Robin Malfait 3aa0e494bf
Do not emit @keyframes in @theme reference (#16120)
This PR fixes na issue where `@keyframes` were emitted if they wre in a
`@theme
reference` and anothe `@theme {}` (that is not a reference) was present.

E.g.:

```css
@reference "tailwindcss";

@theme {
  /* ... */
}
```

Produces:
```css
:root, :host {
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}
@keyframes ping {
  75%, 100% {
    transform: scale(2);
    opacity: 0;
  }
}
@keyframes pulse {
  50% {
    opacity: 0.5;
  }
}
@keyframes bounce {
  0%, 100% {
    transform: translateY(-25%);
    animation-timing-function: cubic-bezier(0.8, 0, 1, 1);
  }
  50% {
    transform: none;
    animation-timing-function: cubic-bezier(0, 0, 0.2, 1);
  }
}
```

With this PR, the produced CSS looks like this instead:
```css
:root, :host {
}
```

Note: the empty `:root, :host` will be solved in a subsequent PR.

### Test plan

Added some unit tests, and a dedicated integration test.
2025-01-31 15:13:17 +01:00
2025-01-28 11:31:54 -05:00
2025-01-29 14:14:35 -05:00
2025-01-29 14:14:35 -05:00
2024-03-05 14:29:15 +01:00
2024-03-05 14:29:15 +01:00

Tailwind CSS

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A utility-first CSS framework for rapid UI development.
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