body {
    font-family: Arial, sans-serif;
    text-align: center;
}

#puzzle-area {
    display: grid;
    grid-template-columns: repeat(4, 100px); /* Updated for 4x4 grid */
    grid-gap: 5px;
    margin: 20px auto;
}

.puzzle-piece {
    width: 100px;
    height: 100px;
    background-color: #4CAF50;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
    cursor: pointer;
}

form {
    margin-top: 20px;
}

form input, form textarea {
    width: 300px;
    margin: 5px 0;
    padding: 10px;
}

form button {
    padding: 10px 15px;
    background-color: #4CAF50;
    color: white;
    border: none;
    cursor: pointer;
}

form button:hover {
    background-color: #45a049;
}