body {
  background-color: #333;
}

main {
  position: absolute;
  left: 50%;
  top: 50%;

  transform-origin: 0 0;
  transform:
    scale(1)
    translate(-50%, -50%);

  box-shadow: 0 0 100px rgba(black, 0.2);
}

main canvas {
  clip-path: polygon(
    0 0,
    calc(50% - 5px) 0,
    calc(50% - 5px) 100%,
    0 100%
  );
}

main svg {
  position: absolute;
  left: 0;
  clip-path: polygon(
    calc(50% + 5px) 0,
    100% 0,
    100% 100%,
    calc(50% + 5px) 100%
  );
}