Does X support Y?
Horizontal and Vertical Centering
- hasLayout.net Horizontal Centering
- Horizontal Centering using CSS
- hasLayout.net Vertical Centering
- zerosixthree Vertical Align Anything in 3 lines of CSS
How do I create a 2-column, 3-column layout? How do I create a header? How do I create a footer?
How do I prevent floats from leaving their container?
How to I make my website responsive?
- ALA - Responsive Web Design
- Beginners Guide to Responsive Web Design
- Liquidapsive — What’s the difference between Responsive, Liquid and Adaptive Layouts?
- MediaQueri.es — Examples of responsive layouts
Form Widget Styles
How do I change how a form looks?