/** The two color schemes the platform reports. iOS `unspecified` and
 *  Android `UI_MODE_NIGHT_UNDEFINED` both collapse to `'light'` at the
 *  native publisher boundary so JS only ever sees these two values. */
export type ColorScheme = 'light' | 'dark';
/** Tint of system-bar *content* (clock, icons), not its background. */
export type SystemBarStyle = 'light' | 'dark';
/** Result envelope returned by every native setter. */
export interface SetterResult {
    ok: boolean;
    /** Present when `ok === false` — `'unsupported'` on iOS for nav-bar and
     *  status-bar-background calls, or an Android failure message. */
    reason?: string;
}
/** Argument to `setSystemBarsStyle` — partial; omitted fields are left alone. */
export interface SystemBarsStyleInput {
    /** Status-bar content tint. `'light'` = light icons (legible on dark bg). */
    statusBar?: SystemBarStyle;
    /** Android only — status-bar background color. `null` clears (transparent). */
    statusBarBackground?: string | null;
    /** Android only — navigation-bar tint + optional background. */
    navigationBar?: {
        style: SystemBarStyle;
        color?: string;
    };
}
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