* {
  font-family: Verdana, Geneva, Tahoma, sans-serif;
}

html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
}

h1 {
  text-align: center;
  font-size: 5em;
  margin: 0;
}

#container > * {
  display: block;
}

#container {
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}