body {
  text-align: center;
}

hr {
  width: 500px;
}

#board {
  width: 399px;
  height: 399px;

  background-color: #cdc1b5;
  border: 6px solid #bbada0;
  margin: 0 auto;

  display: flex;
  flex-wrap: wrap;
}

.tile {
  width: 90px;
  height: 90px;
  border: 5px solid #bbada0;
  font-size: 40px;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
}

.x2 {
  background-color: #eee4da;
  color: #727371;
}

.x4 {
  background-color: #ece0ca;
  color: #727371;
}

.x8 {
  background-color: #f4b17a;
  color: white;
}

.x16{
  background-color: #f59575;
  color: white;
}

.x32{
  background-color: #f57c5f;
  color: white;
}

.x64{
  background-color: #f65d3b;
  color: white;
}

.x128{
  background-color: #edce71;
  color: white;
}

.x256{
  background-color: #edcc63;
  color: white;
}

.x512{
  background-color: #edc651;
  color: white;
}

.x1024{
  background-color: #eec744;
  color: white;
}

.x2048{
  background-color: #ecc230;
  color: white;
}

.x4096 {
  background-color: #fe3d3d;
  color: white;
}

.x8192 {
  background-color: #ff2020;
  color: white;
}