body {
  margin: 0;
  font-family: "Montserrat", sans-serif;
  background: radial-gradient(circle at center, #0b0c1e 0%, #000010 100%);
  overflow: hidden;
  color: white;
}

header {
  margin-top: 3em;
  text-align: center;
  color: white;
}

#container3D canvas {
  width: 100vw !important;
  height: 100vh !important;
  position: absolute;
  top: 0;
  left: 0;
}