/**
 * Typography Utilities for Relative Font Sizing
 *
 * This module provides utilities for creating scalable font sizes
 * based on a configurable base size. All font sizes are derived
 * from the base using ratios, enabling easy accessibility scaling.
 *
 * @example
 * // Default sizing (base = 14px)
 * const sizes = createFontSizes(); // tn=10px, xs=12px, sm=14px, xl=18px
 *
 * // Large accessibility mode (base = 16px)
 * const largeSizes = createFontSizes(16); // tn=11.4px, xs=13.7px, sm=16px, xl=20.6px
 */
/**
 * Default base font size in pixels.
 * This matches the current production value.
 */
export declare const DEFAULT_BASE_FONT_SIZE = 14;
/**
 * Font size ratios relative to base.
 * These ratios are calculated to match the current pixel values
 * when base = 14px:
 * - tn: 10px → 10/14 = 0.714 (tiny)
 * - xs: 12px → 12/14 = 0.857
 * - sm: 14px → 14/14 = 1.0
 * - base: 14px → 14/14 = 1.0
 * - md: 14.5px → 14.5/14 = 1.036
 * - lg: 15px → 15/14 = 1.071
 * - xl: 18px → 18/14 = 1.286
 */
export declare const FONT_SIZE_RATIOS: {
    readonly tn: number;
    readonly xs: number;
    readonly sm: number;
    readonly base: number;
    readonly md: number;
    readonly lg: number;
    readonly xl: number;
};
/**
 * Font size preset names for common accessibility configurations.
 */
export declare const FONT_SCALE_PRESETS: {
    readonly compact: 12;
    readonly normal: 14;
    readonly comfortable: 16;
    readonly large: 18;
};
export type FontScalePreset = keyof typeof FONT_SCALE_PRESETS;
/**
 * Typography configuration options.
 */
export interface TypographyConfig {
    /**
     * Base font size in pixels. All other sizes are derived from this value.
     * @default 14
     */
    baseFontSize?: number;
}
/**
 * Generated font sizes type.
 */
export interface FontSizes {
    tn: string;
    xs: string;
    sm: string;
    base: string;
    md: string;
    lg: string;
    xl: string;
    icons: string;
}
/**
 * Creates font sizes based on a configurable base size.
 * All sizes are calculated using ratios relative to the base.
 *
 * @param baseFontSize - The base font size in pixels (default: 14)
 * @returns Font sizes object with pixel values as strings
 *
 * @example
 * // Default (14px base)
 * createFontSizes();
 * // { tn: '10px', xs: '12px', sm: '14px', base: '14px', md: '14.5px', lg: '15px', xl: '18px', icons: '24px' }
 *
 * @example
 * // Large accessibility mode (16px base)
 * createFontSizes(16);
 * // { tn: '11.4px', xs: '13.7px', sm: '16px', base: '16px', md: '16.6px', lg: '17.1px', xl: '20.6px', icons: '24px' }
 */
export declare function createFontSizes(baseFontSize?: number): FontSizes;
/**
 * Creates font sizes from a preset name.
 *
 * @param preset - The preset name ('compact', 'normal', 'comfortable', 'large')
 * @returns Font sizes object with pixel values as strings
 *
 * @example
 * createFontSizesFromPreset('large');
 * // { tn: '12.9px', xs: '15.4px', sm: '18px', base: '18px', md: '18.6px', lg: '19.3px', xl: '23.1px', icons: '24px' }
 */
export declare function createFontSizesFromPreset(preset: FontScalePreset): FontSizes;
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