*{
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
canvas{
  display: block;
}
body{
  width: 100vw;
  height: 100vh;
}
body .dg.ac{
  z-index: 10;
}

body .window{
  min-width: 0;
  min-height: 0;
}