Google Docs just keeps getting better and better. Later yesterday the Google Docs team added a new feature to Google Docs which allows Google Docs users to add custom styling to documents using CSS. CSS is basically a type of style sheet markup language which enables you to create a personalized look for your web page or documents. It is used in collaboration with HTML mostly to give styles to web pages and documents.

More likely it is assumed that if you know and use Google Docs already there is a chance you would know a little of CSS already but if you don't you can checkout the CSS tutorial at Tizag that will help you out with learning CSS (I used this tutorial to learn CSS 2 years ago and now I am an expert). Learning CSS will not only help you give custom styles to your Google Docs documents but it will also be your first step into becoming a web designer.

To learn using CSS styles with Google Docs you can checkout the Styles in Google Docs page where you get tips and tricks related to styling documents using CSS.

To edit the style of a document simply open the Edit menu and click "Edit CSS"