body{
  font-family:Arial;
  display:flex;
  justify-content:center;
  align-items:center;
  height:100vh;
  margin:0;
}

#container{
  display:flex;
  gap:20px;
}

#ui{
  width:200px;
  padding:10px;
  border:2px solid black;
}

.activeSetting{
  background-color:gray;
  color:white;
}

canvas{
  border:2px solid black;
  background-color:green;
}