* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  }
html, body {
  font-size: 62.5%;
  height: 100%;
  width: 100%;
  }
body {
  background-color: #000000;
  color: #ffffff;
  font-size: 1.3rem;
  font-family: "Courier New", Courier, monospace;
}

.center {
  width: 100%;
  text-align: center;
}
.fullwidth {
  width: 100%;
}
a {
  color: #ffffff;
  font-size: 3rem;
  text-decoration: none;
  background-color: #0000ff;
}