body {
  background-color: #E9967A;
  display: flex;
  height: 100vh;
  user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  -webkit-user-select: none;
}

main {
  display: flex;
  flex-direction: column;
  height: 26rem;
  justify-content: center;
  margin: auto;
}

button {
  cursor: pointer;
}

div, button {
  -webkit-tap-highlight-color: transparent;
}

.puzzle {
  background-color: #FFFAF0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  height: 22.5rem;
  margin: auto;
  width: 22.5rem;
}

[class^="tile"] {
  background-image: url("../images/flower.png");
  background-size: 22.5rem;
  cursor: pointer;
}

[class^="tile"].transition {
  transition: transform linear .1s;
}

.tile1 {
  background-position: 0 0;
}

.tile2 {
  background-position: -5.625rem 0;
}

.tile3 {
  background-position: -11.25rem 0;
}

.tile4 {
  background-position: -16.875rem 0;
}

.tile5 {
  background-position: 0 -5.625rem;
}

.tile6 {
  background-position: -5.625rem -5.625rem;
}

.tile7 {
  background-position: -11.25rem -5.625rem;
}

.tile8 {
  background-position: -16.875rem -5.625rem;
}

.tile9 {
  background-position: 0 -11.25rem;
}

.tile10 {
  background-position: -5.625rem -11.25rem;
}

.tile11 {
  background-position: -11.25rem -11.25rem;
}

.tile12 {
  background-position: -16.875rem -11.25rem;
}

.tile13 {
  background-position: 0 -16.875rem;
}

.tile14 {
  background-position: -5.625rem -16.875rem;
}

.tile15 {
  background-position: -11.25rem -16.875rem;
}

.tile16 {
  background: #FFFAF0;
  cursor: default;
}

.options {
  display: flex;
  justify-content: center;
  margin: auto;
  width: 16rem;
}

.btn {
  align-items: center;
  background-color: #FFFAF0;
  border: .0625rem solid #800080;
  border-radius: .5rem;
  display: inline-flex;
  font-size: .8rem;
  height: 1.5rem;
  justify-content: center;
  line-height: 1.5rem;
  margin: 0 1rem;
  transition: transform linear .2s;
  white-space: nowrap;
  width: 6.2rem;
}

.btn:focus {
  border-color: #719ECE;
  color: #800080;
  outline: none;
  transform: scale(1.05);
}

@media (hover: hover) {
  .btn:hover {
    border-color: #719ECE;
    color: #800080;
    transform: scale(1.05);
  }
}

@media only screen and (max-width: 26rem) {
  main {
    height: 24rem;
  }

  .puzzle {
    height: 20rem;
    width: 20rem;
  }

  [class^="tile"] {
    background-size: 20rem;
  }

  .tile1 {
    background-position: 0 0;
  }

  .tile2 {
    background-position: -5rem 0;
  }

  .tile3 {
    background-position: -10rem 0;
  }

  .tile4 {
    background-position: -15rem 0;
  }

  .tile5 {
    background-position: 0 -5rem;
  }

  .tile6 {
    background-position: -5rem -5rem;
  }

  .tile7 {
    background-position: -10rem -5rem;
  }

  .tile8 {
    background-position: -15rem -5rem;
  }

  .tile9 {
    background-position: 0 -10rem;
  }

  .tile10 {
    background-position: -5rem -10rem;
  }

  .tile11 {
    background-position: -10rem -10rem;
  }

  .tile12 {
    background-position: -15rem -10rem;
  }

  .tile13 {
    background-position: 0 -15rem;
  }

  .tile14 {
    background-position: -5rem -15rem;
  }

  .tile15 {
    background-position: -10rem -15rem;
  }
}

@media only screen and (max-width: 20rem) {
  main {
    height: 18rem;
  }

  .puzzle {
    height: 14rem;
    width: 14rem;
  }

  [class^="tile"] {
    background-size: 14rem;
  }

  .tile1 {
    background-position: 0 0;
  }

  .tile2 {
    background-position: -3.5rem 0;
  }

  .tile3 {
    background-position: -7rem 0;
  }

  .tile4 {
    background-position: -10.5rem 0;
  }

  .tile5 {
    background-position: 0 -3.5rem;
  }

  .tile6 {
    background-position: -3.5rem -3.5rem;
  }

  .tile7 {
    background-position: -7rem -3.5rem;
  }

  .tile8 {
    background-position: -10.5rem -3.5rem;
  }

  .tile9 {
    background-position: 0 -7rem;
  }

  .tile10 {
    background-position: -3.5rem -7rem;
  }

  .tile11 {
    background-position: -7rem -7rem;
  }

  .tile12 {
    background-position: -10.5rem -7rem;
  }

  .tile13 {
    background-position: 0 -10.5rem;
  }

  .tile14 {
    background-position: -3.5rem -10.5rem;
  }

  .tile15 {
    background-position: -7rem -10.5rem;
  }
}