body {
  margin: 0;
  background-color: lightgray;
}

#start-btn {
  background-color: green;
  color: white;
  padding: 20px;
  font-size: 20px;
  margin-top: 40px;
  border-radius: 10px;
}

.container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  margin: 50px;
}

#game-box {
  background-color: darkgray;
  width: 1200px;
  height: 800px;

  position: relative; /* allows us to position inner elements (absolute) related the the game-box */
  overflow: hidden; /* prevents elements to visually exit the game-box */
  user-select: none; /* prevents elements inside the game-box to be highlighted. This improves the user experience for click events on the game-box */
}

#game-box * {
  pointer-events: none; /* prevents elements in the game-box to be dragged. This improves the user experience for click events on the game-box  */
}

#game-screen,
#game-over-screen {
  display: none;
}

#game-box {
  background-image: url("../images/bg.png");
  background-size: cover;
}

.top-left {
  position: absolute;
  top: 8px;
  left: 16px;
  font-size: xxx-large;
  font-family: Impact, Haettenschweiler, "Arial Narrow Bold", sans-serif;
}

.top-center {
  position: absolute;
  top: 8px;
  text-align: center;
  font-size: xxx-large;
  color: white;
  font-family: Impact, Haettenschweiler, "Arial Narrow Bold", sans-serif;
}