body{
    height: 100%;
}

.reversi_field{
    margin: auto;
}

.square-wrapper {
    position: relative;
    width: 12.5%;
    border: 1px solid #000;
    float: left;
    text-align: center;
    vertical-align: middle;
}

.spacer {
    position: relative;
    width: 90%;
    padding-bottom: 90%;
    margin: 5% auto;
}

.content {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    border-radius: 100%;
    font-size: 24px;
}

.stone_white {
    background-color: #fff;
    transition: all 500ms 0s ease;
}

.stone_black {
    background-color: #000;
    transition: all 500ms 0s ease;
}

.stone_blue {
    background-color: #00f;
    transition: all 500ms 0s ease;
}
.stone_red {
    background-color: #f00;
    transition: all 500ms 0s ease;
}

.cell_back_green {
    background-color: #00FF00;
    transition: all 500ms 0s ease;
}

.cell_back_magenta {
    background-color: #FF00FF;
    transition: all 500ms 0s ease;
}

.cell_back_red {
    background-color: #FF8080;
    transition: all 500ms 0s ease;
}

.cell_back_blue {
    background-color: #0080FF;
    transition: all 500ms 0s ease;
}

#ad_div{
    display:none !important;
}