body {
    font-family: Arial, sans-serif;
    text-align: center;
    background-color: #f4f4f4;
}

#game {
    background: white;
    padding: 20px;
    margin: 50px auto;
    width: 300px;
    box-shadow: 2px 2px 10px rgba(0,0,0,0.1);
}

input, button {
    margin-top: 10px;
}