Punk CSS puts your viewport in an iframe. Allowing you to rescale your design while keeping the right proportions and functionality and giving you more room to code and debug. The example in the video is from my project Coleure using this bookmarklet. More features to come.
Drag the bookmarklet to your bookmarks bar. Use it, resize the window and enjoy.
NOTE: Use r to reload the page to prevent the script from being cleared. I’ll fix this soon.