body {
  /* Background image. */
  background-image: url(index_background.jpeg);
  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
  overflow: hidden;

  font-family: sans-serif;
  background-color: darkblue;
  color: white;
  font-weight: bold;
  margin: 0;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

a {
  color: white;
  text-decoration: none;
}

a:hover {
  color: deepskyblue;
}