Hi there. If you often have to refer to the Unity documentation (https://docs.unity3d.com), I hope this simple style can help your eyes not to become dry because of the default white theme.
You can quickly install the theme (https://userstyles.org/styles/173896/unity-documentation-dark-theme) through the "Stylish" browser extension. Or you can use the style in the repository.
Please notify me if you find a bug or if something seems ugly to you. Thanks!
P.S. I am not a genius web programmer or even a beginner, so I apologize for not the most beautiful code (even if it's CSS).