body {
  color: white;
  margin: 0;
  background-color: black;
}

canvas {
  z-index: -1;
  top: 0;
  display: block;
  width: 100%;
  height: 100%;
  position: fixed;
}

.header {
  top: 50%;
  left: 50%;
  display: none;
  position: fixed;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.footer {
  right: 1rem;
  bottom: 2rem;
  position: absolute;
}
.footer img {
  width: 2.5rem;
  transition: opacity 0.5s;
}
.footer img:hover {
  opacity: 0.5;
}