CSS

CSS (Cascading Style Sheets) is a style sheet language. It enables to add style (e.g., fonts, colours, spacing) to web documents and the separation of presentation and content. It was initially released in 1996.
Initated by Håkon Wium Lie, Bert Bos, World Wide Web Consortium

Talks

Piotr "piecioshka" Kowalski
Co-founder of @WarsawJS. Blogger. YouTuber. Speaker. Trainer. Developer.
Wassim Chegham
Developer Advocate Engineer — Google Developer Expert