body {
    padding: 10px;
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
    text-align: center;
  }

  #grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-gap: 1px;
    justify-items: center;
    margin: 20px auto;
    max-width: 400px;
  }

  .cell {
    position: relative;
    width: 20vw;
    height: 20vw;
    max-width: 95px;
    max-height: 95px;
    font-size: 22px;
    background-color: #3a8099;
    background-size: contain;
    border: none;
    border-radius: 5px;
    color: white;
    overflow: hidden;
    display: flex;
    justify-content: flex-end;
    align-items: flex-end;
    padding: 5px;
    user-select: none;
  }

  button {
    padding: 10px 20px;
    font-size: 16px;
    margin: 10px;
    background-color: #4caf50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    user-select: none;
  }

  button:active {
    background-color: #45a049;
  }

  #dir {
    font-weight: bold;
    font-size: 20px;
    color: red;
  }