body,main {
  padding: 0;
  margin: 0;
  overflow: hidden;
  display: flex;  
}

html, body {
  height: 100%;
  background-color: #000;
}

body {
  margin: 0;
  display: flex;

  /* This centers our sketch horizontally. */
  justify-content: center;

  /* This centers our sketch vertically. */
  align-items: center;
  overflow: hidden;
}