In his talk Mathias showcases a series of obscure CSS fun facts, such as CSS syntax gimmicks and quirks, weird tricks that involve CSS in one way or another, and security vulnerabilities that are enabled by (ab)using CSS in unexpected ways.
Mathias is a Belgian web standards expert collaborating on open-source projects such as jsPerf and HTML5 Boilerplate. At Opera Software he’s a member of the Developer Relations team.
https://twitter.com/mathias
https://mathiasbynens.be/