Estelle is an Open Web evangelist. Estelle started her professional life in architecture and then managed teen health programs. In 2000, she took the natural step of becoming a web standardista. She has consulted for Kodak Gallery, SurveyMonkey, Samsung, Yahoo, Visa, and Apple, among others. Estelle is the author of Mobile HTML5, Transitions & Animations in CSS, and Flexible Boxes in CSS, as well as the co-author of Web Performance Daybook, HTML5 and CSS3 for the Real World, and CSS: The Definitive Guide. While not coding, Estelle works in construction, de-hippifying her 1960s throwback abode.