body {
  font-family: sans-serif;
  background-color: #222;
  color: #eee;
  margin: 0;
  overflow: hidden;
}

header {
  position: absolute;
  top: 0;
  left: 0;
  padding: 1em;
  display: flex;
  justify-content: space-between;
  width: 100%;
  box-sizing: border-box;
}

a {
  color: #8af;
}

.controls {
  position: absolute;
  top: 1em;
  right: 1em;
  display: flex;
  flex-direction: column;
  gap: 0.5em;
}

#main-canvas {
  display: block;
  width: 100vw;
  height: 100vh;
}