A website building system (WBS) includes an editor to enable a designer of the WBS to create and edit a website on a first sized viewport, the website having at least one component having at least one property with a display pixel value for a measurement of the first sized viewport represented as a designer intent responsive pixel (DIRP), the editor to save a representation of the website according to an original layout of the website, a scaling pixel handler to render the representation onto a second sized viewport and to display the at least one component proportionally as scaled version of the DIRP according to a measurement of the second sized viewport; and where the rendered representation maintains the original layout.