* {
  margin: 0;
  padding: 0;
}

body {
  background-color: black;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  position: absolute;
  width: 100%;
  height: 100%;

}

#rule {
  font-size: 10pt;
  font-family: 'Courier New', Courier, monospace;
  padding: 8pt;
  position: absolute;
  bottom: 0;
}