All layouts were found freely available on the Internet. Less was compiled in css thanks to the LessAutoCompile plugin in the Brackets code editor. Scss was compiled by npm (node.js). To facilitate cross-browser layout, the autoprefixer service was used. All layouts were well adapted to modern versions of major browsers and to their mobile versions.

Cross-browser was tested in:

• IE 11

• Edge 10

• Chrome 77

• Opera 35

• FireFox 73