I create the layout of sites according to the specification of HTML 5 in compliance with the WAI-ARIA standard.
The structure of the site is logical and understandable to any "Screen Reader", there is no difficulty with the keyboard control.
Layout will be made according to your choice: floats, flexs, grids. I can use any libraries you wish, for example, Bootstrap 4, Materialize, Foundation, etc.
All pictures that need to be uploaded to the site will be adapted for quick download or Retina screens.
These options are included in any package Kwork.
It is possible to use existing js libraries, or write pure js-code.
Additionally, it is possible to adapt to mobile devices / tablets (10$ - 1 page or 1 000 px).
Checking the quality of the layout is made on the validator: http://validator.w3.org, "light house" and "google page speed" (to evaluate search engine optimization).