body{font-family:sans-serif}table{border-collapse:collapse;width:50%;margin:20px auto}th,td{border:1px solid #ccc;padding:10px;text-align:center}input[type="text"]{width:100%;padding:5px;border:1px solid #ccc;border-radius:3px}button{padding:5px 10px;background-color:#4CAF50;color:#fff;border:none;border-radius:3px;cursor:pointer}