Base Styles: Reduce specificity of body selector

[arthur791004]

Fixes Automattic/wp-calypso#89631
Related to WordPress/gutenberg#60106, p1713865028094699-slack-CDLH4C1UZ

Proposed changes:

Referring to WordPress/gutenberg#60106, it would be better to reduce the specificity of the body selector on Jetpack to avoid the styles of the font family being overridden. I'm unsure of the purpose of the body styles but I guess we can consider removing them later

Here is the result of Bedrock theme:

Other information:

• Have you written new tests for your changes, if applicable?
• Have you checked the E2E test CI results, and verified that your changes do not break them?
• Have you tested your changes on WordPress.com, if applicable (if so, you'll see a generated comment below with a script to run)?

Jetpack product discussion

Does this pull request change what data or activity we track or use?

Testing instructions:

• Follow Base Styles: Reduce specificity of body selector #37043 (comment) to apply the changes on your site
  • You have to apply this branch to Jetpack & Jetpack VideoPress on atomic sites
• Remember to disable the cache before getting started
• Go through pages under the Jetpack
• Make sure the styles look good
• Activate any of these themes: Kingsley, Arbutus, and Geologist (or probably any theme).
• Create a new post
• Add a paragraph with sample text.
• Make sure the fonts are rendered correctly
• Go to the Site Editor
• Add jetpack blocks
• Make sure the styles of jetpack blocks look good

[github-actions]

Are you an Automattician? Please test your changes on all WordPress.com environments to help mitigate accidental explosions.

• To test on WoA, go to the Plugins menu on a WordPress.com Simple site. Click on the "Upload" button and follow the upgrade flow to be able to upload, install, and activate the Jetpack Beta plugin. Once the plugin is active, go to Jetpack > Jetpack Beta, select your plugin, and enable the feat/reduce-specificity-of-body-selector branch.

• To test on Simple, run the following command on your sandbox:

  bin/jetpack-downloader test jetpack feat/reduce-specificity-of-body-selector
  

Interested in more tips and information?

• In your local development environment, use the jetpack rsync command to sync your changes to a WoA dev blog.
• Read more about our development workflow here: PCYsg-eg0-p2
• Figure out when your changes will be shipped to customers here: PCYsg-eg5-p2

[github-actions]

Thank you for your PR!

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[taipeicoder]

@arthur791004 I added a post using the Bedrock theme and the fonts render fine. The post also has Jetpack blocks. See https://griffithchen01.blog/2024/04/24/site-title/
Am I missing anything?

[arthur791004]

I added a post using the Bedrock theme and the fonts render fine. The post also has Jetpack blocks. See https://griffithchen01.blog/2024/04/24/site-title/
Am I missing anything?

Do they render correctly in the post editor?

[taipeicoder]

I added a post using the Bedrock theme and the fonts render fine. The post also has Jetpack blocks. See https://griffithchen01.blog/2024/04/24/site-title/
Am I missing anything?

Do they render correctly in the post editor?

Thanks, I was testing the Front End 😄

[taipeicoder]

Works as intended!

Before	After