.draggable-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    width: 500px;
    margin-top: 40px;
    height: auto;
    padding: 10px;
    border-radius: 4px;
}
.circle-item {
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    word-break: break-word;
    padding: 2px;
    line-height: 1.1;
    font-size: 14px;
    width: 50px;
    height: 50px;
    aspect-ratio: 1 / 1;
    background-color: rgba(46, 109, 164, 0.5);
    color: black;
    border-radius: 50%;
    cursor: pointer;
    z-index: 10;
    touch-action: none;
    text-shadow: 0 0 2px white, 0 0 2px white;
    font-weight: bold;
    overflow: hidden;
}
// ...remaining CSS from bkpk_sample.php...