.product-single__add .c-btn {
    background: #212121;
    color: #fff;
}
.product-top shopify-payment-terms {
    display: none;
}
.product-single__add {
    display: block !important;
}
.product-single__add .product-single__add-btn {
    opacity: 1 !important;
}
.product-single__add .shopify-payment-button {
    opacity: 1 !important;
}