Have you read the Contributing Guidelines on issues?

• I have read the Contributing Guidelines on issues.

Prerequisites

• I'm using the latest version of Docusaurus.
• I have tried the npm run clear or yarn clear command.
• I have tried rm -rf node_modules yarn.lock package-lock.json and re-installing packages.
• I have tried creating a repro with https://new.docusaurus.io.
• I have read the console error message carefully (if applicable).

Description

Toggle word wrap and Copy buttons in code examples are almost invisible.

Reproducible demo

https://github.com/facebook/docusaurus/tree/main/website

Steps to reproduce

1. Open https://docusaurus.io/docs/typescript-support#setup
2. Change window size, so the code example doesn't fit on one line
3. Hover on code example

Expected behavior

Toggle word wrap and Copy buttons in code examples should have an opaque background.

Actual behavior

Toggle word wrap and Copy buttons in code examples have a semi-transparent background and merge with the text.

Your environment

• Public source code: https://github.com/facebook/docusaurus/tree/main/website
• Public site URL: https://docusaurus.io/
• Docusaurus version used: 3.7.0
• Environment name and version (e.g. Chrome 89, Node.js 16.4): Chrome 131
• Operating system and version (e.g. Ubuntu 20.04.2 LTS): macOS 15.2

Self-service

• I'd be willing to fix this bug myself.