body {
  margin: 0;
  background-image: url(Pawprints.jpg);
  background-size: 100%;
  background-repeat: repeat;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
body h1 {
  font-weight: 900;
  color: white;
}
.maincontent {
  display: flex;
  justify-content: center;
  align-items: center;
  flex: 1;
  margin-bottom: 10em;
}
header a {
  font-weight: 550;
  background-color: white;
  padding: 0.2em;
}