body {
    margin: 0;
    line-height: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
    background-color: #302E2B;
    -webkit-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.controls {
    margin: 15px;
    text-align: center;
}

.control {
    height: 30px;
    margin: 5px 10px 5px 10px;
    font-size: 20px;
    font-family: Arial;
}

.game {
    display: flex;
    justify-content: center;
    align-items: center;
}

.board {
    width: 100%;
    height: 100%;
}

.popup {
    position: absolute;
    font-size: 15vmin;
    font-family: Arial;
    color: darkorange;
    -webkit-text-stroke: 0.4vmin black;
}

.square-white, .square-green {
    width: 12.5%;
    height: 12.5%;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.square-white {
    background-color: #ecedd0;
}

.square-green {
    background-color: #739552;
}

.piece {
    width: 100%;
    position: absolute;
}

.possible-move {
    width: 30%;
    height: 30%;
    border-radius: 50%;
    position: absolute;
    background-color: rgba(50, 50, 50, 0.50);
}

.capture-move {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    position: absolute;
    box-sizing: border-box;
    border: 0.9vmin solid rgba(50, 50, 50, 0.50);
}

.highlight-move {
    width: 100%;
    height: 100%;
    background-color: rgba(248, 250, 131, 0.65);
}