fix: Don't enable dark theme by default - fixes PDF

Author: Claudemirovsky

vitepress/src/.vitepress/config.mts

@@ -6,7 +6,6 @@ export default defineConfig({
     lang: "pt-BR",
     metaChunk: true,
     base: "/handbook-competitive-programming/",
-    appearance: "dark",
     title: "Competitive Programming Handbook",
     description: "De competidores, para competidores.",
     themeConfig,