tooltip.css

.matter-tooltip,
.matter-tooltip-top {
    z-index: 10;
    position: absolute;
    left: 0;
    right: 0;
    font-family: var(--matter-font-family, "Roboto", "Segoe UI", BlinkMacSystemFont, system-ui, -apple-system);
    font-size: 10px;
    font-weight: 400;
    line-height: 16px;
    white-space: nowrap;
    text-transform: none;
    text-align: center;
    pointer-events: none;
}

.matter-tooltip {
    bottom: -40px;
}

.matter-tooltip-top {
    top: -40px;
}

.matter-tooltip > span,
.matter-tooltip-top > span {
    position: -webkit-sticky;
    position: sticky;
    left: 0;
    right: 0;
    display: inline-block;
    box-sizing: content-box;
    margin: 0 -100vw;
    border: solid 8px transparent;
    border-radius: 12px;
    padding: 4px 8px;
    color: rgb(var(--matter-surface-rgb, 255, 255, 255));
    background-clip: padding-box;
    background-image: linear-gradient(rgba(var(--matter-surface-rgb, 255, 255, 255), 0.34), rgba(var(--matter-surface-rgb, 255, 255, 255), 0.34));
    background-color: rgba(var(--matter-onsurface-rgb, 0, 0, 0), 0.85);
    transform: scale(0);
    opacity: 0;
    pointer-events: auto;
    transition: transform 0.075s, opacity 0.075s;
}

:not(html):hover > .matter-tooltip > span,
.matter-tooltip:hover > span,
:not(html):hover > .matter-tooltip-top > span,
.matter-tooltip-top:hover > span {
    transform: scale(1);
    opacity: 1;
    transition: transform 0.15s, opacity 0.15s;
}

:focus-within > .matter-tooltip > span,
:focus-within > .matter-tooltip-top > span {
    transform: scale(1);
    opacity: 1;
    transition: transform 0.15s, opacity 0.15s;
}

/* Non-desktop */
@media (pointer: coarse), (hover: none) {

    .matter-tooltip,
    .matter-tooltip-top {
        font-size: 14px;
        line-height: 20px;
    }

    .matter-tooltip {
        bottom: -48px;
    }
    .matter-tooltip-top {
        top: -48px;
    }

    .matter-tooltip > span,
    .matter-tooltip-top > span {
        padding: 6px 16px;
    }
}