Análisis de sentimiento en el navegador con Transformers.js – Prompt ejemplo

Create a single HTML file that uses Transformers.js (via CDN) to run a zero‑shot classification model (typeform/distilbert-base-uncased-mnli) entirely in the browser. The UI should have a text area for user input, and when the user clicks a button, it classifies the sentiment (positive, negative, neutral) and displays the result with a confidence bar and animated text. Use minimal CSS: a centered card, dark theme with neon accents. Add a subtle loading spinner while the model loads. The design should be mobile‑friendly. Output the full HTML.