body {
  background-color: rgb(255, 255, 255);
  padding: 0px;
  margin: 0px;
  width: 100vw;
  height: 100vh;
}

#mainCanvas{
  width: 100%;
  height: 100%;
  margin: 0px;
  padding: 0px;
}

div{
  margin: 0px;
  padding: 0px;
}