body {
    font-family: Arial, sans-serif;
    padding: 20px;
}
.container {
    max-width: 600px;
    margin: 50px auto 0;
}
.message {
    padding: 10px;
    border: 1px solid #ccc;
    background-color: #f9f9f9;
    margin-bottom: 20px;
}
input[type="text"] {
    width: 100%;
    padding: 8px;
    margin-bottom: 10px;
}
input[type="submit"] {
    padding: 10px 20px;
}