@import url(https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;700&family=Noto+Sans+TC:wght@400;700&family=Roboto:wght@400;700&display=swap);
* {
  margin: 0;
  padding: 0;
}

html,
body {
  height: 100%;
  overflow: hidden
}

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