body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.no {
  font-size: 40vw;
  line-height: 1;
}

footer {
  font-size: 10px;
  text-align: center;
  padding: 8px;
}