Minimal, elegant vocabulary audiobook app built with Next.js 13.5 (JavaScript), Tailwind CSS, and shadcn-style UI.

• Word groups (sets) loaded from data/words.json
• Continuous TTS playback (word → synonym → sentence) with 1–2s pauses
• Controls: Play / Pause / Stop / Next / Prev
• Progress: “Word X of Y” with progress bar
• Adjustable speech rate: slow / medium / fast
• Light/Dark theme toggle (persisted)

npm install
npm run dev

Open http://localhost:3000

Edit data/words.json to manage sets. Structure:

{
  "groups": [
    {
      "id": 1,
      "name": "Set 1",
      "words": [
        {
          "id": 1,
          "word": "abreast",
          "synonym": "up-to-date",
          "sentence": "..."
        }
      ]
    }
  ]
}

Choose the active set from the dropdown in the UI.

• Click Play to start; Pause/Resume or Stop anytime
• Next/Prev jumps between words
• Change rate via the rate dropdown
• Toggle theme with the header button

• TTS uses the browser SpeechSynthesis API (separate utterances per field)
• Playback is resilient to fast skips via a session run id
• Styling via Tailwind; UI primitives: Button, Card, Progress

1. Push to a Git repo
2. Import the repo in Vercel
3. Use defaults for a Next.js app

Requires SpeechSynthesis (modern Chrome/Edge/Safari/Firefox). Some browsers require a user gesture before audio can play.