:root{font-family:Inter,Segoe UI,Arial,sans-serif;color:#0f172a;background:#f8fafc}*{box-sizing:border-box}body{margin:0}.app{padding:12px}h1{margin:0 0 8px;font-size:18px}.card{background:#fff;border:1px solid #e2e8f0;border-radius:8px;padding:10px;margin-bottom:10px}label{display:block;font-size:12px;margin-bottom:4px;color:#334155}input{width:100%;padding:8px;margin-bottom:8px;border:1px solid #cbd5e1;border-radius:6px;font-size:13px}.row{display:flex;gap:8px}button{border:0;border-radius:6px;padding:8px 10px;cursor:pointer;background:#0f172a;color:#fff;font-size:12px}button:disabled{opacity:.5;cursor:not-allowed}.hint{margin:4px 0 0;font-size:12px;color:#475569}.status{font-size:12px;padding:8px;border-radius:6px;background:#e2e8f0}