:root {
  min-height: 300%;
  font-size: 62.5%;
}
body { font-family:'Roboto'; background-image: linear-gradient(120deg, #fccb90 0%, #d57eeb 100%);}
nav {
  position: fixed;
  width: 100%;
  height: 5rem;
  line-height:5rem;
  background: #000000;
  text-align:center;
  color:#fff;
  top: 0;
  left: 0;
}
h1 {
  font: 4.8rem / 5.6rem Calibri;
  color: #000000;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
h1:before {
  content: "";
  display: block;
  width: 0;
  height: 0;
  border-width: 0 20px 20px 20px;
  border-style: solid;
  border-color: transparent transparent #000000 transparent;
  margin: 20px auto;
}
h1:after {
  content: "";
  display: block;
  width: 0;
  height: 0;
  border-width: 20px 20px 0 20px;
  border-style: solid;
  border-color: #000000 transparent transparent transparent;
  margin: 20px auto;
}