twTooltip.css

.tw-wrap {
  display: inline-block;
  position: relative;
}
.tw-tooltip {
  width: 100px;
  height: auto;
  -webkit-border-radius: 5px;
  -moz-border-radius: 5px;
  border-radius: 5px;
  position: absolute;
  background: rgba(0,0,0,0.5);
  padding: 5px;
  left: 0;
  top: 0;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  display: none;
  color: #000;
  z-index: 99999;
}
.tw-right-direction:before {
  content: "";
  width: 0;
  height: 0;
  border: 5px solid transparent;
  border-left-width: 0;
  border-right: 5px solid rgba(0,0,0,0.5);
  position: absolute;
  left: -5px;
  top: 50%;
  margin-top: -5px;
  display: block;
}
.tw-left-direction:before {
  content: "";
  width: 0;
  height: 0;
  border: 5px solid transparent;
  border-right-width: 0;
  border-left: 5px solid rgba(0,0,0,0.5);
  position: absolute;
  right: -5px;
  top: 50%;
  margin-top: -5px;
  display: block;
}
.tw-top-direction:before {
  content: "";
  width: 0;
  height: 0;
  border: 5px solid transparent;
  border-bottom-width: 0;
  border-top: 5px solid rgba(0,0,0,0.5);
  position: absolute;
  bottom: -5px;
  left: 50%;
  margin-left: -5px;
  display: block;
}
.tw-bottom-direction:before {
  content: "";
  width: 0;
  height: 0;
  border: 5px solid transparent;
  border-top-width: 0;
  border-bottom: 5px solid rgba(0,0,0,0.5);
  position: absolute;
  top: -5px;
  left: 50%;
  margin-left: -5px;
  display: block;
}