body {
    margin: 0;
    padding: 0;
}

#game {
    position: relative;
}

#background {
    position: absolute;
    left: 0;
    top: 0;
    display: none;
    background-size: 100%;
    background-position: center center;
    width: 100%;
    height: 100%;
    opacity: 0.1;
    -webkit-filter: invert(100%);
}

#pieces {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
}

.piece {
    float: left;
    border-right: 1px solid #000;
    border-bottom: 1px solid #000;
    display: block;
}

#grid {
    border-collapse: collapse;
    width: 100%;
    height: 100%;
}

#grid td {
    border: 1px solid #000;
}

#grid tr:last-child td:last-child {
    background: #FFF;
    opacity: 0.6;
}

#info {
    display: none;
    z-index: 999;
    position: absolute;
    top: 62%;
    left: 56%;
    opacity: 0.6;
    background: white;
    padding: 30px;
}

#info h1 {
    font-size: 71pt;
}

#info p {
    text-align: center;
    font-size: 30pt;
}