Module:Mbox/styles.css

.mbox {
	position: relative;
	display: flex;
	flex-direction: column;
	margin-block: var(--space-md);
	background-color: var(--color-surface-1);
	border: var(--border-base);
	border-radius: var(--border-radius-medium);
	font-size: var(--font-size-small);
	line-height: var(--line-height-xx-small);
}

.mbox.mbox-high {
	background-color: var(--background-color-destructive-subtle);
}

.mbox.mbox-med {
	background-color: var(--background-color-warning-subtle);
}

.mbox-title,
.mbox-text {
	padding: var(--space-sm) var(--space-md);
}

.mbox-title {
	display: flex;
	align-items: center;
}

.mbox-icon img {
	display: block;
	width: var(--font-size-small);
	height: auto;
	margin-right: var(--space-xs);
	opacity: var(--opacity-icon-base);
	filter: var(--filter-invert);
}

.mbox-text {
	position: absolute;
	top: 100%;
	left: 0;
	right: 0;
	z-index: 10;
	margin-inline: -1px;
	box-sizing: border-box;
	background-color: var(--color-surface-1);
	border-inline: var(--border-base);
	border-bottom: var(--border-base);
	border-bottom-left-radius: var(--border-radius-medium);
	border-bottom-right-radius: var(--border-radius-medium);
	box-shadow: var(--box-shadow-drop-xx-large);
	opacity: 0;
	visibility: hidden;
}

.mbox-text::before {
	content: '';
	display: block;
	position: absolute;
	top: 0;
	left: var(--space-md);
	right: var(--space-md);
	height: var(--border-width-base);
	background: var(--border-color-subtle);
}

.mbox:hover {
	/* Merge with popup */
	border-bottom-left-radius: 0;
	border-bottom-right-radius: 0;
	box-shadow: var(--box-shadow-drop-xx-large);
}

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