*{box-sizing:border-box}body{margin:0;font-family:system-ui,Segoe UI,Roboto,Arial}.container{max-width:900px;margin:0 auto;padding:16px}.btn{padding:8px 12px;border:1px solid #e5e7eb;border-radius:10px;background:#fff;cursor:pointer}.btn.primary{background:#0b69ff;color:#fff;border-color:#0b69ff}.table{width:100%;border-collapse:collapse;font-size:14px}.table th,.table td{border:1px solid #e5e7eb;padding:6px}