.char-square {
    font-family: "Noto Sans Mono CJK JP", "Source Han Code JP",
    "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
    background: #fff;
/*  border: 1px solid #999;  */
    float: left;
    font-size: 28px;
    font-weight: bold;
    line-height: 40px;
    height: 48px;
    margin-right: -1px;
    margin-top: -1px;
    padding: 0;
    text-align: center;
    width: 48px;
    max-height: 48px;
    min-height: 48px;
    max-width: 48px;
    min-width: 48px;
}
.char-square-on {
    font-family: "Noto Sans Mono CJK JP", "Source Han Code JP",
    "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
    background: #17a2b8;
    color: #fff;
/*  border: 1px solid #999;  */
    float: left;
    font-size: 28px;
    font-weight: bold;
    line-height: 40px;
    height: 48px;
    margin-right: -1px;
    margin-top: -1px;
    padding: 0;
    text-align: center;
    width: 48px;
    max-height: 48px;
    min-height: 48px;
    max-width: 48px;
    min-width: 48px;
}
.num-square {
    font-family: "Noto Sans Mono CJK JP", "Source Han Code JP",
    "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
    background: #fff;
/*  border: 1px solid #999;  */
    float: left;
    font-size: 16px;
    font-weight: bold;
    line-height: 48px;
    height: 48px;
    margin-right: -1px;
    margin-top: -1px;
    padding: 0;
    text-align: center;
    width: 48px;
    max-height: 48px;
    min-height: 48px;
    max-width: 48px;
    min-width: 48px;
}
.num-square-on {
    font-family: "Noto Sans Mono CJK JP", "Source Han Code JP",
    "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
    background: #17a2b8;
    color: #fff;
/*  border: 1px solid #999;  */
    float: left;
    font-size: 16px;
    font-weight: bold;
    line-height: 48px;
    height: 48px;
    margin-right: -1px;
    margin-top: -1px;
    padding: 0;
    text-align: center;
    width: 48px;
    max-height: 48px;
    min-height: 48px;
    max-width: 48px;
    min-width: 48px;
}
th{
    padding: 0px 0px;
}
.footer {
    background-color: #f5f5f5;
}