Flexible padding for buttons, using flexbox – Terluin Webdesign
CSS3 Media Queries - Examples
3 modern CSS techniques for responsive design - YouTube
Kevin Powell on Twitter: "Modern CSS can make a lot of impossible things possible, but it also simplifies some things as well. One use case that I have on pretty much every
Introduction to the CSS basic box model - CSS: Cascading Style Sheets | MDN
Box model
html - ASP.net CSS max-width not working in IE8 - Stack Overflow