Responsive Getleads Design Using HTML / CSS / JAVASCRIPT

how to make complete responsive business design using html css and javascript.
create a complete responsive online business design template using html css javascript step by step.

the main feature of this website are:
✅ responsive header with search form / shopping cart / login form and navbar toggle effect using javascript.
✅ responsive home section with parallax hover effect.
✅ responsive category section using css grid.
✅ responsive about section using css flexbox.
✅ responsive popular products section using css grid.
✅ responsive banner section using css grid and flexbox.
✅ responsive menu section using css grid.
✅ responsive order form section using css grid and flexbox.
✅ responsive blogs section using css grid.
✅ responsive footer section using css grid.