body {
  margin: 0;
  background: black;
}
#canvas {
  width: 100%;
  height: 100%;
  display: block;
  position: fixed;
  left: 0;
  top: 0;
  z-index: 2;
}
.content {
  height: 100vh;
  font-size: 4.5vw;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: white;
}