html, body, main {height: 100%;width: 100%;margin: 0;background: #222222;overflow: hidden;}main {display: flex;align-items: center;justify-content: center;}canvas {height: auto;width: auto;max-width: 100%;max-height: 100%;}canvas {max-width: 100%;max-height: 100%;margin: auto;overflow: auto;position: fixed;object-fit: contain;top: 0;bottom: 0;left: 0;right: 0;}