/* bodyからkifPlayer_blockクラスに適用範囲変更 */
.kifPlayer_block {
    width: 100%;
    max-width: 450px;
    margin: 0 auto;
    touch-action: manipulation;
}

.center-block {
    padding: 0;
    text-align: center;
}

#board {
    width: 100%;
    height: auto;
    margin-bottom: 18px;
}

.ref {
    display: block;
    border: 2px dotted #000000;
    border-radius: 5px;
}

@media screen and (min-width: 970px) {
    .ctlbtn {
        font-size: 47.5px;
    }
}
@media screen and (max-width: 970px) {
    .ctlbtn {
        font-size: 5vw;
    }
}
@media screen and (max-width: 750px) {
    .ctlbtn {
        font-size: 6vw;
    }
}

.btn {
}

.ctlbtn {
    font-size: 20px;
    display: inline;
    list-style: none;
    margin: 7px;
    padding: 12px 4%;
    text-decoration: none;
    color: #000000;
    border: solid 2px #000000;
    border-radius: 3px;
    transition: .4s;
    cursor: pointer;
    -ms-user-select: none;
    -webkit-user-select: none;
    user-select: none;

}

.ctlbtn:hover {
    background: #000000;
    color: white;
}

.shogiboard {
    width: 100%;
    -ms-user-select: none;
    -webkit-user-select: none;
    user-select: none;
}