@font-face {
	font-family: 'Anton';
	src: url(Anton-Regular.ttf);
}

#demo{
    font-family:Anton;
}
#demo *{
  box-sizing:border-box;
}
#demo p {
    text-align: center;
    font-size:24px;
    margin: 0;
}
.board {
    display: table;
    margin: 0 auto;
    border-spacing: 2px;
    width: fit-content;
    font-weight: bold;
    font-family: 'メイリオ',Meiryo,'ＭＳ Ｐゴシック',sans-serif;
}
.board > div {
    display: table-row;
}
.board > div:nth-child(1),
.board > div:nth-child(12) {
    display: none;
}
.board > div > a {
    display: table-cell;
    vertical-align: middle;
    border-radius: 4px;
    height: 4.0em;
    width: 3em;
    border: 2px solid black;
    font-weight: bold;
    text-align: center;
    cursor: default;
    user-select: none;
}
.board > div > a.wall {
    background: black;
    visibility: hidden;
}
.board > div > a.none {
    visibility: hidden;
}
.board > div > a:hover {
    border: 2px solid #999;
}
.board > div > a.selected {
    border: 2px solid #f00;
}

.c-r{
  background:hsl(0deg 0% 100%);
}
.c-b{
  background:hsl(90deg 0% 85%);
}
.c-g{
  background:hsl(180deg 0% 70%);
}
.c-y{
  background:hsl(270deg 0% 55%);
}