: relative;
}

.call::before {
  content: '';
  background-color: #111111e3;
  -webkit-filter: blur(5px);
  filter: blur(5px);
  inset: 0;
  position: absolute;
  z-index: -1;
  text-align: center;
}

.phone-number::after {
  content: "1234";
  background: -webkit-gradient(linear, left top, right top, color-stop(20%, rgb(206, 206, 206)), color-stop(40%, rgb(255, 255, 255)), color-stop(60%, rgb(255, 255, 255)), color-stop(80%, rgb(206, 206, 206)));
  background: linear-gradient(to right, rgb(206, 206, 206) 2