Dari naskah {{naskah}}

Buat storyboard JSON strict, total durasi 30 detik. Output JSON strict tanpa teks lain:
{
  "scenes": [
    {"id": 1, "duration": 10, "voice_over": "...", "visual_prompt": "... english, descriptive for stock video search", "transition": "cut", "caption": "..."},
    {"id": 2, "duration": 10, "voice_over": "...", "visual_prompt": "...", "transition": "cut", "caption": "..."},
    {"id": 3, "duration": 10, "voice_over": "...", "visual_prompt": "...", "transition": "cut", "caption": "..."}
  ]
}
Aturan: sum duration = 30. voice_over, visual_prompt, caption wajib isi. visual_prompt dalam bahasa Inggris.