body {
  background-position: center;
  background-size: auto;
  font-family: serif;
  background-color: white;
  max-width: 100%;
  text-align: center;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
}

header {
  text-align: center;
  margin: 1em;
  position: fixed;
  width: 100%;
  top: 0;
  margin: 0;
}

h3 {
  font-size: 20px;
  color: black;
  margin-top: 40px;
  margin-bottom: 15px;
}

a {
  color: black;
}

a:visited {
  color: black;
}


.container {
  font-family: serif;
  text-align: center;
  font-size: 20px;
}