body {
  margin: 0px;
  width: 100vw;
  height: 100vh;
  background-color: aliceblue;
  overflow-x: hidden;
  overflow-y: hidden;
}

.GameContainer {
  width: 500px;
  height: 500px;
  position: relative;
  border-style: solid;
  border-width: 1px;
  border-color: blue;
}

.startBtnContainer {
  position: absolute;
  left: 0;
  top: 240px;
  z-index: 2;
  width: 500px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.restartBtnContainer {
  position: absolute;
  left: 0;
  top: 300px;
  z-index: 2;
  width: 500px;
  display: flex;
  justify-content: center;
  align-items: center;
}

#startBtn,
#restartBtn {
  outline: none;
  cursor: pointer;
  width: 120px;
  height: 30px;
  background-color: rgb(4, 219, 47);
  color: white;
  border-width: 2px;
  border-color: white;
  border-style: solid;
  border-radius: 5px;
}

#gameArea {
  left: 0;
  top: 0;
  z-index: 1;
  position: absolute;
  background-color: black;
  border: none;
}