Simplest tip ever: Use Visual Studio's Go To Definition with CSS classes to get from your HTML to the relevant CSS rule. First click on the name of a class in your HTML ...

You can also replace 200px with a percentage value such as 300% in the CSS class. This allows you to stretch an image by a percent instead of by a pixel amount. If your img tag already contains a ...

This code creates a CSS class named redBorder. If one of your HTML img tags references this class, site visitors see a solid red border around the image when viewing it on your webpage.

Pure CSS offers a minimalist, mobile-first approach to CSS layouts in your web pages. Let's get started with this lightweight framework, which you can use as-is or extend with a variety of plugins.