html, body {
    margin: 0;
    padding: 0;
    background-color: #1f1f1f;
}


#content {
    display: block;
    width: 1280px;
    height: auto;
    left: 50%;
    margin: auto;
    padding: 20px;
    text-align: center;
}


h1 {
    color: #ffffff;
    border-bottom: 1px solid #ffffff;
}


.next-code {
    font-size: 0;
    background-color: #686868;
    width: 430px;
    padding: 10px;
    left: 50%;
    margin: 10px auto;
    border: 5px solid #ffffff;
}


.nest-letter {
    display: inline-block;
    width: 100px;
    height: 100px;
}


.nest-letter-segment {
    display: inline-block;
    width: 20px;
    height: 20px;
}


.nest-letter-segment.active {
    background-color: #ffffff;
}


.chess {
    display: block;
    background: url("../img/ChessPieces.svg") no-repeat;
    background-size: auto 150px;
    background-position-y: center;
    width: 30px;
    height: 100px;
    left: 50%;
    margin: auto;
}


.king {
    background-position-x: 0;
}


.queen {
    background-position-x: -30px;
}


/* Läufer */
.bishop {
    background-position-x: -60px;
}


/* Springer */
.knight {
    background-position-x: -88px;
}


.tower {
    background-position-x: -117px;
}


.pawn  {
    background-position-x: -143px;
}