body {
  text-align: center;
  background-color: #011F3F;
}

h2 {
  margin: 50px;
}

#level-title {
  font-family: 'Press Start 2P', cursive;
  font-size: 3rem;
  margin:  5%;
  color: #FEF2BF;
}

.container {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;

  width: min(90vw, 500px);
  margin: auto;
}

.btn {
  aspect-ratio: 1 / 1;
  border: 10px solid black;
  border-radius: 20%;
  margin: 30px;
}

.game-over {
  background-color: red;
  opacity: 0.8;
}

.red {
  background-color: red;
}

.green {
  background-color: green;
}

.blue {
  background-color: blue;
}

.yellow {
  background-color: yellow;
}

.pressed {
  box-shadow: 0 0 20px white;
  background-color: grey;
}

@media (max-width: 600px) {
  .btn {
    height: 100px;
    width: 100px;
    margin: 10px;
  }

  .container {
    display: flex;
    justify-content: center;
    width: 100%;
  }
}