body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #f0f0f0;
}

.container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

#drop-zone {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(3, 1fr);
    gap: 5px;
    margin-bottom: 20px;
}

.drop-target {
    width: 200px;
    height: 200px;
    border: 2px dashed #333;
    position: relative;
}

.drop-target img {
    position: absolute;
    width: 100%;
    height: 100%;
}

#puzzle-container {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}

#puzzle-container img {
    width: 100px;
    height: 100px;
    border: 2px solid #333;
    cursor: grab;
}

.hidden {
    display: none;
}

#message {
    text-align: center;
    margin-top: 20px;
}