/**
 * All widget CSS, injected once into the shadow root. `:host { all: initial }`
 * isolates us from host-page styles.
 *
 * Design language: "the inspection mark" — a semantic token system on :host
 * (ink/paper/surface2/line/accent), light + dark values switched by a
 * tk-light / tk-dark class on the host element, two type voices (mono for
 * machine facts, sans for human words), and reticle-style pins. The accent is
 * parameterised; text ON the accent always uses the auto-contrast ink.
 */
/**
 * Auto-contrast: pick the text colour to use ON the accent from its relative
 * luminance (simple sRGB weighting). Light accents get dark ink, dark accents
 * get white. Non-hex colours fall back to white (previous behaviour).
 */
export declare function accentInk(accent: string): string;
export declare function styles(accent: string): string;