Template:Tt/styles.css

.has-tt {
  display: inline;
}

.tt-wrapper {
  position: absolute;
  visibility: hidden;
}

.has-tt:hover .tt-wrapper {
  visibility: visible;
}

.tt {
 display: block;
 position: relative;
 width: max-content;
 max-width: 400px;
 padding: 6px 12px;
 color: #FFFFFF;
 background: #353535;
 text-align: center;
 border-radius: 8px;
}

.tt-after {
 content: '';
 position: absolute;
  bottom: 100%;
  left: 50%;
  margin-left: -8px;
  width: 0;
  height: 0;
  border-bottom: 8px solid #000000;
  border-right: 8px solid transparent;
  border-left: 8px solid transparent;
}