@custom-selector :--heading h1, h2, h3, h4, h5, h6;
@custom-selector :--heading h1, h2, h3, h4, h5, h6;
@custom-selector :--heading h1, h2, h3, h4, h5, h6;
@custom-selector :--heading h1, h2, h3, h4, h5, h6;
@custom-selector :--heading h1, h2, h3, h4, h5, h6;
@custom-selector :--heading h1, h2, h3, h4, h5, h6;
@custom-selector :--heading h1, h2, h3, h4, h5, h6;
@custom-selector :--very-very-very-very-very-very-very-very-very-long-selector-name
  h1,
  h2,
  h3,
  h4,
  h5,
  h6;
@custom-selector :--very-very-very-very-very-very-very-very-very-long-selector-name
  h1 + h1,
  h2,
  h3,
  h4,
  h5,
  h6;
@custom-selector :--very-very-very-very-very-very-very-very-very-long-selector-name
  .very-very-very-very-very-very-very-very-very-long-selector-name
    + very-very-very-very-very-very-very-very-very-long-selector-name-other,
  h2,
  h3,
  h4,
  h5,
  h6;
@custom-selector :--very-very-very-very-very-very-very-very-very-long-selector-name
  h1 h1,
  h2,
  h3,
  h4,
  h5,
  h6;
@custom-selector :--heading
  .very-very-very-very-very-very-very-very-very-very-long-class-name,
  .very-very-very-very-very-very-very-very-very-very-long-class-name-other;
@custom-selector :--enter :hover, :focus;
@custom-selector :--visible :global.visible;
@custom-selector :--icon i[class^="icon-"], i[class*=" icon-"];
@custom-selector :--placeholder
  :placehoder-shown,
  ::-webkit-input-placeholder,
  ::-moz-placeholder,
  :-ms-input-placeholder;
@custom-selector :--enter :matches(:hover, :focus, :active);