body{font-family:Arial,sans-serif;margin:20px;background:#f5f6fa}h1{margin-bottom:10px}.card{max-width:360px;margin:80px auto;background:#fff;padding:20px;border-radius:8px}input,button{display:block;width:100%;padding:10px;margin-top:10px}table{width:100%;border-collapse:collapse;background:#fff}th,td{border:1px solid #ddd;padding:8px;font-size:14px}.tabs button{width:auto;display:inline-block;margin-right:8px}