/**
 * `backgroundColor` -> `background-color`, `WebkitLineClamp` ->
 * `-webkit-line-clamp`. Custom properties (`--brand`) pass through untouched.
 */
export declare function toKebabCase(property: string): string;
/**
 * Numbers become `px` unless the property is unitless or the value is zero.
 * Everything else is stringified as-is.
 */
export declare function normalizeValue(property: string, value: string | number): string;
/**
 * Renders one declaration's value. Arrays become CSS fallbacks — the caller
 * emits one declaration per entry, in order, so the last supported one wins.
 */
export declare function normalizeValues(property: string, value: string | number | readonly (string | number)[]): string[];