* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  overflow: hidden;
  background: #111;
  font-family: Arial, sans-serif;
}

#scene {
  position: fixed;
  inset: 0;
  display: block;
}

.ui {
  position: absolute;
  top: 40px;
  left: 40px;
  color: white;
  z-index: 10;
  display: none;
}

.ui h1 {
  font-size: 32px;
  margin-bottom: 8px;
}

.ui p {
  opacity: 0.7;
}