Webpage design can be broken into two main pieces: structure and style.

page structure

Layout govern the arrangement of cards on a page.  views govern the arrangement of each card's data (name, content, etc). Drilling down even further, you can use structure to govern the arrangement of a card's content.

 

The glue that holds these features together is nesting. Cards include cards include cards. A Layout card includes various cards, including the page's main card. Each inclusion specifies a views. If the card's content is part of the view and it includes other cards, then the process starts over again.

 

page style

At present, styling Decko websites requires directly editing CSS. This will soon change; follow the support skins ticket to stay abreast of the latest changes.