import type { ThemeValue } from "../theme.js";
import { type InnerFillStrength } from "../glass-fill.js";
import { type GlassLayer } from "./glass-surface.shared.js";
export declare const GLASS_WASH: {
    /**
     * A field in its error state (Input, Textarea, PhoneInput): the destructive colour. A
     * field's prefix or suffix addon and PhoneInput's country segment paint a `soft` inner
     * fill over the wash, under the same muted ink, so the ink is held on that fill too.
     */
    readonly error: {
        readonly token: "destructive";
        readonly ceiling: 0.18;
        readonly inner: "soft";
    };
    /**
     * A selected card (a selected Card, a checked Radio card): the primary colour, under no
     * inner fill, never denser than the solid recipe's own selected tint (`SELECTED_CARD_TINT`,
     * read from it rather than copied), so the glass card paints what the solid one does.
     */
    readonly selection: {
        readonly token: "primary";
        readonly ceiling: 0.05;
        readonly inner: null;
    };
    /** The contrast the muted and foreground inks keep on a wash: WCAG AA for normal-size text. */
    readonly inkContrast: 4.5;
    /**
     * The headroom the cap is solved with above `inkContrast`. The material samples the real
     * backdrop, which runs a little lighter or darker than the page token the cap is solved
     * on: on the shipped pages a wash solved to exactly 4.5:1 measured 4.47:1 (the errored
     * field's prefix on its addon, dark glass), so the cap is solved at 4.5 plus this.
     */
    readonly headroom: 0.1;
    /** The step the cap is searched in, from the ceiling down. */
    readonly step: 0.01;
};
/** A state wash of the glass model: `error` or `selection`. */
export type GlassWash = "error" | "selection";
/** The pane a wash lies in: its layer, and whether it is a clear (unfrosted) field. */
export interface WashPane {
    layer?: GlassLayer;
    clear?: boolean;
}
/**
 * The under-fill of a pane showing a state wash, legible by construction: the wash's colour
 * over the pane's own body, at the densest alpha up to its ceiling at which the muted and
 * foreground inks keep 4.5:1 composited on the page and on a content pane, and on the wash's
 * inner fill where one is painted over it. Where even the body alone misses that floor (the
 * layer's own legibility, not the wash's), it is the body.
 */
export declare function legibleWash(theme: Pick<ThemeValue, "tokens" | "glass" | "dark">, wash: GlassWash, pane?: WashPane): string;
/**
 * The ink tint a soft inner fill that carries text paints under glass (a field's prefix or
 * suffix addon, PhoneInput's country segment), capped for legibility like a wash (the
 * owner's GS-2 decision): `innerFill`'s tint at the densest alpha up to the strength's own at
 * which the muted and foreground inks keep 4.5:1 plus `GLASS_WASH.headroom`, laid over the
 * pane's body (a clear field's veil, or the control layer's puck) composited on the page and
 * on a content pane. A thinner tint of the ink only ever raises the ink's contrast, so the
 * fill keeps its full strength wherever that already holds, and where even the body alone
 * misses the floor it is no fill at all.
 *
 * The body is the tints as composited, which is what every host paints: the web's frost
 * and the native frost alike paint the pane's tint over their blur
 * (glass-surface-native-frost-self-sample-1), so every host caps the fill
 * (`useTextEntryMaterial`). A native frost's own light or dark veil runs a few levels lighter
 * or darker than the page token the cap is solved on, which only raises the ink's contrast:
 * on the iOS device a dark field's body is #272730 under iOS's dark control tint (white 0.05,
 * ios-tints.ts) and its addon keeps a faint fill (0.04) with the `$` at 5.53:1 on it. At the
 * native set's 0.12, which Android keeps, the body read #373740 there and the addon was capped
 * to no fill, its `$` at 4.91, where the full soft strength read 3.83.
 */
export declare function legibleInnerFill(theme: Pick<ThemeValue, "tokens" | "glass" | "dark">, pane?: WashPane, strength?: InnerFillStrength): string;
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