.aecn-tooltip {
    position: absolute;
    left: 50%;
    bottom: calc(100% + 10px);
    transform: translateX(-50%) translateY(4px);
    background: #111;
    color: #fff;
    padding: 6px 10px;
    border-radius: 6px;
    font-size: 12px;
    line-height: 1.2;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    z-index: 9999;
    transition: opacity 0.18s ease, transform 0.18s ease;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.18);
}

.aecn-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border-width: 6px 6px 0 6px;
    border-style: solid;
    border-color: #111 transparent transparent transparent;
}

.aecn-tooltip.is-visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}