/* 简单的样式 */
body {
    font-family: sans-serif;
    text-align: center;
    padding: 20px;
}

#login-page, #protected-page {
    margin-bottom: 20px;
}

input[type="password"] {
    padding: 8px;
    margin-bottom: 10px;
}

button {
    padding: 10px 20px;
    cursor: pointer;
}