import type { BrandPaletteSource, ColorScale, SemanticColors, SidebarTokens } from "../types";
/** WCAG 1.4.3 — the active label is normal-size text. */
export declare const AA_NORMAL_TEXT = 4.5;
/** Lightest surface an active row reaches: Chakra `whiteAlpha.400` (0.24) on hover. */
export declare const ACTIVE_SURFACE_TINT = "#ffffff3d";
export declare const sidebarActiveSurface: (background: ColorScale) => string;
/** Lightest a row ever gets on ANY rail surface — what chrome inside a row must clear. */
export declare const sidebarRowPeak: (surface: string) => string;
/** Stronger than the divider — a hover fill must read as an action, not a rule. */
export declare const HOVER_SURFACE_TINT = "#ffffff20";
/** Chakra whiteAlpha.100 (0.06) — a divider only needs to read, not shout. */
export declare const DIVIDER_SURFACE_TINT = "#ffffff0f";
export declare const sidebarHoverSurface: (background: ColorScale) => string;
export declare const sidebarDivider: (background: ColorScale) => string;
/** The rail never inverts, so both modes take the accent from the LIGHT primary. */
export declare const buildSidebarTokens: (background: ColorScale, lightPrimary: ColorScale, semantic: SemanticColors) => SidebarTokens;
export declare const withSidebarTokens: (source: BrandPaletteSource) => SidebarTokens;