html, body {
  background: linear-gradient(to bottom, #000428, #004e92);
}

p {
  color: white;
  text-align: center;
}

h1 {
  background: url();
  -webkit-background-clip: text;
  background-size: contain;
  width: 100%;
  text-align: center;
  color: transparent;
  font-weight: 900;
}
h1::before {
  content: attr(data-heading);
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  background: linear-gradient(45deg, rgba(255, 255, 255, 0) 45%, rgba(255, 255, 255, 0.8) 50%, rgba(255, 255, 255, 0) 55%, rgba(255, 255, 255, 0) 100%);
  -webkit-background-clip: text;
  color: transparent;
  mix-blend-mode: screen;
  -webkit-animation: shine 1s infinite;
          animation: shine 1s infinite;
  background-size: 200%;
  text-shadow: 2px 2px 10px rgba(0, 0, 0, 0.2), -2px 2px 10px rgba(0, 0, 0, 0.2), -2px -2px 10px rgba(0, 0, 0, 0.2);
}

@-webkit-keyframes shine {
  0% {
    background-position: -100%;
  }
  100% {
    background-position: 100%;
  }
}

@keyframes shine {
  0% {
    background-position: -100%;
  }
  100% {
    background-position: 100%;
  }
}
/* Not needed for demo */
@font-face {
  font-family: "frozen";
  src: url("");
}
html, body {
  height: 100%;
}

h1 {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  position: absolute;
  margin: 0;
  font-family: "frozen", serif;
  font-weight: 700;
}