html {
    background-color: rgb(238,238,238);
    position:relative;
}

html, body {
  margin: 0;
  padding: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  touch-action: none;
}

main {
  margin:auto;
}

canvas {
    overflow:hidden;
    position:fixed;
    align-self: center;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    filter:drop-shadow(1px 5px 20px #9e9e9e);
    z-index: -1;
    border-radius: 25% 75% 71% 29% / 34% 47% 53% 66%;
}