html,
body {
  margin: 0;
  background: #000;
  height: 100vh;
  overflow: hidden;
}

body:before,
body:after {
  content: '';
  position: absolute;
  z-index: 1;
  top: 50%;
  left: 50%;
  width: 100vw;
  height: 100vh;
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
  -webkit-transform-origin: 0 0;
          transform-origin: 0 0;
  mix-blend-mode: hard-light;
  background: linear-gradient(45deg, #e10000, #40ab00);
}

body:after {
  z-index: 2;
  content: 'WE ARE COMING SOON';
  font-family: 'Montserrat', sans-serif;
  mix-blend-mode: soft-light;
  background: #3399ff;
  color: #ffffff;
  font-size: 50px;
  text-align: center;
  letter-spacing: 2vw;
  top: 50%;
  left: calc(50% + 5vw);
  -webkit-transform: translateX(-50%);
          transform: translateX(-50%);
  height: auto;
}
@media (max-width: 575px) {
  body:after {
    font-size: 12px;
  }
}