.chess-board {
    border-spacing: 0;
    border-collapse: collapse;
    margin: auto;
}

.chess-board th {
    padding: 10px;
}

.chess-board td {
    border: 1px solid;
    width: 70px;
    height: 70px;
    font-size: 50px;
    text-align: center;
}

.chess-board .dark {
    background: rgb(124, 124, 124);
}

.btn {
    width: 100%;
    height: 100%;
    font-size: 50px;
    background-color: transparent;
}

.button {
    text-align: center;
}

.btn_gamestart,
.btn_gamereset {
    margin-right: 2%;
    padding: 5px;
}

@keyframes fadeMe {
    0%,
    100% {
        background: lightgreen;
    }
}