.first {
    background-color: #d0d0d0 !important;
    position: relative;
    z-index: 9999 !important;
    box-shadow: 0.1em 0.3em 0.2em 0.05em rgba(0,0,0,.125);
}
.isScrolling {
    box-shadow: 0.1em 0.3em 0.2em 0.05em rgba(0,0,0,.125);
    position: relative;
    background-color: #ddd;
    z-index: 3;
}

.sticky-wrap tr.selected td.isScrolling, .sticky-wrap tr td.selected-colounm.isScrolling {
    background: #c1e9c5;
}