In order for you to craft a Weapon or Armor in a certain Style you must find or purchase the matching Motif for that Style and read it and have one of the stones needed to make a piece of that type. Gear drops in all different Styles and you can craft Weapons and Armor in various styles. Every Weapon and Armor has a Style and that defines how it will appear. Styles are the appearance or look of the Weapons and Armor you are wearing in Elder Scrolls Online.