.popover {
position: absolute;
color: white;
background-color: black;
border-radius: 4px;
line-height: 16px;
top: 0px;
min-width: 200px;
text-align: center;
font-family: Arial, Helvetica, sans-serif;
font-size: 12px;
padding: 4px 10px;
}
.popover::after {
content: '\25BC';
color: black;
position: absolute;
bottom: -11px;
left: 4px;
}