/* Add to Cart - Quantity left, Button full width right */
.single-product .variations_form .woocommerce-variation-add-to-cart {
    display: flex !important;
    flex-wrap: wrap !important;
    align-items: center !important;
    gap: 10px !important;
}

.single-product .variations_form .woocommerce-variation-add-to-cart .single_add_to_cart_button {
    flex: 1 1 auto !important;
    width: auto !important;
    min-width: 0 !important;
}

/* Buy Now button - full width below */
.single-product #wd-add-to-cart {
    display: block !important;
    width: 100% !important;
    margin-top: 5px !important;
    box-sizing: border-box !important;
}