:root{color-scheme:light;font-family:Arial,sans-serif}*{box-sizing:border-box}body{margin:0;background:#f5f6f8;color:#1f2937}.app{max-width:980px;margin:0 auto;padding:16px}h1,h2,h3,h4{margin:0 0 8px}.subtitle{margin:0 0 16px;color:#4b5563}.panel{background:#fff;border:1px solid #d1d5db;border-radius:6px;padding:12px;margin-bottom:12px}.form-stack{display:grid;gap:10px}label{display:grid;gap:6px;font-size:14px}input,textarea,button{font:inherit}input,textarea{width:100%;border:1px solid #9ca3af;border-radius:4px;padding:8px;background:#fff}textarea{resize:vertical}button{border:1px solid #374151;background:#111827;color:#fff;border-radius:4px;padding:8px 10px;cursor:pointer}button:disabled{opacity:.6;cursor:not-allowed}.row{display:flex;gap:8px;flex-wrap:wrap}.meta-grid{display:grid;gap:6px;margin-top:10px;font-size:14px}.toggle-row{display:flex;align-items:center;gap:8px}.toggle-row input{width:auto}.error-box{border:1px solid #fca5a5;background:#fef2f2;color:#991b1b;border-radius:4px;padding:8px;margin-bottom:8px;display:grid;gap:4px}.json-block{margin:0;background:#0b1020;color:#d1fae5;padding:10px;border-radius:4px;overflow:auto;font-size:12px;line-height:1.4}