.is-large.wc-block-cart .wc-block-cart-items th {
    padding: 8px 16px 8px 8px !important;
    background-color: #212121 !important;
    visibility: visible !important;
}

table.wc-block-cart-items .wc-block-cart-items__header,
table.wc-block-cart-items th,
span.wp-block-woocommerce-cart-order-summary-heading-block {
    background-color: #212121 !important;
    color: #fff !important;
}

table.wc-block-cart-items .wc-block-cart-items__header th span {
    color: #fff !important;
}