Writing this book was a long but exciting process; there were many long nights, many renounced weekends, and a lot of patience and perseverance, but it has ultimately made us grow as CSS authors. None of this would have been possible, though, without the help of some truly remarkable, patient, and (above all) inspiring people.

Thank you to everyone who supported us through this endeavor, who encouraged us to go ahead with an idea that came up after a night in the pub, and especially those who motivated us until the very end (even in those moments when we were really hard to be motivated).

Many thanks to our technical reviewer, David Storey, whose input has been invaluable and improved the content of this book manyfold. And to our foreword author, Bruce Lawson, whose opinion we both value greatly.

Special thanks to Adam Lang, Andró Luís, Andrew Fox, Andy Beeching, Anthony Killeen, Calum Land, Christian Heilmann, Dan Jeffrey, Darren Waddell, Edwina Arney, Felix Kennedy, Gavin Williams, Geoffrey Robichaux, Gernot Poetsch, Gonçalo Melo, Ian Pouncey, Isa Costa, Ivo Gomes, Jade Thomas, Jamie Newman, James Newbery, Janak Patel, Kushal Pisavadia, Leah Davenje, Marc Tobias Kunisch, Mark Stickley, Matt Gaddis, Nick Holmes, Nicklas Persson, Paddy Donnelly, Paul Stanton, Sijmen Mulder, Stephanie Hobson, Talia Kennedy, Than Khine, Velcro, everyone that goes to the MF Boat, everyone on The Mailing List™, and everyone who helped us on Twitter.

We would also like to thank those whose work inspires us and many other CSS authors, designers and developers everywhere every day: Andy Budd, Eric Meyer, Nicole Sullivan, Paul Irish, Steve Souders, Tantek Çelik, and all the others.

Of course, we could not have created this book without the support of Apress and everyone involved: our editors Ben Renow-Clarke and Mary Tobin in particular.

And finally, thank you to each other, Antony and Inayaili: writing a book was hard work, but fun nonetheless.