ONLY HTML/CSS

Create an attractive and responsive Web page using the following:

Flex Box Model

@media query

two-column description (CSS3)

at least one box with rounded corners (CSS3) with a background color or image

pseudoclasses and pseudoelements

embedded video

some text color with different sizes

an image

at least one HTML5 structural element

at least a link

a form for the user to submit asking for more info about the product

The content is an advertisement of a product of your choosing. It should have enough information to promote the product and make the user wants to buy or learn more. The layout is up to you to attract future customers.