/** The type ramp as data, for code that measures text (auto-grow heights, compact inputs, chart labels);
 *  `tokens.css` declares the same ramp, and `tokens_agreement.test.ts` fails when they disagree. Body
 *  rungs carry prose leading (14/24, as `.lotics-markdown`), tightening toward ~1.2 at display sizes —
 *  line-height sets every single line's box, so density was traded for rhythm. Tracking is Inter's own
 *  curve (`TYPE_TRACKING`), in em, so one value serves both breakpoints. */
export interface TypeRung {
    size: number;
    leading: number;
}
/** Below 768px; the display rungs are the ones that grow on desktop. */
export declare const TYPE_RAMP_MOBILE: {
    readonly xs: {
        readonly size: 12;
        readonly leading: 18;
    };
    readonly sm: {
        readonly size: 14;
        readonly leading: 24;
    };
    readonly md: {
        readonly size: 16;
        readonly leading: 26;
    };
    readonly lg: {
        readonly size: 18;
        readonly leading: 28;
    };
    readonly xl: {
        readonly size: 22;
        readonly leading: 28;
    };
    readonly xxl: {
        readonly size: 28;
        readonly leading: 34;
    };
    readonly xxxl: {
        readonly size: 32;
        readonly leading: 38;
    };
};
/** 768px and above (`use_screen_size`). */
export declare const TYPE_RAMP_DESKTOP: {
    readonly xs: {
        readonly size: 12;
        readonly leading: 18;
    };
    readonly sm: {
        readonly size: 14;
        readonly leading: 24;
    };
    readonly md: {
        readonly size: 16;
        readonly leading: 26;
    };
    readonly lg: {
        readonly size: 20;
        readonly leading: 30;
    };
    readonly xl: {
        readonly size: 24;
        readonly leading: 32;
    };
    readonly xxl: {
        readonly size: 32;
        readonly leading: 44;
    };
    readonly xxxl: {
        readonly size: 48;
        readonly leading: 52;
    };
};
export declare const TYPE_LEADING_TIGHT_MOBILE: Record<"lg" | "md" | "sm" | "xl" | "xs" | "xxl" | "xxxl", number>;
export declare const TYPE_LEADING_TIGHT_DESKTOP: Record<"lg" | "md" | "sm" | "xl" | "xs" | "xxl" | "xxxl", number>;
/**
 * Tracking per rung, in em — Inter's own dynamic metrics, not a house curve:
 *
 *     tracking(z) = a + b · e^(c · z)      a = -0.0223, b = 0.185, c = -0.1745
 *
 * evaluated at each rung's base size, rounded to a thousandth. Never tune by eye — fix size or leading
 * instead. `xs` lands at 0.000, which also protects Vietnamese stacked diacritics and Inter's `1`/`l`/`i`
 * at 12px. One value per rung: an em scales, and the curve differs by under 0.002em across a rung's sizes.
 */
export declare const TYPE_TRACKING: {
    readonly xs: 0;
    readonly sm: -0.006;
    readonly md: -0.011;
    readonly lg: -0.014;
    readonly xl: -0.018;
    readonly xxl: -0.021;
    readonly xxxl: -0.022;
};
/** `TextSize` in `text.tsx` is this set. */
export type TypeRungName = keyof typeof TYPE_RAMP_MOBILE;
/** For surfaces with no em unit (a canvas, a chart axis, a raw style object); rounded to a thousandth for
 *  readable snapshots. */
export declare function trackingPx(rung: TypeRungName, size: number): number;