This is an example of a simple single product card with add to cart button, designed using HTML, CSS, and Bootstrap framework 4. The product image is imported to the code using its URL. The body of the form is given a background color as #E0E0E0. The product card is given the styles of box-shadow as 0 20px 40px rgba(0, 0, 0, .2), border-radius as 5px, and padding-bottom as 10px. The card title is given a font-weight as bold to highlight the text. The View Details button is given a border style as 1.5px solid grey, font color as #212121, width as 100%, and box-shadow style as 0px 0px 10px #212121. The Add to Cart button is given a background color as #212121, font color as white, margin-top as 10px, font-size as 12px, font-weight as 900, width as 100%, height as 39px, padding-top as 9px, and box-shadow style as 0px 5px 10px #212121. Source: https://bbbootstrap.com/snippets/ecommerce-single-product-add-cart-button-21268162