main.css

#marbleBox {
  height: 100vh;
  width: 100vw;
  position: relative;
  top: -2rem;
  left: -2rem;

}

.box__marble {
  position: absolute;
  top: 50%;
  left: 50%;
  transition: all 0.01s ease;
  background-color: pink;
  border-radius: 50%;
  width: 4rem;
  height: 4rem;
  z-index: 1;
}

.box__hole {
  position: absolute;
  background-color: black;
  border-radius: 30%;
  width: 4.5rem;
  height: 4.5rem;
}