*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  text-align: center;
  background-color: #011F3F;
  width: 100vw;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
}

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

.container {
  display: block;
  /* width: 50%; */
  /* margin: auto; */
  /* background-color: red; */
}

.btn {
  margin: 25px;
  display: inline-block;
  height: 200px;
  width: 200px;
  border: 10px solid black;
  border-radius: 20%;
}

.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;
}

/* ================== mobile screens ====================== */

@media screen and (max-width: 375px) {
  body {
    justify-content: space-evenly;
  }
  #level-title {
    font-size: 1.3rem;
    line-height: 1.5;
  }
  .btn {
    height: 150px;
    width: 150px;
    margin: 0;
    border: 7px solid black;
  }
}

/* ================ tablet screens ======================== */
@media screen and (min-width: 376px)  and (max-width: 765px) {
  body {
    justify-content: space-evenly;
  }
  #level-title {
    font-size: 3rem;
    line-height: 1.5;
  }
  .btn {
    margin: 0;
    border: 8px solid black;
  }
}