a.tooltiplink {
    position: relative;
}

    a.tooltiplink:hover::after {
        content: attr(data-title);
        background-color: #dee0df;
        color: #000;
        padding: 10px;
        border-radius: 4px;
        font-size: 12px;
        line-height: 14px;
        display: block;
        position: absolute;
        top: 100%;
        left: 50%;
        transform: translateX(-50%);
        white-space: nowrap;
        z-index: 1;
        box-shadow: rgba(0, 0, 0, 0.3) 0 2px 10px;
    }