Header level 1 looks the same as level 2 on devlogs

[antoniobuch]

Describe the bug
When applying header labels on devlog's texts, the <h1> looks the same size as <h2>.

To Reproduce
Steps to reproduce the behavior:

1. Create a new devlog on a project
2. Write two text lines
3. Highlight one line, click the ¶ Format button, and select "Heading 1"
4. Highlight the other line, click the ¶ Format button, and select "Heading 2"
5. Click "Save" at the bottom
6. In the post's preview, you'll see both headers look the same

Expected behavior
The Heading 1 must be bigger than Heading 2. If you see the post's HTML code, the header tags are indeed <h1> and <h2>.

Screenshots
The text on the visual editor, the HTML editor, and the final post.

Desktop:

• OS: Windows 10
• Browser Firefox and Chrome
• Version Firefox v130, Chrome v128

Additional context
The potential bug doesn't happen in posts not linked to a project (the ones you make via Dashboard>Posts>New post)
You can check the post where the screenshots come from HERE