body{
  color: white; 
  background-color: black;
}

button {
  margin: 20px 0;
  width: 100px;
  position: relative;
}

#menu,
#startScreen {
  font-size: large;
  width: 1280px;
  height: 720px;
  position: absolute; 
  top: 0%;
  left: 0%; 
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 20%;
  background-color: rgba(0, 0, 0, .5);
  font-size: 35px;
}

#startScreen {
  z-index: 1;
}
#menu {
  z-index: -1;
}

#canvasContainer {
  position: relative;
}