import * as NodeFS from "node:fs"; import type { MobileThemeAppearance, MobileThemeVariables } from "./mobileTheme"; export function readDefaultMobileThemeVariables(  appearance: MobileThemeAppearance,): MobileThemeVariables {  const stylesheet = NodeFS.readFileSync(new URL("../../global.css", import.meta.url), "utf8");  const variant = new RegExp(`@variant ${appearance} \\{([\\s\\S]*?)\\n    \\}`, "u").exec(    stylesheet,  )?.[1];  if (variant === undefined) throw new Error(`Missing default ${appearance} theme in global.css.`);   return Object.fromEntries(    Array.from(variant.matchAll(/(--color-[a-z0-9-]+):\s*([^;]+);/gu), ([, name, value]) => [      name,      value.trim(),    ]),  ) as MobileThemeVariables;}