body, html {
  margin: 0;
  background: #f6f6f6;
  overflow: hidden;
  height: 100%;
}

#game-2048 {
  position: relative;
  width: 1200px;
  height: 800px;
  margin: 3% auto 0;
  border: 6px ridge rgba(125, 96, 42, 0.63);
  display: flex;
}

.caption-board {
  width: 260px;
  border-right: 6px ridge rgba(125, 96, 42, 0.63);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-direction: column;
}

.caption-board .title {
  font-size: 60px;
}

.caption-board p {
  font-size: 28px;
}

#start {
  width: 160px;
  height: 40px;
  margin: 50px 0;
  border-radius: 10px;
  box-shadow: 2px 2px 6px rgba(0, 0, 0, 0.5);
  outline: none;
  background-color: #bbada0;
}

#start:hover {
  background-color: #ccc0b3;
}

.board-container {
  flex: 1;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.board-container .board {
  width: 600px;
  height: 600px;
  box-sizing: border-box;
  border-radius: 10px;
  background: #bbada0;
  position: relative;
}

.board-grids-wrap, 
.board-chess-wrap {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
}

.board-grids-item,
.board-chess-item {
  border-radius: 6px;
  position: absolute;
  left: 0;
  top: 0;
  width: 130px;
  height: 130px;
}

.board-grids-item {
  background: #ccc0b3;
}

.board-chess-item {
  background: #000000;
  color: #ffffff;
  display: flex;
  font-size: 40px;
  justify-content: center;
  align-items: center;
  word-break: break-all;
  text-align: center;
  text-overflow: ellipsis;
  overflow: hidden;
}