.sticky-table-headers {
    /* Demo */
    border-collapse: collapse;
    width: 100%;
}

.sticky-table-headers tbody {
    border-bottom: 1px solid #d1d5db;
}
.sticky-table-headers thead td {
    padding: 0.25rem;
}
.sticky-table-headers tr {
    border-top: 1px solid #d1d5db;
}

.sticky-table-headers__sticky {
    /* Background color */
    background-color: #9ca3af;

    /* Stick to the left */
    left: 0;
    position: sticky;

    /* Displayed on top of other rows when scrolling */
    z-index: 9999;
}