A web design blog with tutorials on CSS, SVG, and HTML5 features, plus some posts on design process.
Commenters link its tutorials as answers to practical questions, such as flexbox masonry layouts and responsive SVG.
You can make SVG responsive and thus change the image depending on size http://demosthenes.info/blog/744/Make-SVG-Responsive
Something like this?
http://demosthenes.info/blog/844/Easy-Masonry-Layout-With-Flexbox