@media screen and (max-width:767px) {
    ul.woocommerce-order-overview.woocommerce-thankyou-order-details.order_details li {
        border: 1px solid #000000 !important;
        width: 50%;
    }

    ul.woocommerce-order-overview.woocommerce-thankyou-order-details.order_details li * {
        font-size: 16px !important;
    }
      ul.lty-predefined-buttons {
    width: 100%;
  }

}