import type { Root } from 'postcss';
import type { KeyValuePair, PluginAPI } from 'tailwindcss/types/config';
export declare const addVariant: (api: PluginAPI, variant: string, definition: string | string[] | ((extra: {
    container: Root;
}) => string | string[])) => void;
export declare const matchVariant: <T = string>(api: PluginAPI, name: string, cb: (value: T | string, extra: {
    modifier: string | null;
    container: Root;
}) => string | string[], options?: {
    values?: KeyValuePair<string, T>;
    sort?(a: {
        value: T | string;
        modifier: string | null;
    }, b: {
        value: T | string;
        modifier: string | null;
    }): number;
}) => void;
export declare const addVariantWithModifier: (api: PluginAPI, variant: string, fn: (extra: {
    container: Root;
    modifier: string | null;
}) => string | string[]) => void;