.pulse {
  /*position: absolute;*/
  left: 50%;
  margin-left: -36px;
  width: 72px;
  height: 72px;
  line-height: 72px;
  font-family: sans-serif;
  font-weight: 700;
  font-size: 34px;
  text-align: center;
  color: #0cffff;
}

.pulse span,
.pulse:before,
.pulse:after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border: 0 solid #0cffff;
  border-radius: 100%;
  -webkit-animation: da-pulse 1.5s ease-in-out 0s infinite;
          animation: da-pulse 1.5s ease-in-out 0s infinite;
}

.pulse span {
  border-color: #0cffff;
  border-width: 4px;
  top: 6px;
  left: 6px;
  right: 6px;
  bottom: 6px;
}

/*
.pulse:before {
  border-color: #1f7b9a;
  border-width: 2px;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
}
*/
.pulse:after {
  border-color: #0cffff;
  border-width: 1px;
  top: -5px;
  left: -5px;
  right: -5px;
  bottom: -5px;
}

@-webkit-keyframes da-pulse {
  0%,
  100% {
    -webkit-transform: scale(1.25);
            transform: scale(1.25);
    opacity: 0;
  }
  48%,
  52% {
    -webkit-transform: scale(1);
            transform: scale(1);
    opacity: 1;
  }
}

@keyframes da-pulse {
  0%,
  100% {
    -webkit-transform: scale(1.25);
            transform: scale(1.25);
    opacity: 0;
  }
  48%,
  52% {
    -webkit-transform: scale(1);
            transform: scale(1);
    opacity: 1;
  }
}