/* Quantity buttons must not inherit the site's 100px button padding. */
div.quantity > button:is(.minus, .plus) {
    flex: 0 0 44px;
    width: 44px;
    min-width: 44px;
    max-width: 44px;
    height: 44px;
    min-height: 44px;
    padding: 0 5px;
    font-size: 18px;
    line-height: 1;
}

div.quantity > input.qty[type="number"] {
    flex: 0 0 44px;
    width: 44px;
    min-width: 44px;
    height: 44px;
    min-height: 44px;
}

.single-product .summary form.cart .single_add_to_cart_button {
    flex: 1 1 auto;
    min-width: 0;
    max-width: 100%;
    min-height: 44px;
    padding: 10px 16px;
}