Predefinição:Itemdata/styles.css

.item-wrapper {
    position: relative;
    display: inline-block;
    margin: 0 4px;
    overflow: visible;
    z-index: 5;
}

.item-wrapper img {
    vertical-align: bottom;
}

.item-wrapper[data-tooltip]:hover::after {
    content: attr(data-tooltip);
    position: fixed; /* <-- em vez de absolute */
    left: 50vw;
    top: 20px;
    transform: translateX(-50%);
    background: #2c2c2c;
    color: #fff;
    padding: 2px 5px;
    font-size: 13px;
    font-weight: bold;
    border-radius: 4px;
    white-space: nowrap;
    z-index: 9999;
}

.item-wrapper[data-tooltip]:hover::before {
    content: "";
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    border-width: 8px 8px 0 8px;
    border-style: solid;
    border-color: #2c2c2c transparent transparent transparent;
    z-index: 9998;
}

.item-count {
    position: absolute;
    bottom: -4px;
    right: -4px;
    font-size: 10px;
    font-weight: bold;
    background: rgba(0, 0, 0, 0.75);
    color: white;
    padding: 1px 4px;
    border-radius: 4px;
    line-height: 1;
    box-shadow: 0 0 1px #000;
    white-space: nowrap;
    z-index: 2;
}

.item-wrapper:hover .item-count {
    background: rgba(0, 0, 0, 0.9);
}