Viewing github.com/facebook/react/packages/react-devtools-timeline/src/EventTooltip.css

```
.Tooltip {
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  position: fixed;
```
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}
```
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.TooltipSection,
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.TooltipWarningSection,
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.SingleLineTextSection {
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  display: block;
```
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  border-radius: 0.125rem;
```
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  padding: 0.25rem;
```
```
  user-select: none;
```
```
  pointer-events: none;
```

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

  box-shadow: 1px 1px 2px var(--color-shadow);

```
  color: var(--color-tooltip-text);
```
```
  font-size: 11px;
```
```
}
```
```
.TooltipWarningSection {
```
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  margin-top: 0.25rem;
```

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

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}
```
```
.TooltipSection,
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.TooltipWarningSection {
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  max-width: 300px;
```
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}
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```
.SingleLineTextSection {
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  white-space: nowrap;
```
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}
```
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.Divider {
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  height: 1px;
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  background-color: #aaa;
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  margin: 0.25rem 0;
```
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}
```
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.DetailsGrid {
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  display: grid;
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  padding-top: 5px;
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  grid-gap: 2px 5px;
```

  grid-template-columns: min-content auto;

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}
```
```
.DetailsGridLabel {
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  color: var(--color-dim);
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  text-align: right;
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  white-space: nowrap;
```
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}
```
```
.DetailsGridLongValue {
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  word-break: break-all;
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  max-height: 50vh;
```
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  overflow: hidden;
```
```
}
```
```
.FlamechartStackFrameName {
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  word-break: break-word;
```
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}
```
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.ComponentName {
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  font-weight: bold;
```
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  word-break: break-word;
```
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  margin-right: 0.25rem;
```
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}
```
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.ReactMeasureLabel {
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}
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.UserTimingLabel {
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  word-break: break-word;
```
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}
```
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.NativeEventName {
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  font-weight: bold;
```
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  word-break: break-word;
```
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  margin-right: 0.25rem;
```
```
}
```
```
.WarningText {
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  color: var(--color-warning-text-color);

```
}
```
```
.Image {
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  border: 1px solid var(--color-border);

```
}
```
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.DimText {
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```
  color: var(--color-dim);
```
```
}
```

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