body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: #f5f5f5;
}

fieldset {
    max-width: 400px;
    padding: 17px;
    margin: 40px auto;
    border: 2px solid #ddd;
    background-color: #fff;
}

legend {
    font-weight: bold;
    text-align: center;
}

#fieldset1 {
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: center;
}

label {
    font-size: 14px;
}

#textbox {
    width: 100px;
    padding: 6px;
    font-size: 14px;
}

#button {
    width: 100px;
    padding: 8px;
    margin-top: 10px;
    cursor: pointer
}