body {
  background-color: var(--theme-bg);
}

#bg-canvas {
  display:block;
  position: fixed;
  
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
}

.centered {
  position: absolute;
  inset: 0 0 0 0;
  margin: auto;

  display: flex;
}

.heading {
  font-family: monospace;
  font-size: 2em;
  font-weight: bold;
}