* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  background-color: #000;
  overflow: hidden;
}
canvas {
    width: 100%;
    height: auto;
    max-height: 100vh;
    max-height: -webkit-fill-available;
    max-width: 750px;
    z-index: 10000;
    margin: 0 auto;
    padding: 0;
    border: none;
    display: block;
}