// Latest Firefox and Safari support this. 
// Chrome requires experimental flag
// chrome://flags/#enable-experimental-web-platform-features

.mask-overlay {
  display: block;
  background-color: white;
  mix-blend-mode: screen;
  h1 {
    box-sizing: border-box;
    margin: 0;
    padding: 3rem;
    color: black;
    font-size: 16vw;
    font-weight: bold;
    line-height: 1;
    text-transform: uppercase;
    animation: colormorph 20s infinite;
  }
}


html {
  height: 100%;
  background-attachment: fixed;
  background-blend-mode: exclusion;
  background-color: #bada55;
  background-image: url("//s3-us-west-2.amazonaws.com/s.cdpn.io/66630/Aurora2.jpg");
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  font-family: Raleway, Arial Black, sans-serif;
}


@keyframes colormorph {
  50% {
    color: red;
  }
  100% {
    color: black;
  }
}