body {
    font-family: Arial, sans-serif;
    text-align: center;
    margin: 0;
    padding: 0;
    background-color: #f4f4f9;
}

h1 {
    color: #333;
}

.game-container {
    margin: 50px auto;
    padding: 20px;
    max-width: 400px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

input[type="number"] {
    padding: 10px;
    width: 80%;
    margin: 10px 0;
    border: 1px solid #ccc;
    border-radius: 4px;
}

button {
    padding: 10px 20px;
    background-color: #007BFF;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

button:hover {
    background-color: #0056b3;
}

.message {
    margin-top: 20px;
    font-size: 1.2em;
}