.txt {
  position: relative;
  display: inline-block;
  border-bottom: 1px dotted black;
}

.txt .ttp {
  visibility: hidden;
  width: 150px;
  background-color: transparent;
  box-shadow: 1px 1px 20px #cacaca;
  border: 2px solid #009933;
  color: #000000;
  text-align: left;
  border-radius: 6px;
  padding: 7px 7px;
  position: absolute;
  z-index: 1;
  top: 150%;
  left: 10%;
  margin-left: -10px;
}

.txt .ttp::before {
  content: "";
  position: relative;
  position: absolute;
  bottom: 100%;
  left: 20%;
  margin-left: -10px;
  border-width: 10px;
  border-style: solid;
  border-color: transparent transparent #009933 transparent;
}

.txt .ttp::after {
  content: "";
  position: relative;
  position: absolute;
  bottom: 100%;
  left: 20%;
  margin-left: -8px;
  border-width: 8px;
  border-style: solid;
  border-color: transparent transparent #ffffff transparent;
}

.txt:hover .ttp {
  visibility: visible;
  opacity: 1;
}