* {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  font-family: sans-serif;
  background: #eee;
  color: black;
  overflow: hidden;
}

#root {
  /* 画面サイズにフィット */
  transform-origin: 0 0;
  scale: tan(atan2(100dvw, 720px))
}

.demo-container {
  background-color: white;
  position: relative;
  width: 720px;
  height: 405px;
  overflow: hidden;

  p {
    position: absolute;
    left: 0;
    top: 360px;
    width: 100%;
    height: auto;
    text-align: center;
    font-size: 1.5rem;
  }
}

.dot {
  position: absolute;
  top: 50%;
  left: 50%;
  height: auto;

  &::before {
    display: block;
    content: "";
    position: absolute;
    width: 250px;
    height: 250px;
    border: solid 3px black;
    border-radius: 50%;
    translate: -50% -50%;
  }
}