import { type Color } from './colors';
export type SideStyle = 'none' | 'thin' | 'medium' | 'thick' | 'double' | 'hair' | 'dotted' | 'dashed' | 'dashDot' | 'dashDotDot' | 'mediumDashed' | 'mediumDashDot' | 'mediumDashDotDot' | 'slantDashDot';
export declare const SIDE_STYLES: ReadonlyArray<SideStyle>;
export interface Side {
    readonly style?: SideStyle;
    readonly color?: Color;
}
/** Build an immutable {@link Side}. */
export declare function makeSide(opts?: Partial<Side>): Side;
export interface Border {
    /** Left edge. */
    readonly left?: Side;
    readonly right?: Side;
    readonly top?: Side;
    readonly bottom?: Side;
    /** Diagonal stroke (governed together with diagonalUp / diagonalDown). */
    readonly diagonal?: Side;
    /** Vertical stroke between cells of a merged range. */
    readonly vertical?: Side;
    /** Horizontal stroke between cells of a merged range. */
    readonly horizontal?: Side;
    readonly diagonalUp?: boolean;
    readonly diagonalDown?: boolean;
    /** Outline-only flag; defaults to true. */
    readonly outline?: boolean;
}
/** Build an immutable {@link Border}. */
export declare function makeBorder(opts?: Partial<Border>): Border;
/** Default empty side — convenient sentinel for `no edge stroke`. */
export declare const EMPTY_SIDE: Side;
/** Default empty border — every cell starts here until styled otherwise. */
export declare const DEFAULT_BORDER: Border;
/**
 * Translate a {@link Border} to a CSS-property record suitable for HTML
 * preview. Each present side becomes `border-<edge>: <width> <style> <#color>`.
 * Theme/auto/missing colours fall back to `currentColor`. Diagonal / vertical /
 * horizontal sides are skipped (CSS has no native equivalent for in-cell
 * strokes). Empty Border returns `{}`.
 */
export declare function borderToCss(border: Border | undefined): Record<string, string>;