html, body {
  background-color: black;
  margin: 0;
  padding: 0;
}
  
canvas {
  display: block;
}

.logo {
  position: absolute;
  top: 10px;
  left: 10px;
  max-width: 80px;   /* adjust size */
  height: auto;
  z-index: 10;   /* ensures it stays above the canvas */
  object-fit: contain;
}