Style system in AEM 6.4

[#1]

I am beginner in AEM, help me with where can i start for style system in 6.4? Is there any douments, provide me.

[#2]

Here you go:-

Video Adobe Experience Manager Help | Using the Style System with AEM Sites

Video Adobe Experience Manager Help | Understanding how to code for the AEM Style System

Doc: Getting Started with AEM Sites Part 4 - Developing with the Style System

[#3]

Could you please share the steps to create page with editable templates using style system in AEM 6.4..

[#4]

Style is covered in this document - I recommend that you go through all sections.

Getting Started with AEM Sites - WKND Tutorial

[#5]

How to add page to navigation bar while creating pages like in weretail.may i get source code of that .