How To Make Responsive App Landing Page Website Design Using Pure HTML And CSS Only | Step By Step

create a complete responsive app landing page website design using pure html and css only ( no javascript or jquery )
how to make a simple app landing page website design using pure html and css only from scratch.

the main feature of this website are:

✔ responsive sticky header / navbar with toggle menu bar effect.
✔ responsive home section using flexbox.
✔ responsive feature card section using flexbox.
✔ responsive about section using flexbox.
✔ responsive review card section using flexbox.
✔ responsive pricing table section using flexbox.
✔ responsive contact section using flexbox.
✔ responsive footer section using flexbox.

* SOURCE CODES *
https://www.buymeacoffee.com/mrwebdesigner/e/130469

fonts are from google fonts:
https://fonts.google.com/specimen/Poppins

font awesome cdn link:
https://cdnjs.com/libraries/font-awesome

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timestamps:

0:00 demo
3:29 file structure
4:09 header section
11:02 home section
16:02 features section
19:05 about section
22:36 newsletter
26:02 review section
29:44 pricing table section
33:44 contact section
38:12 footer section
43:12 final demo

#FrontEnd
#AppLanding
#CompleteWebsite
#LandingPage
#ResponsiveWebsite
#WebDesign
#WebDevelopment
#HTML5
#CSS3