body {
  overflow: hidden;
  margin: 0;
  padding: 0;
  background-color: #000;
}

div#game-container {
  width: 100%;
  height: 100%;
  position: fixed;
  background-color: #000;
}

div#game-life {
  aspect-ratio: 1 / 1;
  background-color: #000;
  max-height: 100%;
  max-width: 100%;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(120, 0.8333333vmin);
  grid-template-rows: repeat(80, 1.25vmin);
  gap: 0;
}

@media (orientation: landscape) {
  div#game-life {
    /*border-left: 1px solid #FFF;*/
    /*border-right: 1px solid #FFF;*/
  }
}

@media (orientation: portrait) {
  div#game-life {
    /*border-bottom: 1px solid #FFF;*/
  }
}

div#game-life div {
  /*aspect-ratio: 1 / 1;*/
  text-align: center;
  /*background-color: #FFF;*/
  color: #FFF;
  font-size: 1.333333vmin;
}

button {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 9;
}