* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: hsl(220, 40%, 8%);
}

.mosaic {
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse at center, hsl(220, 35%, 14%) 0%, hsl(220, 40%, 8%) 70%);
}

.mosaic canvas {
  width: 100%;
  height: 100%;
  display: block;
}