html, body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  background-color: black;
}

body {
  overflow: hidden;
  background: black;
}

main {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}