Add styling to details tag

[lamATnginx]

Proposed changes

Closes https://github.com/nginxinc/docs-platform/issues/477

Before:

After:

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING document
• If applicable, I have added tests that prove my fix is effective or that my feature works
• If applicable, I have checked that any relevant tests pass after adding my changes
• I have updated any relevant documentation (README.md and CHANGELOG.md)

[danielledeleo]

Please add a page to the example site and a screenshot to the PR.

Looks like it breaks sidebar positioning somehow:

Screen.Recording.2025-04-25.at.9.13.52.AM.mov

[lamATnginx]

Please add a page to the example site and a screenshot to the PR.

Looks like it breaks sidebar positioning somehow:
Screen.Recording.2025-04-25.at.9.13.52.AM.mov

The sidebar position is not really breaking as it is following the positioning of being sticky. Before expanding, there is not that much space since I assume the footer is visible in your case, but after expanding, the height of the page increases, so the sidebar also does since it is given more space for sticky to work.

[danielledeleo]

Right, ok. Doesn't feel great though.

Changes made