#prioritize {
    border: 2px solid black;
    padding: 10px;
    position: relative;
}

#prioritize .prioritize-item {
    border: 2px solid #888;
    border-radius: 3px;
    cursor: pointer;
    margin: 5px 0;
    padding: 10px;
    overflow: hidden;
}

#prioritize [draggable] {
    -moz-user-select: none;
    -webkit-user-select: none;
    user-select: none;
    /* Required to make elements draggable in old webkit */
    -webkit-user-drag: element;
    -webkit-touch-callout: none;
    position: relative;
}

#prioritize .cloned-item {
    border-color: #0bf;
    animation: show-border .4s;
}

@keyframes show-border {
    0% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}

#prioritize .cloned-item::before {
    content: "+";
    color: #0bf;
    font-size: 2em;
    font-weight: 900;
    line-height: 1;
    position: absolute;
    left: 50%; top: 50%;
    transform: translate3d(-50%, -50%, 0);
}

#prioritize .drag-item:not(.cloned-item) {
    visibility: hidden;
    position: absolute;
    left: -100%;
    top: -100%;
}


/*
.playlists .item {
    border: 4px dashed transparent;
    min-width: 100px;
    height: 100%;
    overflow: hidden;
}

*/