*="active"] {
  @unless $particle_delay?? {
    transition-delay: $particle_delay;
  }
}