:root{
    --size-cell: 32px;
}

table {
    border-collapse: collapse;
    empty-cells: show;
}
.main td {
    border: 1px solid #000;
    position: relative;
    width: var(--size-cell);
    height: var(--size-cell);
    text-align: center;
}
.main td img {
    position: absolute;
    width: var(--size-cell);
    height: var(--size-cell);
    top: 0;
    left: 0;
}
.hide{
    display: none;
}

.info {
    display: inline-block;
}
.info > span {
    color: blue;
}