CSS: Tooltips

gistfile1.css

/* base CSS element */
.tip {
  background: #eee;
  border: 1px solid #ccc;
  padding: 10px;
  border-radius: 8px;
  box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2);
  position: relative;
  width: 200px;
}

/* arrows - :before and :after */
.tip:before {
  position: absolute;
  display: inline-block;
  border-top: 7px solid transparent;
  border-right: 7px solid #eee;
  border-bottom: 7px solid transparent;
  border-right-color: rgba(0, 0, 0, 0.2);
  left: -14px;
  top: 20px;
  content: '';
}

.tip:after {
  position: absolute;
  display: inline-block;
  border-top: 6px solid transparent;
  border-right: 6px solid #eee;
  border-bottom: 6px solid transparent;
  left: -12px;
  top: 21px;
  content: '';
}