Incorrect theme for code blocks in light mode

I followed the steps:

npx @docusaurus/init@latest init docs classic
cd docs
npm docusaurus start

Then I realized that the code blocks had a dark theme, unlike the rest of the project. If I switch to dark mode everything will change, except for the code blocks that remain the same.

1. My project in light mode: https://i.imgur.com/ayshMzw.png
2. My project in dark mode: https://i.imgur.com/Dz474na.png

I would like the theme to be the same as that shown on the official website in which the code blocks respect the light theme.

1. Docusaurus website in light mode: https://i.imgur.com/YVUn2G5.png
2. Docusaurus website in dark mode: https://i.imgur.com/aTvQXkn.png

[slorber]

I believe this is documented: https://docusaurus.io/docs/markdown-features/code-blocks#line-highlighting

You have to use custom CSS and define your own highlighting color.

[slorber]

We could do both, do you want to open a PR?

That seems reasonable to improve the discoverability of the code block theming