Viewing github.com/facebook/react/packages/react-devtools-extensions/popups/shared.css

```
html, body {
```
```
  font-size: 14px;
```
```
}
```
```
body {
```
```
  margin: 8px;
```
```
}
```
```
@media (prefers-color-scheme: dark) {
```
```
  :root {
```
```
    color-scheme: dark;
```
```
  }
```
```
  @supports (-moz-appearance:none) {
```
```
    :root {
```
```
      background: black;
```
```
    }
```
```
    body {
```
```
      color: white;
```
```
    }
```
```
  }
```
```
}
```