body {
    background-color: #f0f8ff;
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.game-container {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    padding: 20px;
    text-align: center;
    width: 300px;
}

h1 {
    font-size: 24px;
    margin-bottom: 10px;
}

input {
    padding: 10px;
    width: calc(100% - 22px);
    margin-top: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

button {
    background-color: #28a745;
    color: white;
    padding: 10px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    margin-top: 10px;
    width: 100%;
}

button:hover {
    background-color: #218838;
}

.message {
    margin-top: 15px;
    font-size: 14px;
    color: #555;
}

.puzzle-container {
    margin-top: 20px;
}

.result {
    margin-top: 20px;
    font-size: 18px;
    font-weight: bold;
}