src/spreadSheet/style.scss
.dtc-handsontable-no-border {
    .handsontable {
        tbody {
            th.ht__highlight {
                background-color: #E8F1FF;
            }
            th.ht__active__highlight {
                background-color: #E8F1FF;
            }
        }
        thead tr:first-child th {
            background: #F9F9FA;
            border-top: 0;
        }
        th {
            background: #FFF;
            border-right: solid 1px #EBECF0;
            color: #3D446E;

            /* SM/Medium */
            font-family: "PingFang SC";
            font-size: 12px;
            font-style: normal;
            font-weight: 500;
            text-align: left;
            &:first-child {
                border-left: 0;
            }
            &:nth-child(2) {
                border-left: solid 1px #EBECF0;
            }
            &:last-child {
                border-right: solid 1px #EBECF0;
                border-bottom: solid 1px #EBECF0;
            }
        }
        tr {
            &:first-child {
                th {
                    border-top: solid 1px #EBECF0;
                }
                td {
                    border-top: solid 1px #EBECF0;
                    &:first-of-type {
                        border-left: solid 1px #EBECF0;
                    }
                }
            }
        }
        td {
            border-right: solid 1px #EBECF0;
            border-bottom: solid 1px #EBECF0;
            color: #3D446E;

            /* SM/Medium */
            font-family: "PingFang SC";
            font-size: 12px;
            font-style: normal;
            font-weight: 400;
            &:first-of-type {
                border-left: solid 1px #EBECF0;
            }
        }
        td.area {
            &::before {
                background: #1D78FF;
            }
        }
    }
}

.ht_master:not(.innerBorderLeft):not(.emptyColumns) ~ .handsontable tbody tr th {
    font-weight: 400;
}

.handsontable.htRowHeaders {
    thead {
        tr {
            th {
                &:nth-child(2) {
                    border-left: solid 1px #EBECF0 !important;
                }
            }
        }
    }
}
