1. BEM preferably
2. Sass/Less/CSS Modules (use one of them)
3. Images should be Retina-ready
4. Page should look fine on other than provided resolutions in mockups as well.
5. Chrome, Firefox, Safari, Edge and IE 11.
6. Use React Redux or React Hooks API.
7. Bootstrap/Material UI optional

Task:

1. Use create-react-app as boilerplate
2. Prepare html and css for header, footer and product list https://prnt.sc/q71r9w (mockups for desktop, tablet and mobile attached)
3. Create simple ReactJS shop application. After click on Order button popup with order details should be shown. The look of this popup is up to you.