body, html {
  margin: 0;
  padding: 0;
  height: 100%; /* Ensure full height */
  background-color: #c7a67a; /* Replace with your desired background color */
  
}

#sketch-holder {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
}
canvas {
  display: block;
  border: 5px solid #9a774c;
}