I know there is another guide like this, but figured I'd make one with visual aids. This is not a guide on HOW to MAKE codes, but rather how to put one in your den.

So starting out, your den might look something like this:



(or brown if you use the day layout)


To apply the CSS layout, you will need to scroll down to your territory description. It will be in the "Edit your Details" area, right underneath the dynasty, achievements, and other tabs.




In this box, you will need to paste the code. I will provide you a code in case you don't have one selected yet.

<*link rel="stylesheet" type="text/css" href="https://dl.dropbox.com/s/q5mf3vf9zl9ldg7/AutumnDeer.css?dl=1"/>

So pasting that code into the territory description, you will need to remove the * and ONLY the * so that it looks like this:


(text box has been enlarged)

once the * has been removed from the code, you will scroll down to the bottom of the "Edit your Details" and click "Save".
Don't scroll too far and hit "change". The button needs to say "Save".

Once you click save, the page will refresh and there will be an alert bar that says "Your details have been saved." It sometimes will take a second after, but if you have followed the steps correctly, your page should now look something like this:





Not all codes will look the same, but it depends on who you get the code from, and if there is ever an * in the code, those will always need to be removed. If you ever have questions about the code, try asking the user who made the layout, as they might be the best ones to ask.

Hope this helps!

*EDIT*
If you don't want to use the code I offered, but don't have one yet, here are a couple threads that have some.

My free layouts

Darklily's Free CSS layouts
*All credit for these layouts does go to Darklily. I've just used and loved their layouts and thought some of you might too.*