//Page / Inline 

.irCustomStyles .a-IRR-table td {
    border-top: 0 solid #ffffff !important;
}

.irCustomStyles table.a-IRR-table th:first-child.a-IRR-header:not(.a-IRR-header--group) {
  background-color: white !important;
}

.irCustomStyles table.a-IRR-table tr:has( .a-IRR-header ) {
    border-bottom: medium none white !important;
    border-top: medium none white !important;
}