body {
    background-color: brown;
}

table {
    border-collapse: collapse;
    margin: 20px auto;
    background-color: brown; 
}

td {
    width: 100px;
    height: 100px;
    text-align: center;
    vertical-align: middle;
    border: 1px solid black;
}

img {
    width: 100px;
    height: 100px;
}

.board-container {
    position: relative;
}

.overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(255, 255, 255, 0.8);
    padding: 20px;
    border: 2px solid black;
    text-align: center;
}

.thinking {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(255, 255, 255, 0.8);
    padding: 20px;
    border: 2px solid black;
    text-align: center;
}