Module:Mbox/styles.css

.mbox {
    position: relative;
    display: flex;
    flex-direction: column;
    margin-top: 0.5rem;
    margin-bottom: 1rem;
    background-color: var( --color-surface-2 );
    border-radius: 8px;
    color: var( --color-base--subtle );
    font-size: 0.875rem;
    line-height: 1.25rem;
}

.mbox.mbox-high {
    /* FIXME: Update back to Citzen CSS var when patched */
    background-color: rgba( 221, 51, 51, 0.1 );
}

.mbox.mbox-med {
    /* FIXME: Update back to Citzen CSS var when patched */
    background-color: rgba( 255, 204, 51, 0.1 );
}

.mbox-title {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
}

.mbox-icon img {
    display: block;
    width: 0.875rem;
    height: auto;
    margin-right: 0.5rem;
    opacity: 0.6;
    filter: invert(100%);
}

.mbox-text {
    position: absolute;
    top: 100%;
    z-index: 10;
    padding: 1rem;
    width: 100%;
    box-sizing: border-box;
    background-color: var( --color-surface-1 );
    border-bottom-left-radius: 8px;
    border-bottom-right-radius: 8px;
    box-shadow: 2.2px 5.3px 10px 10px rgba(46, 49, 56, .05);
    opacity: 0;
    visibility: hidden;
}

.mbox:hover {
    /* Merge with popup */
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
    box-shadow: 2.2px 5.3px 10px 10px rgba(46, 49, 56, .05);
}

.mbox:hover .mbox-text {
    opacity: 1;
    visibility: visible;
}