body,
html {
  margin: 0;
  background-color: rgb(30, 30, 30);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
}

main {
  display: flex;
  align-items: center;
  justify-content: center;
}

canvas {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  max-width: 100%;
  max-height: 100%;
  object-fit: scale-down;
  box-shadow: 5px 5px 15px 2px rgba(0, 0, 0, 0.3);
  z-index: 1;
}