Building your project with a responsive grid
In the preceding examples, only the grid columns were defined. This should give you a good and realistic impression of how grids work and how to use them. A complete grid code also defines responsive containers and row classes. Most grids will also have so-called gutters between their columns. A gutter (mostly fixed) is a space that separates columns. This also means that a width spanning two columns include one gutter.
In Chapter 4, Avoid Reinventing the Wheel, you have learned to reuse Less and prebuilt mixins; you can do the same for grids. It won't be necessary to write the complete code yourself. Frameworks such as Twitter's Bootstrap, the Golden Grid System (http://goldengridsystem.com/), or Less Framework 4 (http://lessframework.com/) will provide you with all the Less code and mixins you need. Some of these frameworks will be discussed in further detail in Chapter 6, Bootstrap3, WordPress, and Other Applications.
The following examples will...