body {
  font-family: Arial, Helvetica, sans-serif;
  text-align: center;
}

hr {
  width:500px;
}

#board {
  width:400px;
  height:400px;
  
  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;
  justify-content: center;
  align-items: 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;
}