body {
    background-color: #111;
    color: #fff;
    font-family: Arial, sans-serif;
    text-align: center;
}

input[type="text"] {
    padding: 10px;
    font-size: 16px;
}

input[type="submit"] {
    padding: 10px;
    font-size: 16px;
    background-color: #28a745;
    border: none;
    color: #fff;
}

h1 {
    margin-top: 50px;
}