How to fix LaTeX inputs wrapping in Sanity’s Portable Text editor

I was having an issue with Sanity’s official LaTeX plugin where inline equations were being wrapped at a certain width, and were therefore overlapping back on themselves:

I found that this was due to some CSS that’s bundled inside Sanity Studio.

To fix this, I created a custom CSS file that I named custom.css, and put this CSS into that file to override the problematic styles:

*[data-ui="Card"] > span > span {
  max-width: none;
}

Then, to tell Sanity Studio to include that CSS custom.css file, I referenced it in my sanity.json file:

{
  ...
  "parts": [
    ...
    {
      "implements": "part:@sanity/base/theme/variables/override-style",
      "path": "custom.css"
    }
  ]
}

Now, with that custom CSS fixing the issue, the LaTeX inline inputs are the correct width!