/**
 * Selector specificity, computed from selector text.
 *
 * Needed because the CSSOM does not expose it. Under a profile without computed
 * style this decides which declaration wins, so an error here silently changes
 * a snapshot's values rather than crashing — which is why the parser below
 * declines rather than guesses on anything it does not recognize.
 */
export type Specificity = readonly [number, number, number];
export declare function specificityOf(selector: string): Specificity;
/** The most specific branch of a comma-separated selector list. */
export declare function mostSpecific(selectorList: string): Specificity;
export declare function compareSpecificity(a: Specificity, b: Specificity): number;
/**
 * Split on commas that are not inside brackets, parentheses, or strings.
 *
 * `:is(a, b)` and `[title="x, y"]` both contain commas that do not separate
 * selectors. Splitting naively would produce branches that match nothing, which
 * would silently drop real rules from the capture.
 */
export declare function splitSelectorList(selectorList: string): string[];
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