td.diagonalRising {
    background: linear-gradient(to right bottom, #ffffff 0%,#ffffff 49.9%,#000000 50%,#000000 51%,#ffffff 51.1%,#ffffff 100%);
}

td.diagonalFalling {
    background: linear-gradient(to right top, #ffffff 0%,#ffffff 49.9%,#000000 50%,#000000 51%,#ffffff 51.1%,#ffffff 100%);
}

td.diagonalCross {
    position: relative;
    background: linear-gradient(to right bottom, rgba(0,0,0,0) 0%,rgba(0,0,0,0) 49.9%,rgba(0,0,0,1) 50%,rgba(0,0,0,1) 51%,rgba(0,0,0,0) 51.1%,rgba(0,0,0,0) 100%);
}

td.diagonalCross:after {
    content: "";
    display: block;
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: -1;
    background: linear-gradient(to right top, #ffffff 0%,#ffffff 49.9%,#000000 50%,#000000 51%,#ffffff 51.1%,#ffffff 100%);
}

.sticky-col {
    position: sticky;
    position: -webkit-sticky;
    background-color: white;
}

.first-col {
    width: auto;
    left: 0px;
}