.cam-show-box {
  position: fixed;
  left: 50%;
  top: 54%;
  transform: translate(-49%, -49%);
  background: white;
  border: 1px solid black;
  font-family: Verdana, Arial, Helvetica, sans-serif;
  padding: 5px;
  z-index: 999;
}

.cam-show-box .arrow {
  border-style: solid;
  position: absolute;
  left: 49%;
  transform: translate(-51%, 0);
  border-color: transparent transparent black transparent;
  border-width: 0px 8px 8px 8px;
  top: -8px;
}

.cam-show-box .arrow:after {
  border-color: transparent transparent white transparent;
  border-style: solid;
  border-width: 0px 7px 7px 7px;
  top: 1px;
  content: "";
  position: absolute;
  left: -7px;
}