On: Clever CSS Easter Egg: Search Google For “Tilt” Or “Askew” On Your Smartphone

[motti]

Indeed, it's achieved by adding webkit-specific

  -webkit-transform: rotate(1deg)

CSS transform applied to the body element so it works on the desktop if you use Chrome or another webkit browser.

Not quite sure why they didn't use -moz-transform on Firefox (Gecko) browsers which works the same way.