Viewing github.com/facebook/react/packages/react-devtools-shared/src/devtools/views/Profiler/Tooltip.css

```
.Tooltip {
```
```
  position: absolute;
```
```
  pointer-events: none;
```
```
  border: none;
```
```
  border-radius: 0.25rem;
```
```
  padding: 0.25rem 0.5rem;
```

  font-family: var(--font-family-sans);

```
  font-size: 12px;
```

  background-color: var(--color-tooltip-background);

```
  color: var(--color-tooltip-text);
```
```
  opacity: 1;
```
```
  white-space: nowrap;
```

  /* Make sure this is above the DevTools, which are above the Overlay */

```
  z-index: 10000002;
```
```
}
```
```
.Tooltip.hidden {
```
```
  opacity: 0;
```
```
}
```
```
.Container {
```
```
  width: -moz-max-content;
```
```
  width: -webkit-max-content;
```
```
}
```

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