.custom-tooltip-container {
    position: relative;
}

.custom-tooltip {
    visibility: hidden;
    background-color: #555;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 5px 10px;
    position: absolute;
    z-index: 1;
    bottom: 116%;
    opacity: 0;
    transition: opacity 0.3s;
    white-space: nowrap;
}

    .custom-tooltip::after {
        content: "";
        position: absolute;
        top: 100%;
        left: 0;
        margin-left: 4px;
        border-width: 5px;
        border-style: solid;
        border-color: #555 transparent transparent transparent;
    }

.custom-tooltip-container:hover .custom-tooltip {
    visibility: visible;
    opacity: 1;
}