body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f0f0f0;
  }
  
  #board {
    display: grid;
    grid-template-columns: repeat(8, 50px);
    grid-template-rows: repeat(8, 50px);
    gap: 1px;
    background-color: #008000;
  }
  
  .cell {
    width: 50px;
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #007200;
    border: 1px solid #006200;
  }
  
  .cell.valid-move {
    background-color: rgba(255, 255, 255, 0.3);
  }
  
  
  .black, .white {
    width: 40px;
    height: 40px;
    border-radius: 50%;
  }
  
  .black {
    background-color: #000000;
  }
  
  .white {
    background-color: #ffffff;
  }