import { type ColorTokens } from "./tokens.js";
/**
 * The Android ripple of a content surface (a card, a list row, a tile): a neutral ink,
 * the foreground at low alpha so it reads in both schemes, bounded to the surface. iOS
 * and the web ignore it and dim instead (`pressDim`).
 */
export declare function surfaceRipple(tokens: ColorTokens): {
    color: string;
    borderless: boolean;
};
/**
 * The Android ripple of a round or icon-sized control (an avatar, an icon button): the
 * same neutral ink, borderless, so it radiates from the touch point rather than filling
 * a rectangle.
 */
export declare function controlRipple(tokens: ColorTokens): {
    color: string;
    borderless: boolean;
};
/**
 * The press dim of iOS and the web: the given opacity while pressed (0.9 by default), and
 * null on Android, where the ripple carries the press and a dim would signal it twice.
 */
export declare function pressDim(pressed: boolean, opacity?: number): {
    opacity: number;
} | null;
/**
 * The opacity each platform's own disabled controls take (the hand-off's
 * `--p-disabled`): 0.4 on iOS, Material 3's 0.38 on Android and 0.5 on the web, for a skin
 * one component shares across every platform. Evaluated once in the platform's own bundle;
 * `os` is for tests.
 */
export declare function platformDisabledDim(os?: string): number;
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