Re: Need this style in CSS for headings

[Merri]

It is a good idea to avoid pixel values for letter spacing or with fonts in general. Why? [It makes your life easier!](http://codepen.io/Merri/pen/Kanke)

This one doesn’t need to define a different `letter-spacing` for bold and normal. It also doesn’t need to define a new different value for each header of different size. Same rules fit all sizes and weights :)