body {
  margin: 0;
  margin-top: 10;
  overflow: hidden;
  text-align: center;
}

iframe {
  width: 100vw;
  height: 94vh;
}

@media (max-width:768px) {
  iframe {
    height: 85vh;
  }
}

a {
  font-size: 3vh;
  font-weight: bold;
}