.pcl-locker-wrapper {
    border: 2px dashed #ccc;
    padding: 20px;
    background: #f9f9f9;
}

#pcl-puzzle-board {
    display: grid;
    grid-template-columns: repeat(3, 80px);
    grid-gap: 5px;
    justify-content: center;
    margin: 20px 0;
}

.pcl-tile {
    width: 80px;
    height: 80px;
    background: #0073aa;
    color: white;
    font-size: 24px;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border-radius: 4px;
}

.pcl-empty {
    background: #ddd;
    cursor: default;
}